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中国科学院大连化学物理研究所揭示无机/有机界面三线态能量转移的“Through-space”与“Through-bond”机制（图）
无机/有机界面 三线态 能量转移 Through-space Through-bond 机制
2020/8/24
近日，中国科学院大连化学物理研究所光电材料动力学特区研究组研究员吴凯丰团队，通过同时调控无机半导体纳米晶的波函数分布和表面受体分子的构型，采用时间分辨光谱，观测到无机/有机界面三线态能量转移中的“Through-space”与“Through-bond”机制，并基于此实现高效的分子三线态敏化和三线态湮灭的光子上转换。近年来，无机纳米晶到有机分子的三线态能量转移被发展为一种新型、高效的分子三线态敏化...
近日，北京大学地球与空间科学学院宗秋刚教授与邹鸿副教授领导的联合团队受邀为Space Weather杂志撰写论文，介绍团队自主研发的北大-成像电子谱仪及其科学价值。该文被Space Weather杂志遴选为当期专题文章（Featured Article）并登上封面。北大-成像电子谱仪（BD-IES）是北京大学空间物理与应用技术研究所自主研发的新一代空间科学载荷，其设计新颖、测量可靠，高能量与时空分...
SPACE-BORNE LASER ALTIMETER GEOLOCATION ERROR ANALYSIS
Laser altimetry Error analysis Footprints Pointing angle Range Geolocation accuracy
2018/6/5
This paper reviews the development of space-borne laser altimetry technology over the past 40 years. Taking the ICESAT satellite as an example, a rigorous space-borne laser altimeter geolocation model...
2017SPIE高级自由空间光通信技术与应用专题会议（Advanced Free-Space Optical Communication Techniques and Applications）
2017 SPIE 高级自由空间光通信技术与应用 专题会议
2017/4/25
Free-space optical communication provides high-capacity data links for defence and security. This conference will provide a forum for all professionals involved with both short and long range free-spa...
TOWARDS A 3D TRUE COLORED SPACE BY THE FUSION OF LASER SCANNER POINT CLOUD AND DIGITAL PHOTOS
: Laser Scanning Digital Photogrammetry Data Fusion True Color 3D model Cultural Heritage
2015/8/7
The fusion of the laser scanner data, with its very rich point cloud, and the digital image, with its very detailed information about the
radiometric characteristics, to produce optimum 3D model, no...
ROADM System for Space Division Multiplexing with Spatial Superchannels
ROADM System Space Division Multiplexing Spatial Superchannels
2014/11/6
A two-span SDM system includes the first ROADM supporting spatial superchannels and the first cladding-pumped multicore-EDFA directly spliced to multicore transmission fiber.For 6 ×40 ×128-Gb/s SDM-WD...
Few-Photon Single-Atom Cavity QED With Input-Output Formalism in Fock Space
Atom optics cavity resonators nanophotonics optical switches optical waveguide
2015/8/7
The Jaynes–Cummings (JC) system, which describes the interaction between a cavity and a two-level atom, is one of the most important systems in quantum optics. We obtain analytic solutions for the one...
This paper presents the problem of the current separate treatment of levels of detail in city models. We propose a solution, detail the main principles, and present our initial results on the approach...
Binary Phase Micro-Grating and Polarization Beam Splitter for Free-Space Micro Optical Pickups
2011/11/24
A pop-up binary-phase micrograting and a pop-up micro polarization beamsplitter, for potential use in micro-optical pickups, have been realized on a single silicon chip using a two-layer polysilicon a...
New Ground-to-Train High-Speed Free-Space Optical Communication System with Fast Handover Mechanism
Free-space optical communication Scanners
2015/5/26
We developed a new ground-to-train free-space optical communication system that performs stable high-speed communication even when a train is running at high speed and does fast handover between laser...
Design-Space Exploration for CMOS Photonic Processor Networks
Optical interconnects Photonic integrated circuits
2015/6/10
Monolithically integrated dense WDM photonic network topologies optimized for loss and power footprint of optical components can achieve up to 4x better energy-efficiency and throughput than electrica...
Characterization of a MEMS Based Optical System for Free-Space Board-to-Board Optical Interconnects
Free-space optical communication Alignment
2015/6/9
We demonstrate alignment of an array of VCSELs to detectors, using a MEMS-based lens system for free-space board-to-board optical interconnects. Our optical system is capable of aligning up to 5 degre...
Wavelength-space permutation switch with coherent PDM QPSK transmission for supercomputer optical interconnects
Optical interconnects Coherent communications
2015/6/4
We experimentally study the performance of an economically-viable, high-capacity supercomputer optical interconnect employing wavelength-space optical packet switching,polarization division multiplexe...
Tunable Free Space Optical Delay Interferometer for Demodulation of Differential Phase Shift Keying Signals
Phase modulation Interferometry
2015/6/4
With a continuously tunable free space optical delay interferometer and direct detection D(Q)PSK signals can be received at varying symbol rates or under optimized conditions. The in-terferometer’s ph...
Higher-order space charge field effects on the self-deflection of bright screening spatial solitons in two-photon photorefractive crystals
non-linear optics two-photon photorefractive effect bright screening spatial solitons self-deflection
2011/5/9
We investigate the effects of higher-order space charge field on the self-deflection of bright
screening spatial solitons due to two-photon photorefractive effects by a numerical method
under steady...