检索结果-南通市图书馆

Silicon slow light photonic crystals structures:present achievements and future trends

在线全文

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2011年第3期4卷 243-253页

作者： Eric CASSAN Xavier LE ROUX Charles CAER Ran HAO Damien BERNIER Delphine MARRIS-MORINI Laurent VIVIEN Institut d'Electronique Fondamentale Université Paris-Sud CNRS UMR 8622

Slow light in planar photonic structures has attracted for some years an increasing interest due to amazing physical effects it allows or reinforces and to the degrees of freedom it raises for designing new optical functions. Controlling light group velocity is achieved through the use of periodical optical media obtained by nano-structuration of semiconductor wafers at the scale of light wavelength: the so-called photonic crystals. This article reviews present achievements realized in the field of slow light photonic bandgap structures, including the physical principles of slow light to the description of the most advanced integrated optical devices relying on *** and current hot topics related to slow light are discussed to highlight the balance between the advantages and drawbacks of using slow waves in integrated photonic structures. Then, future trends are described, which is focused on the use of slow wave slot waveguides for nonlinear optics and bio-photonic applications.

关键词： slow light photonic crystals silicon photonics integrated optical devices

Kinetics study of the solvated electron decay in THF using laser-synchronised picosecond electron pulse

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2007年第1期18卷 10-15页

作者： Vincent De WAELE Sébastien SORGUES Pascal PERNOT Jean-Louis MARIGNIER Mehran MOSTAFAVI Laboratoire de Chimie Fhysique/ELYSE UMR CNRS/UPS 8000Bt.349Université Paris-Sud91405 OrsayFrance

Picosecond pulse radiolysis of neat tetrahydrofuran (THF) shows a fast decay of the solvated electron within *** decay of the solvated electron observed at 790nm is because of spur reaction.A numerical simulation using time dependent Smoluchowski equation containing a sink term with a distance dependent reaction rate is used to fit the pulse-probe data and shows that the geminate reaction can proceed at long distance in this low polar solvent.

关键词：溶剂化电子衰减四氢呋喃激光同步化皮秒电子脉冲

Dispersive Blow-Up Ⅱ.Schrdinger-Type Equations,Optical and Oceanic Rogue Waves

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2010年第6期31卷 793-818页

作者： Jerry L.BONA Jean-Claude SAUT Department of Mathematics Statistics and Computer Science University of Illinois at Chicago Laboratoire de Mathématiques UMR 8628 Université Paris-Sud et CNRS

Addressed here is the occurrence of point singularities which owe to the focusing of short or long waves, a phenomenon labeled dispersive blow-up. The context of this investigation is linear and nonlinear, strongly dispersive equations or systems of equations. The present essay deals with linear and nonlinear Schrdinger equations, a class of fractional order Schrdinger equations and the linearized water wave equations, with and without surface tension. Commentary about how the results may bear upon the formation of rogue waves in fluid and optical environments is also included.

关键词： Rogue waves Dispersive blow-up Nonlinear dispersive equations Nonlinear Schrdinger equation Water wave equations Propagation in optical cables Weak turbulence models

Characterization of planar photonic crystals using surface coupling techniques at large wavelengths

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2007年第9期5卷 501-503页

作者： Y.Benachour N.Paraire C.N.R.S. UniversitéParis-Sud 11Institut d'Electronique FondamentaleBt.220-91405Orsay CedexFrance

We report a non-destructive characterization of planar two-dimensional （2D） photonic crystals （PhCs） made in silicon on insulator （SOI） wafers using ellipsometric or Fourier transformed infrared （FTIR） spectroscope. At large wavelengths, devices behave as homogeneous isotropic materials defined by an effective filling factor. The experimental results related to the PhC limited dimensions confirm this characterization.

关键词： Characterization of planar photonic crystals using surface coupling techniques at large wavelengths

Ultra-compact on-chip metaline-based 1.3/1.6 μm wavelength demultiplexer

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2019年第3期7卷 359-362页

作者： YULONG FAN XAVIER LE ROUX ANATOLE LUPU ANDRé DE LUSTRAC Centre de Nanosciences et de Nanotechnologies CNRS Université Paris-Sud Université Paris-Saclay université paris Lumières Univ Paris Nanterre

In this paper, we report an experimental demonstration of enabling technology exploiting resonant properties of plasmonic nanoparticles, for the realization of wavelength-sensitive ultra-minituarized(4 μm× 4 μm) optical metadevices. To this end, the example of a 1.3/1.6 μm wavelength demultiplexer is considered. Its technological implementation is based on the integration of gold cut-wire-based metalines on the top of a silicon-on-insulator waveguide. The plasmonic metalines modify locally the effective index of the Si waveguide and thus allow for the implementation of wavelength-dependent optical pathways. The 1.3/1.6 μm wavelength separation with extinction ratio between two demultiplexers' channels reaching up to 20 dB is experimentally demonstrated. The considered approach, which can be readily adapted to different types of material planar lightwave circuit platforms and nanoresonators, is suited for the implementation of a generic family of wavelength-sensitive guided-wave optical metadevices.

