Research fields and achievements of CSSP Laboratory

Current research fields

Modeling of Cardiac Electrcal Activity

Graphene Based Nano-Electronic and Opto-Electronic Devices

Terahertz and far infrared detectors Graphene terahertz laser

Plasma Wave Terahertz Devices

Proposal and theoretical assessment of detectors, mixers, and frequency multipliers utilizing plasma wave effects in HEMT-like heterostructures.

Micro- and Nano-electromechanical Terahertz Devices

Detectors of modulated terahertz radiation using electromechanical and plasma resonances in two-dimensional electron systems with mechanically floating gates /carbon nanotubes

Cooperation

Ultra-Broadband Signal Processing Group (Otsuji-Suemitsu Labotatory), Research Institute of Electrical Communication, Tohoku University, Sendai, Japan	Laboratory Head Professor T.Otsuji	Research topics: Theoretical and experimental study of graphene based and terahertz plasma wave devices
RPI/IBM Center for Broadband Data Transfer Science and Technology and Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA	Director of Center Professor M.Shur	Research topics: Theoretical and experimental study of heterostructure terahertz devices
Materials, Devices and Circuit Simulations Laboratory, University at Buffalo, Buffalo, USA	Laboratory Head Professor V.Mitin	Research topics: theory and simulation of microelectronic and nanoelectronic devices

Previous research fields and achievements

Quantum-Well and Quantum-Dot Infrared Photodetectors (QWIPs and QDIPs) and Structures

Elucidation of the influence of non-equilibrium electron transport on the capture effects in MQWs.
Prediction, theoretical study, and Monte Carlo simulation of self-organization and chaos in uncoupled MQWs.
Publications

Development of analytical and numerical (drift-diffusion and Monte Carlo) models for the QWIP steady-state and transient operation.
Monte Carlo simulation of QWIPs
Clarification and investigation of the role of contact and distributed effects in QWIPs.
Theoretical study and computer simulation of the capture, transit-time and strongly non-equilibrium effects in the QWIP transient (from low to ultra-high frequencies) operation.
Proposal and theoretical evaluation of a novel infrared photodetector - the unipolar Darlington QWIP
Proposal and theoretical evaluation of the bistable QWIP with a resonant-tunneling (RT) injection.
Proposal and theoretical study of the lateral hot electron infrared phototransistor.
Publications

Proposal of novel infrared photodetectors utilizing intersubband transitions from bound states in quantum dots into continuum states - the quantum dot infrared photodetectors (QDIPs).
Estimation of QDIP and QRIP performance in comparison with that of QWIPs.
Publications

Metal-Semiconductor-Metal (MSM) and heterostructure photodetectors

Development of analytical and Monte Carlo models for interdigitated MSM PDs.
Theoretical study and computer simulation of the MSM PD operation in terahertz range of signal frequencies.
Publications

Uni-Traveling-Carrier Photodetectors (UTC PDs)

	Heterostructure Transistors, Lasers, and Integrated Optoelectronis Devices
Heterostructure Transistors Theoretical investigation of resonant plasma effects in the hot-electron transistors (HETs) with high electron mobility in the base and proposal of novel terahertz devices utilizing these effects. Proposal of a bistable bipolar transistor with an RT electron extraction and accumulation of electron mobil space charge in the collector depletion region and its theoretical study and computer simulation. Publications Lasers and Integrated Optoelectronis Devices Proposal and theoretical investigation of the laser-transistors with an RT extraction of electrons (holes) from an active region. Proposal and theoretical evaluation of the up-converters of the infrared radiation on t he base of integrated quantum-well infrared photodetector - light-emitting diode (QWIP-LED) structures. Detailed theoretical study of the physics of pixelless QWIP-LED imager operation. Publications

Former Cooperation

Physical Electronics and Photonics, Department of Microelectronics and Nanoscience, Chalmers University of Technology, Gothenburg, Sweden	Group Head Professor M.Willander	Research topics: theoretical and experimental study of MSM photodetectors, laser-transistors and terahertz detectors and mixers based on hot-electron transistors
Department of Theoretical Bases of Microelectronics, Ioffe Physical-Technical Institute, St.Petersburg, Russia	Department Head Professor R.Suris	Research topics: theoretical study of nonequilibrium processes in MQW structures
Semiconductor Electonics Laboratory, Osaka University, Osaka, Japan	Laboratory Head Professor C.Hamaguchi	Research topics: theoretical study of nonequilibrium processes in MQW structures
Imaging Devices Group, NRC Institute for Microstructural Sciences, Ottawa, Canada	Group Leader Dr. H.C.Liu	Research topics: theoretical and experimental study of QWIPs, QWIP-LED imagers and other devices