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Organic light-emitting diodes using 3,6-difluoro-2,5,7,7,8,8- hexacyanoquinodimethane as p -type dopant

Applied Physics Letters 2009年第7期94卷

作者： Mi, Bao Xiu Gao, Zhi Qiang Cheah, Kok Wai Chen, Chin H. Jiangsu Engineering Center for Flat-Panel Displays and Solid-State Lighting Nanjing University of Posts and Telecommunications JiangSu 210046 China Department of Physics Centre for Advanced Luminescence Materials Hong Kong Baptist University Hong Kong Hong Kong Display Institute Microelectronics and Information Systems Research Center National Chiao Tung University Hsinchu 300 Taiwan

We demonstrate that 3,6-difluoro-2,5,7,7,8,8-hexacyanoquinodimethane (F2-HCNQ) can serve as an excellent electrical doping material for hole transport materials with the highest occupied molecular orbital level as high as 5.4 eV, such as N, N -di(naphthalene-1-yl)- N, N -diphenyl-benzidine (NPB). With its relatively strong electron-accepting ability and high thermal stability, F2-HCNQ doped NPB organic light-emitting diode (OLED) showed improved power efficiency with low driving voltage. The tris(8-hydroxyquinoline)aluminum based OLED with F2-HCNQ doped NPB layer and Cs2O doped bathophenanthroline electron transport layer exhibits power efficiency of 3.6 lm/W with driving voltage of 3.2 V at 100 cd/ m2. © 2009 American Institute of Physics.

关键词： Naphthalene

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Slow light and signal processing in silicon nano-waveguides

Slow light and signal processing in silicon nano-waveguides

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2008 IEEE PhotonicsGlobal at Singapore, IPGC 2008

作者： Su, Yikai Li, Qiang Fangfei Liu Qingjiang Chang Ziyang Zhang Min Qiu State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 DongChuan Rd Shanghai 200240 China Department of Microelectronics and Applied Physics Royal Institute of Technology Sweden

We report various all-optical signal processing functions using silicon microring resonators with a 450250-nm cross section. These demonstrations include slow-light delay of phase-modulated data and microwave photonic... 详细信息

ISBN: (纸本)9781424429059

关键词： Silicon

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Concentric silicon micro-ring resonators with enhanced transmission notch depth

Concentric silicon micro-ring resonators with enhanced trans...

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Optoelectronic Materials and Devices III

作者： Li, Xiaohui Zhang, Ziyang Li, Qiang Qiu, Min Su, Yikai State Key Lab. of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai 200240 China Department of Microelectronics and Applied Physics Royal Institute of Technology 164 40 Kista Sweden

In this work, we have analyzed, fabricated and demonstrated concentric micro-ring resonators in silicon-on-insulator (SOI) structure for enhanced transmission notches. The operation principles of the concentric ring resonators are studied by time-domain coupled-mode theory. Directional coupling between concentric rings offers another freedom in designing deep notch optical filters and ultra-sensitive biosensors. The finite-difference-time-domain (FDTD) simulations have shown the improvement of the notch depth, evenly distributed mode field and the effect of the resonance shift. The device is demonstrated in silicon-on-insulator structure. Transmission notch depth improvement of ~ 15dB is demonstrated for the 21-20.02-μm-radius double-ring structure comparing with the single 21-μm-radius ring. © 2008 SPIE.

关键词： Silicon on insulator technology

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Ultra-compact mode-split silicon microring resonator for format conversion from NRZ to FSK

Ultra-compact mode-split silicon microring resonator for for...

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Optoelectronic Materials and Devices III

作者： Liu, Fangfei Li, Qiang Zhang, Ziyang Qiu, Min Su, Yikai State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 Dongchuan Rd. Shanghai 200240 China Department of Microelectronics and Applied Physics Royal Institute of Technology Electrum 229 164 40 Kista Sweden

We propose and experimentally demonstrate all optical format conversion from non-return-to-zero (NRZ) format to frequency-shift-keying (FSK) format based on free carrier dispersion effect in a silicon mode-split microring resonator. The injection of the high-power NRZ signal generates free carriers leading to the blue shift of the spectrum when a '1' comes. Therefore, there is a selective filtering for the two probes with certain separation located at different position of the split mode according to the information carried by the NRZ signal. Then the NRZ signal is converted to the FSK format. The microring resonator features ultra-compact size with a radius of 10 urn thus is suitable for integration with silicon-on-insulator (SOI) based optical and electronic devices. The split mode can provide large and variable frequency deviation for the FSK signal. 1 Gb/s NRZ signal is successfully converted to FSK format with a frequency deviation of 40 GHz, which can find application for interconnection between a metropolitan area networks (MAN) and a passive optical network (PON) system. © 2008 SPIE.

关键词： Passive optical networks

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Modeling and simulation for on-chip power grid networks by locally dominant krylov subspace method

Modeling and simulation for on-chip power grid networks by l...

