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The peculiar coupling of the spin and the valley degrees of freedom in Transition-Metal Dichalcogenides (TMDs) makes this class of materials very interesting for quantum information and possible valleytronics based devices [1]. In the last year the valley depolarization dynamics in TMDs has been object of an intense study [2, 3, 4, 5].
In this paper, we present simulation and experimental studies of localization and source separation for a bio-complexity bird study based on a new wireless acoustic array node named Voxnet. The Approximate Maximum Likelihood (AML) method is used to estimate blindly the direction-of-arrivals (DOAs) of sources which can be used to both locate the sources using a DOA-based localization method and generate...
We investigate the performance of a fiber-based OFDM transmission system for wireless backhauling with a target data rate of 2.5…10 Gbit/s using directly modulated lasers. Newly developed semiconductor DFB lasers in index and complex coupled curved stripe technology as well as lasers with ridge waveguide resonators were experimentally characterized and found to be suitable for direct modulation at...
Third harmonic generation by a femtosecond probe intersecting a laser-induced air plasma is measured and a general model developed to describe such signal. The electron density distribution and nonlinear coefficient of the plasma are determined.
Speckle images are used to form speckle intensity spatial correlations over incident light position. These correlations allow the reconstruction of the field incident on and transmitted through a heavily scattering medium.
We attempted to grow CLBO crystals in dry atmophere. We estimated the OH impurities in the crystal by non-polarized Fourier transform infrared spectrometer and measured the laser damage tolerance by 266-nm high repetition pulse laser.
We demonstrate that imaging through thick random media can be facilitated by intensity correlations with respect to input beam location. Example results suggest that the approach could lead to new imaging opportunities.
Dynamics of tungsten wire-array Z-pinch implosions driven by a current of 3 MA has been studied on the Angara-5-1 facility by using a UV laser probe developed in the Institute of Nuclear Physics and Chemistry. The single-wire-array results including implosion trajectory, an implosion velocity of 3.7 X 107 cm/s, and a minimum pinch size of no more than 0.9 mm were obtained. The numerical analysis indicates...
Second and third order frequency correlations of speckle intensity patterns are used to characterize scattering media for multiple polarization states.
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