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This page shows you the most recent publications within this specialty of the MedWorm directory. This is page number 21.

Increasing Curie temperature in tetragonal MnRhSn Heusler compound through substitution of Rh by Co and Mn by Rh
Vajiheh Alijani, Olga Meshcheriakova, Juergen Winterlik, Guido Kreiner, Gerhard H. Fecher et al. The tetragonal MnRhSn Heusler compound shows better lattice match with MgO than do MnGa and tetragonal MnCoGa Heusler compounds and hence is better suited for spin transfer torque applications. Beside the improved lattice match, this compound shows a low saturation magnetic moment reduces the curren ... [J. Appl. Phys. 113, 063904 (2013)] published Mon Feb 11, 2013.
Source: Journal of Applied Physics - February 12, 2013 Category: Physics Source Type: research

Effect of chiral property on hot phonon distribution and energy loss rate due to surface polar phonons in a bilayer graphene
V. S. Katti and S. S. Kubakaddi Effect of chiral property on hot phonon distribution and hot electron energy loss rate due to surface polar phonons is investigated in a supported bilayer graphene. Hot phonon distribution N(omega) with chiral property shows a new feature of appearance of a cusp. Interestingly, minimum of the cusp i ... [J. Appl. Phys. 113, 063705 (2013)] published Mon Feb 11, 2013.
Source: Journal of Applied Physics - February 12, 2013 Category: Physics Source Type: research

Negative magnetoresistance and anomalous Hall effect in GeMnTe-SnMnTe spin-glass-like system
L. Kilanski, R. Szymczak, W. Dobrowolski, A. Podgorni, A. Avdonin et al. Magnetotransport properties of spin-glass-like GeSnMnTe mixed crystals with chemical composition changing in the range of 0.083
Source: Journal of Applied Physics - February 12, 2013 Category: Physics Source Type: research

Intrinsic degradation mechanism of nearly lattice-matched InAlN layers grown on GaN substrates
Guillaume Perillat-Merceroz, Gatien Cosendey, Jean-Francois Carlin, Raphael Butte, and Nicolas Grandjean Thanks to its high refractive index contrast, band gap, and polarization mismatch compared to GaN, InAlN layers lattice-matched to GaN are an attractive solution for applications such as distributed Bragg reflectors, ultraviolet light-emitting diodes, or high electron mobility transistors. In order ... [J. Appl. Phys. 113, 063506 (2013)] published Mon Feb 11, 2013.
Source: Journal of Applied Physics - February 12, 2013 Category: Physics Source Type: research

Hybrid diodes based on n-type Ge and conductive polymer doped by graphene oxide sheets with and without reduction treatment
Jian-Jhou Zeng (曾建洲) and Yow-Jon Lin (林祐仲) The authors present a hybrid diode based on n-type Ge and poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT:PSS) having the reduced graphene oxide (RGO) or graphene oxide (GO) sheets. It is found that conductivity of RGO-doped PEDOT:PSS films increases with increasing the r ... [J. Appl. Phys. 113, 064502 (2013)] published Mon Feb 11, 2013.
Source: Journal of Applied Physics - February 12, 2013 Category: Physics Source Type: research

Crystal asymmetry and low-angle grain boundary governed persistent photoinduced magnetization in small bandwidth manganites
S. Majumdar, T. Elovaara, H. Huhtinen, S. Granroth, and P. Paturi Persistent photo-induced magnetization (PPM) in low bandwidth manganite PrCaMnO (PCMO) thin film is reported in the low hole doped regime (x = 0.1). X-ray diffraction, x-ray photoelectron spectroscopy, and magnetic measurements in dark and under illumination on the as-grown, vacuum, and oxygen annea ... [J. Appl. Phys. 113, 063906 (2013)] published Mon Feb 11, 2013.
Source: Journal of Applied Physics - February 12, 2013 Category: Physics Source Type: research

Local stress determination in chromia-former thanks to micro-Raman spectroscopy: A way to investigate spontaneous delamination processes
M. Guerain, P. Goudeau, B. Panicaud, and J. L. Grosseau-Poussard Spontaneous delamination process for alpha-CrO thermal oxide films growing on NiCr-30 alloys is studied thanks to micro Raman spectroscopy. In particular, stress maps are performed through and around buckles developed on chromia films. Depending on the cooling rate at the end of the oxidation proces ... [J. Appl. Phys. 113, 063502 (2013)] published Mon Feb 11, 2013.
Source: Journal of Applied Physics - February 12, 2013 Category: Physics Source Type: research