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2008 International Conference on Computer-Aided Design, ICCAD

作者： Yan, Boyuan Tan, Sheldon X.-D. Chen, Gengsheng Wu, Lifeng Department of Electrical Engineering University of California Riverside CA 92521 United States ASIC and System State-Key-Lab Microelectronics Dept. Fudan Univeristy Shanghai 200433 China Cadence Design Systems Inc. San Jose CA 95134 United States

ISBN: (纸本)9781424428205

Fast analysis of power grid networks has been a challenging problem for many years. The huge size renders circuit simulation inefficient and the large number of inputs further limits the application of existing Krylov-subspace macromodeling algorithms. However, strong locality has been observed that two nodes geometrically far have very small electrical impact on each other because of the exponential attenuation. However, no systematic approaches have been proposed to exploit such locality. In this paper, we propose a novel modeling and simulation scheme, which can automatically identify the dominant inputs for a given observed node in a power grid network. This enables us to build extremely compact models by projecting the system onto the locally dominant Krylov subspace corresponding to those dominant inputs only. The resulting simulation can be very fast with the compact models if we only need to view the responses of a few nodes under many different inputs. Experimental results show that the proposed method can have at least 100X speedup over SPICE-like simulations on a number of large power grid networks up to 1M nodes.

关键词： Circuit simulation

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Slow Light and Signal Processing in Silicon Nano-waveguides

Slow Light and Signal Processing in Silicon Nano-waveguides

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IEEE PhotonicsGlobal@Singapore, IPGC

作者： Yikai Su Qiang Li Fangfei Liu Qingjiang Chang Ziyang Zhang Min Qiu State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiaotong University Shanghai China Department of Microelectronics and Applied Physics Royal Institute of Technology Sweden

We report various all-optical signal processing functions using silicon microring resonators with a 450times250-nm cross section. These demonstrations include slow-light delay of phase-modulated data and microwave pho... 详细信息

关键词： Slow light Signal processing Silicon Optical ring resonators Optical wavelength conversion Optical signal processing Nonlinear optics Passive optical networks Optical resonators Optical pumping

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Label-free biosensor based on silicon-on-insulator micro-ring resonators

Label-free biosensor based on silicon-on-insulator micro-rin...

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2008 IEEE PhotonicsGlobal at Singapore, IPGC 2008

作者： Li, Xiaohui Zhang, Ziyang Qin, Shengying Qiu, Min Su, Yikai State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai 200240 China Department of Microelectronics and Applied Physics Royal Institute of Technology 164 40 Kista Sweden Bio-X Life Science Research Center Shanghai Jiao Tong University Hao Ran Building Shanghai 200030 China

ISBN: (纸本)9781424429059

We propose a label-free biosensor based on concentric micro-ring resonators in silicon on insulator (SOI). The concentric micro-ring resonators offer another freedom to obtain deeper notches for higher detection sensitivity. The expanded modes also provide larger sensing area. A resonant frequency shift of ∼1.37 nm is demonstrated, by numerical simulations, between the situation of using a single strand DNA and a double strand DNA.

关键词： Biosensors

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Optically tuneable microwave-photonic phase shifter based on silicon microring resonator

Optically tuneable microwave-photonic phase shifter based on...

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European Conference on Optical Communication (ECOC)

作者： Qiang Li Qingjiang Chang Fangfei Liu Ziyang Zhang Min Qiu Yikai Su State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiaotong University Shanghai China Department of Microelectronics and Applied Physics Royal Institute of Technology Kista Sweden

We demonstrate a microwave-photonic phase shifter based on a 20-mum-radius silicon micro-ring resonator, providing a tunable phase shift for a 20-GHz signal in a range of 0 - -4.6 rad.

关键词： Optical resonators Phase shifters Silicon Optical ring resonators Resonance Nonlinear optics Optical signal processing Optical attenuators Fiber nonlinear optics Optical scattering

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Optical signal processing in silicon nano-waveguides

Optical signal processing in silicon nano-waveguides

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OptoElectronics and Communications Conference, OECC

作者： Yikai Su Qiang Li Fangfei Liu Ziyang Zhang Min Qiu State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiaotong University Shanghai China Department of Microelectronics and Applied Physics Royal Institute of Technology Kista Sweden

All-optical tunable delay, dense wavelength conversion, and non return-to-zero (NRZ) to alternate-mark-inversion (AMI) format conversion are experimentally demonstrated using silicon microrings with a 450 times 250 nm... 详细信息

关键词： Silicon Delay Optical signal processing Optical wavelength conversion Optical ring resonators Optical waveguides Optical filters

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Modeling and simulation for on-chip power grid networks by locally dominant Krylov subspace method 08

Modeling and simulation for on-chip power grid networks by l...

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IEEE International Conference on Computer-Aided Design

作者： Boyuan Yan Sheldon X.-D. Tan Gengsheng Chen Lifeng Wu Department of Electrical Engineering University of California Riverside CA USA ASIC & System State-Key-Lab MicroElectronics Department Fudan University Shanghai China Cadence Design Systems Inc. San Jose CA USA

ISBN: (纸本)9781424428205

关键词： Network-on-a-chip Power grids Power system modeling Transfer functions Attenuation Filters System-on-a-chip Application specific integrated circuits microelectronics Circuit analysis

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