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近日，电子信息（微纳技术）学院青年教师杨振宇博士在Nature Index著名学术期刊《Applied Physics Letters》上发表了题为“The photovoltaic and photoconductive photodetector based on GeSe/2D semiconductor van der Waals heterostructure”的研究论文。该论文被编辑选...
THEORETICAL MODELLING STUDY ON THE RELATIONSHIP BETWEEN MULTI-FREQUENCY MICROWAVE VEGETATION INDEX AND VEGETATION PROPERTIES (OPTICAL DEPTH AND SINGLE SCATTERING ALBEDO)
Microwave Vegetation Index Matrix Doubling Model Optical Depth Single Scattering Albedo Soil Moisture Roughness
2018/5/15
This paper presents a theoretical study of derivation Microwave Vegetation Indices (MVIs) in different pairs of frequencies using two methods. In the first method calculating MVI in different frequenc...
The experimental set-valued index of refraction of dielectric and anelastic media
dielectric anelastic splitting index of refraction
2015/9/28
The dielectric parameter, in the generalised Debye form, of all studied substances (Cole and Cole, 1941) contains a rational power of the imaginary frequency which implies that the index of refraction...
Active Negative Index Metamaterial Powered by an Electron Beam
Active Negative Index Metamaterial Electron Beam Optics
2012/5/17
A novel active negative index metamaterial that derives its gain from an electron beam is intro- duced. The metamaterial consists of a stack of equidistant parallel metal plates perforated by a period...
Low-loss amorphous Si waveguides with gradient refractive index cladding structure
Low-loss amorphous waveguides gradient refractive index cladding structure
2013/7/3
Amorphous Si waveguides with gradient refractive index cladding structure are proposed and fabricated using plasma-enhanced chemical vapor deposition method. Compared with 6 dB/cm for ridge waveguide ...
Experimental investigation on the scintillation index of vortex beams propagating in simulated atmospheric turbulence
Experimental investigation scintillation index vortex beams propagating simulated atmospheric turbulence
2013/7/3
The scintillation index of vortex beam in simu-lated atmospheric turbulence is experimentally investigated.The fluctuation of the intensity can be effectively reduced by vortex beams. In particular, t...
A copper negative index metamaterial in the visible / near-infrared
copper negative index visible near-infrared Optics
2011/8/11
Abstract: We propose a design for a novel plasmonic copper metamaterial with an index of refraction equal to -1 at an operating wavelength of 700 nm. Using numerical simulations, we demonstrate negati...
Solitons in thermal media with periodic modulation of linear refractive index
thermal media periodic modulation linear refractive index
2011/9/6
We address the existence and the properties of solitons in thermal media with periodic distribution of two different linear refractive indices. Many kinds of
solitons in such optical lattices, includ...
Analytic evaluation of diffuse flux at a refractive index discontinuity in forward-biased scattering media
Analytic evaluation forward-biased scattering media
2011/8/26
A simple analytic method of estimating the error involved in using an approximate boundary condition for diffuse radiation in two adjoining scattering media with differing refractive index is presente...
Controlling the second-harmonic in a phase matched negative-index metamaterial
second-harmonic negative-index Nonlinear metamaterials (NLMMs)
2011/8/26
Nonlinear metamaterials (NLMMs) have been predicted to support new and exciting domains in the manipulation of light, including novel phase matching schemes for wave mixing. Most notable is the so-cal...
Index Theorem and Overlap Formalism with Naive and Minimally Doubled Fermions
Index Theorem Overlap Formalism Naive
2010/12/24
We present a theoretical foundation for the Index theorem in naive and minimally doubled lattice fermions by studying the spectral flow of a Hermitean version of Dirac operators. We utilize the point...
Running Spectral Index from Inflation with Modulations
Running Spectral Index Inflation Modulations
2010/12/27
We argue that a large negative running spectral index, if confirmed, might suggest that there are abundant structures in the inflaton potential, which result in a fairly large (both positive and negat...
I propose a method for measuring the Witten index using a lattice simulation. The index is useful to discuss spontaneous breaking of supersymmetry. As a test of the method, I also report some numerica...
Index Theorem and Overlap Formalism with Naive and Minimally Doubled Fermions
Index Theorem Overlap Formalism Naive
2011/1/6
We present a theoretical foundation for the Index theorem in naive and minimally doubled lattice fermions by studying the spectral flow of a Hermitean version of Dirac operators. We utilize the point ...
On the Superconformal Index of N=1 IR Fixed Points: A Holographic Check
Superconformal Index N=1 IR Fixed Points
2010/12/24
We evaluate the superconformal index of the Y^{p,q} quiver gauge theories using Romeslberger's prescription. For the conifold quiver Y^{1,0} we find exact agreement at large N with a previous calculat...