Bouncing droplets on a billiard table
David Shirokoff In a set of experiments, Couder et al. demonstrate that an oscillating fluid bed may propagate a bouncing droplet through the guidance of the surface waves. I present a dynamical systems model, in the form of an iterative map, for a droplet on an oscillating bath. I examine the droplet bifurcation f ... [Chaos 23, 013115 (2013)] published Mon Feb 11, 2013.
Source: Chaos - February 12, 2013 Category: Physics Source Type: research

A unified model for the dynamics of driven ribbon with strain and magnetic order parameters
Ritupan Sarmah and G. Ananthakrishna We develop a unified model to explain the dynamics of driven one dimensional ribbon for materials with strain and magnetic order parameters. We show that the model equations in their most general form explain several results on driven magnetostrictive metallic glass ribbons such as the period doubli ... [Chaos 23, 013116 (2013)] published Mon Feb 11, 2013.
Source: Chaos - February 12, 2013 Category: Physics Source Type: research

Influence of surface oxidation on the valence electron energy-loss spectrum of wurtzite aluminum nitride
Michael R. S. Huang, Rolf Erni, and Chuan-Pu Liu The influence of surface oxidation on the low-loss spectrum of aluminum nitride (AlN) is investigated in electron energy-loss spectroscopy with scanning transmission electron microscopy. Contrary to intrinsic bulk AlN, oxidized AlN exhibits considerable spectral broadening both in the full width at ... [Appl. Phys. Lett. 102, 061902 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Electro-refractive effect in Ge/SiGe multiple quantum wells
We report on the electro-refractive effect in Ge/SiGe multiple quantum wells grown by low energy plasma enhanced chemical vapor deposition. The electro-refractive effect was experimentally characterized by the shift of Fabry-Perot fringes in the transmission spectra of a 64 [mu]m long slab waveguide ... [Appl. Phys. Lett. 102, 061102 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

The possibility of giant dielectric materials for multilayer ceramic capacitors
Tatsuya Ishii, Makoto Endo, Kenichiro Masuda, and Keisuke Ishida There have been numerous reports on discovery of giant dielectric permittivity materials called internal barrier layer capacitor in the recent years. We took particular note of one of such materials, i.e., BaTiO with SiO coating. It shows expressions of giant electric permittivity when processed by ... [Appl. Phys. Lett. 102, 062901 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Origin of large recoverable strain in 0.94(BiNaTiO-0.06BaTiO near the ferroelectric-relaxor transition
Hugh Simons, John E. Daniels, Julia Glaum, Andrew J. Studer, Jacob L. Jones et al. Piezoceramics of composition 0.94(BiNa)TiO-0.06BaTiO demonstrate large recoverable strain at elevated temperature (T > 75 degrees C), which is absent at room temperature. In situ neutron diffraction was used to measure changes in the crystallographic and domain structures during electric field appl ... [Appl. Phys. Lett. 102, 062902 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Gamma irradiation impact on electronic carrier transport in AlGaN/GaN high electron mobility transistors
C. Schwarz, A. Yadav, M. Shatkhin, E. Flitsiyan, L. Chernyak et al. AlGaN/GaN high electron mobility transistors were irradiated with Co gamma-rays to doses up to 1000 Gy, in order to analyze the effects of irradiation on the devices' transport properties. Temperature-dependent electron beam-induced current measurements, conducted on the devices before and after exp ... [Appl. Phys. Lett. 102, 062102 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Effect of film thickness and biaxial strain on the curie temperature of EuO
A. Melville, T. Mairoser, A. Schmehl, T. Birol, T. Heeg et al. The effects of film thickness and epitaxial strain on the magnetic properties of commensurate EuO thin films grown on single crystalline (001) yttria-stabilized zirconia (YSZ) and (110) LuAlO substrates are presented. Magnetic measurements show a reduction in the Curie temperature (T) for EuO/YSZ fi ... [Appl. Phys. Lett. 102, 062404 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Reversal process of a magnetic vortex core under the combined action of a perpendicular field and spin transfer torque
N. Locatelli, A. E. Ekomasov, A. V. Khvalkovskiy, Sh. A. Azamatov, K. A. Zvezdin et al. In a nanopillar with dipolarly coupled vortices, we present an experimental and simulation study to understand how the interplay between the bias field and spin transfer torque impacts reversal of the vortex cores. We find that, depending on the current values, vortex cores might experience differen ... [Appl. Phys. Lett. 102, 062401 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Noncontact and simultaneous measurement of the d and d piezoelectric strain coefficients
Mohammad H. Malakooti and Henry A. Sodano Here, digital image correlation is demonstrated to be an accurate tool for the noncontact, non-destructive, and rapid characterization of the converse effect of piezoelectric materials. The longitudinal (d) and transverse (d) piezoelectric strain coefficients of lead zirconate titanate-5H wafers are ... [Appl. Phys. Lett. 102, 061901 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