关键词： experimental optical lightwave is Its can dB be

Gate length dependent transport properties of in-plane core-shell nanowires with raised contacts

在线全文

学校读者我要写书评

暂无评论

Nano Research 2020年第1期13卷 61-66页

作者： Alexandre Bucamp Christophe Coinon David Troadec Sylvie Lepilliet Gilles Patriarche Xavier Wallart Ludovic Desplanque Univ.Lille CNRSCentrale LilleYncréa ISENUniv.Polytechnique Hauts-de-FranceUMR 8520-IEMNF-59000LilleFrance C2N-UMR 9001 CNRS UniversitéParis-Sud-UniversitéParis-Saclay91120PalaiseauFrance

Three-dimensional(3D)nanoscale crystal shaping has become essential for the precise design of advanced electronic and quantum devices based on electrically gated *** this context,Ⅲ-Ⅴ semiconductor-based nanowires with low electron effective mass and strong spin-orbit coupling are particularly investigated because of their exceptional quantum transport properties and the good electrostatic control they *** the main challenges involved in the processing of these nanodevices are(i)the management of the gate stack which requires ex-situ passivation treatment to reduce the density of traps at the oxide/semiconductor interface,(ii)the ability to get good ohmic contacts for source and drain electrodes and(iii)the scalability and reliability of the process for the fabrication of complex architectures based on nanowire *** this paper,we show that selective area molecular beam epitaxy of in-plane InGaAs/InP core-shell nanowires with raised heavily doped source and drain contacts can address these different *** characterization of the devices down to 4 K reveals the positive impact of the InP shell on the gate electrostatic control and effective electron *** comparable to the best reported values for In(Ga)As nanostructures grown on InP,this latter is severely reduced for sub-100 nm channel highlighting remaining issue to reach the ballistic regime.

关键词： molecular beam epitaxy core-shell nanowire selective area growth effective electron mobility

MULTIFRACTAL FORMALISMS:BOXED VERSUS CENTERED INTERVALS

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Analysis in Theory and Applications 2003年第4期19卷 332-341页

作者： Jacques Peyriére université paris-sud

There are mainly two approaches to the multifractal analysis of measures. The first one,which is used in applications and in studying problems arising from dynamical systems,uses a hierarchy of boxes. The second one,which is more satisfactory from the viewpoint of geometric measure theory,uses more intrinsic concepts. This article is an account of a work by ***,*** Nasr,and ***ére [3] which provides a bridge between these two theories.

关键词： multifractal c-adic interval Hausdorff dimension packing dimension

On the Proper Homotopy Invariance of the Tucker Property

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2007年第3期23卷 571-576页

作者： Daniele Ettore OTERA universitádi Palermo Dipartimento di Matematica ed Applicazionivia Archirafi 3490123-PalermoItaly and Université Paris-SudMathématiquesBt 42591405 Orsay Cedex-France

A non-compact polyhedron P is Tucker if, for any compact subset K begong to P, the fundamental group π1 （P - K） is finitely generated. The main result of this note is that a manifold which is proper homotopy equivalent to a Tucker polyhedron is Tucker. We use Poenaru＇s theory of the equivalence relations forced by the singularities of a non-degenerate simplicial map.

关键词： proper homotopy Φ/ψ-theory tucker property

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1994年第3期11卷 177-180页

作者： LU Wei LIU Pulin SHEN Xuechu M.von Ortenberg J.Tuchendler J.P.Renard National Laboratory for Infrared Physics Academia SinicaShanghai 200083 Humboldt university BerlinF.P.Germany Laboratoire de Dispositiofs Infrarouge et Micro-Ondes UniversitêParis VIParisFrance Institut d Electronique Fondamentale UniversitêParis-SudF-91405 OrsayFrance

Some fundamental properties are found for the singlet ground state and lowest triplet excited state in the spin s=1 linear chain Heisenberg antiferromagnet with arbitrary chain *** influence of the anisotropic term on these states is evaluated by spin polarization on the site of the *** energy levels based on these analyses are in good agreement with the experimental spectroscopes.

关键词： Heisenberg excited arbitrary