P(VDF-TrFE-CFE) terpolymer thin-film for high performance nonvolatile memory
Xin Chen, Lu Liu, Shi-Zheng Liu, Yu-Shuang Cui, Xiang-Zhong Chen et al. Vinylidene fluoride-trifluoroethylene-chlorofluoroethylene terpolymer, P(VDF-TrFE-CFE), with small amount of CFE is utilized for thin-film nonvolatile memory. Polarization switching voltage for a 50 nm-thick film can be as low as 1 V, and is well suited for integrated driving electronics. The writin ... [Appl. Phys. Lett. 102, 063103 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Bi doping modulating structure and phase-change properties of GeTe nanowires
Jie Zhang, Rong Huang, Lin Shi, Long Wang, Fenfen Wei et al. Bi-doped GeTe nanowires were fabricated using chemical vapor deposition. Composition and microstructure characterizations indicated that Bi (~3 at. %) doping preserved GeTe rhombohedral structure with slight X-ray diffraction peak shifts, implying material parameters variation. A doping model was pr ... [Appl. Phys. Lett. 102, 063104 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Terahertz emission from GaAs-AlGaAs core-shell nanowires on Si (100) substrate: Effects of applied magnetic field and excitation wavelength
Jasher John Ibanes, Ma. Herminia Balgos, Rafael Jaculbia, Arnel Salvador, Armando Somintac et al. Terahertz (THz) emission from GaAs-AlGaAs core-shell nanowires (CSNW) on silicon (100) substrates was investigated using THz time-domain spectroscopy. The applied magnetic field polarity dependence strongly suggests that THz emission originated from photo-carriers in the CSNWs. Optical excitation of ... [Appl. Phys. Lett. 102, 063101 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Lanthanide impurities in wide bandgap semiconductors: A possible roadmap for spintronic devices
G. Caroena, W. V. M. Machado, J. F. Justo, and L. V. C. Assali The electronic properties of lanthanide (from Eu to Tm) impurities in wurtzite gallium nitride and zinc oxide were investigated by first principles calculations, using an all electron methodology plus a Hubbard potential correction. The results indicated that the 4f-related energy levels remain outs ... [Appl. Phys. Lett. 102, 062101 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Intrinsic spin noise in MgO magnetic tunnel junctions
F. Delgado, K. Lopez, R. Ferreira, and J. Fernandez-Rossier We consider two intrinsic sources of noise in ultra-sensitive magnetic field sensors based on MgO magnetic tunnel junctions, coming both from Mg nuclear spins (I = 5/2, 10% natural abundance) and S = 1 Mg-vacancies. While nuclear spins induce noise peaked in the MHz frequency range, the vacancies no ... [Appl. Phys. Lett. 102, 063102 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Hole doping of graphene supported on Ir(111) by AlBr
N. A. Vinogradov, K. A. Simonov, A. A. Zakharov, J. W. Wells, A. V. Generalov et al. In this letter, we report an easy and tenable way to tune the type of charge carriers in graphene, using a buried layer of AlBr and its derivatives on the graphene/Ir(111) interface. Upon the deposition of AlBr on graphene/Ir(111) and subsequent temperature-assisted intercalation of graphene/Ir(111) ... [Appl. Phys. Lett. 102, 061601 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Ferromagnetic resonance study of dual exchange bias field behavior in NiFe/IrMn/Co trilayers
M. Tafur, M. A. Sousa, F. Pelegrini, V. P. Nascimento, and E. Baggio-Saitovitch Magnetometry study of magnetron sputtered NiFe/IrMn/Co trilayers reveal that the exchange bias field at the NiFe/IrMn interface decreases with increasing NiFe layer thickness, up to 150 A. At the IrMn/Co interface, a decrease also occurs when the NiFe layer thickness increases. Ferromagnetic resonan ... [Appl. Phys. Lett. 102, 062402 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

High performance InGaZnO thin film transistor with InGaZnO source and drain electrodes
Hung-Chi Wu and Chao-Hsin Chien This work demonstrates In-Ga-Zn-O (IGZO) as source and drain electrodes in IGZO-thin film transistors (TFTs). The fabricated TFT depicts excellent electrical properties; its mobility is 18.02 (cm/V s), threshold voltage (V) is 0.3 (V), on/off ratio is 1.63 x 10 and subthreshold swing (S.S.) is 239 ... [Appl. Phys. Lett. 102, 062103 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Structure of epitaxial L1-FePt/MgO perpendicular magnetic tunnel junctions
Amit Kohn, Nadav Tal, Ayala Elkayam, Andras Kovacs, Dalai Li et al. Perpendicular magnetic tunnel junctions (p-MTJs) with MgO barriers are interesting for high-density information-storage devices. Chemically ordered L1-FePt is a potential electrode due to its large perpendicular magnetocrystalline anisotropy. To-date, a single theoretical study on L1-FePt/MgO p-MTJ ... [Appl. Phys. Lett. 102, 062403 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Thermoacoustic resonance effect and circuit modelling of biological tissue
Fei Gao, Yuanjin Zheng, Xiaohua Feng, and Claus-Dieter Ohl In this letter, thermoacoustic resonance effect is predicted from theoretical analysis with series resistor-inductor-capacitor resonance circuit model and then observed experimentally using muscle tissue illuminated by multi-pulse microwave source. Through model fitting, the circuit parameters are e ... [Appl. Phys. Lett. 102, 063702 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Referee Acknowledgment for 2012
Nghi Q. Lam Abstract not available. [Appl. Phys. Lett. 102, 069801 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Diffusion tensor imaging using a high-temperature superconducting resonator in a 3 T magnetic resonance imaging for a spontaneous rat brain tumor
This study investigates the peri-tumor signal abnormalities of a spontaneous brain tumor in a rat by using a 4 cm high-temperature superconducting (HTS) surface resonator. Fractional anisotropy (FA) values derived from diffusion tensor imaging reflect the interstitial characteristic of the peri-lesi ... [Appl. Phys. Lett. 102, 063701 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Defect states characterization of non-annealed and annealed ZrO/InAlN/GaN structures by capacitance measurements
P. Kordos, R. Stoklas, D. Gregusova, K. Husekova, J.-F. Carlin et al. InAlN/GaN metal-oxide-semiconductor structures with non-annealed and annealed ZrO gate insulators were characterized by capacitance-voltage (CV) measurements. A significant capacitance hysteresis in both channel depletion and barrier accumulation regions was observed on the non-annealed structures. ... [Appl. Phys. Lett. 102, 063502 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Sub-volt broadband hybrid plasmonic-vanadium dioxide switches
Arash Joushaghani, Brett A. Kruger, Suzanne Paradis, David Alain, J. Stewart Aitchison et al. The insulator-metal phase transition of a correlated-electron material, vanadium dioxide, is used to demonstrate electrically controlled, compact, broadband, and low voltage plasmonic switches. The devices are micron-scale in length and operate near a wavelength of 1550 nm. The switching bandwidths ... [Appl. Phys. Lett. 102, 061101 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Origin of variation in switching voltages in threshold-switching phenomena of VO thin films
S. B. Lee, K. Kim, J. S. Oh, B. Kahng, and J. S. Lee We investigated the origin of the variation in switching voltages in threshold-switching of VO thin films. When a triangular-waveform voltage signal was applied, the current changed abruptly at two switching voltages, i.e., V (insulator-to-metal) and V (metal-to-insulator). V and V were measured by ... [Appl. Phys. Lett. 102, 063501 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Identifying the efficient inter-conversion between singlet and triplet charge-transfer states by magneto-electroluminescence study
Ping Chen, Qiming Peng, Liang Yao, Na Gao, and Feng Li Using the magneto-electroluminescence (MEL) as a tool, we demonstrated the efficient inter-conversion between singlet and triplet charge-transfer (CT) states in exciplex-based organic light-emitting diodes (OLEDs). Results show that the MEL of exciplex-based device is larger than that of exciton-bas ... [Appl. Phys. Lett. 102, 063301 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Al-doped ZnO thin-film transistor embedded micro-cantilever as a piezoresistive sensor
Prasenjit Ray and V. Ramgopal Rao In this work, an aluminium-doped zinc oxide (AZO) thin film transistor, embedded in a polymer micro-cantilever, is demonstrated for nano-mechanical sensing applications. This device senses the surface stress due to a change in the carrier mobility of the semi-conducting layer. Due to the low Young's ... [Appl. Phys. Lett. 102, 064101 (2013)] published Mon Feb 11, 2013.
Source: Applied Physics Letters - February 12, 2013 Category: Physics Source Type: research

Robust interferometric frequency lock between cw lasers and optical frequency combs
A transfer interferometer is presented which establishes a versatile and robust optical frequency locking link between a tunable single frequency laser and an optical frequency comb. It enables agile and continuous tuning of the frequency difference between both lasers while fluctuations and drift ...
Source: Optics Letters - February 12, 2013 Category: Physics Authors: Erik BenklerFelix RohdeHarald R. Telle Source Type: research

Flattened comb generation using only phase modulators driven by fundamental frequency sinusoidal sources with small frequency offset
We propose and experimentally demonstrate a simple scheme to generate flattened optical subcarriers at low insertion loss using only phase modulators driven by fundamental frequency sinusoidal sources. A small frequency offset is introduced in the second stage to obtain phase-insensitive, stable, ...
Source: Optics Letters - February 12, 2013 Category: Physics Authors: Junwen ZhangJianjun YuNan ChiZe DongXinying LiYufeng ShaoJianguo YuLi Tao Source Type: research

Spontaneous inelastic Rayleigh scattering in optical fibers
Rayleigh scattering (RS) adds noise to signals that are transmitted over optical fibers and other optical waveguides. This noise can be the dominant noise source in a range between 10 Hz and 100 kHz from the carrier and can seriously degrade the performance of optical systems that require ...
Source: Optics Letters - February 12, 2013 Category: Physics Authors: Olukayode OkusagaJames P. CahillAndrew DochertyCurtis R. MenyukWeimin Zhou Source Type: research

Object authentication in computational ghost imaging with the realizations less than 5% of Nyquist limit
Ghost imaging has attracted much attention, in which the object can be reconstructed by using the correlation of intensity fluctuations. It is well known that a large number of realizations (such as 5000 or even 20,000) are usually required for object reconstructions in ghost imaging. In this ...
Source: Optics Letters - February 12, 2013 Category: Physics Authors: Wen Chen Xudong Chen Source Type: research

Brillouin lasing in integrated liquid-core optical fibers
We report Brillouin lasing in an integrated liquid-core optical fiber filled with neat CS_2. This is the first observation of Brillouin lasing in an optical fiber filled with a liquid, to the best of our knowledge. The linewidth of the single frequency liquid-based Brillouin laser was estimated to ...
Source: Optics Letters - February 12, 2013 Category: Physics Authors: K. KieuD. ChurinL. SchneebeliR. A. NorwoodN. Peyghambarian Source Type: research

Genetic method to optimize binary dithering technique for high-quality fringe generation
The recently proposed dithering techniques could substantially improve measurement quality when fringes are wide, but offer limited improvement when fringes are narrow. This Letter presents a genetic algorithm to optimize the dithering technique for sinusoidal structured pattern representation. We ...
Source: Optics Letters - February 12, 2013 Category: Physics Authors: William Lohry Song Zhang Source Type: research

Filamentation of arbitrary polarized femtosecond laser pulses in case of high-order Kerr effect
We developed a model of femtosecond filamentation which includes high-order Kerr effect and an arbitrary polarization of a laser pulse. We show that a circularly polarized pulse has maximum filament intensity. Also, we show that, independently of the initial pulse polarization, the value of a ...
Source: Optics Letters - February 12, 2013 Category: Physics Authors: Nikolay A. PanovVladimir A. MakarovVladimir Y. FedorovOlga G. Kosareva Source Type: research

Randomly displaced phase distribution design and its advantage in page-data recording of Fourier transform holograms
For Fourier transform holography, an effective random phase distribution with randomly displaced phase segments is proposed for obtaining a smooth finite optical intensity distribution in the Fourier transform plane. Since unitary phase segments are randomly distributed in-plane, the blanks give ...
Source: Applied Optics - February 12, 2013 Category: Physics Authors: Akira Emoto Takashi Fukuda Source Type: research

Flexible near-infrared diffuse optical tomography with varied weighting functions of edge-preserving regularization
In this paper, a flexible edge-preserving regularization algorithm based on the finite element method is proposed to reconstruct the optical-property images of near-infrared diffuse optical tomography. This regularization algorithm can easily incorporate with varied weighting functions, such as a ...
Source: Applied Optics - February 12, 2013 Category: Physics Authors: Liang-Yu ChenMin-Cheng PanMin-Chun Pan Source Type: research

Low-loss high-speed speckle reduction using a colloidal dispersion
We present a simple and robust approach to reduce laser speckle, which has limited the adoption of lasers in imaging and display applications. We use colloidal solutions that can quickly reduce speckle contrast due to the Brownian motion of the scattering particles. The high insertion loss ...
Source: Applied Optics - February 12, 2013 Category: Physics Authors: Brandon ReddingGraham AllenEric R. DufresneHui Cao Source Type: research

All-fiber time-delay spectrometer for simultaneous spectral and temporal laser pulse characterization in the nanosecond range
We have realized a modified time-delay spectrometer based on a step-chirped fiber Bragg grating array. This method allows simultaneous spectral and temporal characterization of pulsed light sources in the nanosecond regime, which can also be applied to the investigation of single pulses. With a ...
Source: Applied Optics - February 12, 2013 Category: Physics Authors: Tobias TiessManfred RothhardtMatthias JägerHartmut Bartelt Source Type: research

PMD correlation properties in the hinge model
We demonstrate that within the framework of the hinge model, the polarization mode dispersion (PMD) vector correlation function averaged over time and wavelength is only appreciably affected by the position of the last hinge. Further, the correlation function width is found within the context of a ...
Source: Journal of the Optical Society of America A - February 12, 2013 Category: Physics Authors: George Soliman David Yevick Source Type: research

Searching for magnetic monopoles in polar rocks
Method advantageous for a range of monopole masses and charges
Source: PhysicsWeb News - February 12, 2013 Category: Physics Source Type: news

Update: Have BIO2010 Goals Been Achieved?
Leaders in biology education are celebrating the progress made since the publication of BIO2010: Transforming Undergraduate Education for Future Research Biologists. The landmark report, published in 2003 by the National Research Council (NRC), called on institutions of higher education to revamp both the curricula and teaching methods in the life sciences to meet the challenges of the 21st century. BIO2010 urged much deeper connections between the biological sciences and mathematics, the physical sciences, and computer science. In addition, the report called on faculty to move out of the lecture hall and into the field a...
Source: Eye on Education - February 12, 2013 Category: Biology Authors: BioScience Source Type: news

Discovering the Biology Education Research Community
When Sarah Eddy began work on her doctoral thesis, she assumed that her main contribution would relate to her field of study—behavioral ecology and the sexual selection of salamanders—but one of her more significant discoveries had nothing to do with amphibians and everything to do with what was going on in the classroom. As a graduate teaching assistant at Oregon State University, she realized how important it was to her to see students truly improve their learning. "It was in trying to figure out how to help students achieve more that I discovered education research literature," she explained. Many biologists...
Source: Eye on Education - February 12, 2013 Category: Biology Authors: BioScience Source Type: news

Impacts of underwater turbulence on acoustical and optical signals and their linkage
Acoustical and optical signal transmission underwater is of vital interest for both civilian and military applications. The range and signal to noise during the transmission, as a function of system and water optical properties, in terms of absorption and scattering, determines the effectiveness of ...
Source: Optics Express - February 12, 2013 Category: Physics Authors: Weilin HouEwa JaroszSarah WoodsWesley GoodeAlan Weidemann Source Type: research