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Biswadev Roy

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Contact Information

Title:
Research Professor
Email:
broy@nccu.edu
Phone:
(919) 530-6350
Fax:
(919) 530-6010
Office:
1146 Mary M. Townes Science Building

Jobs/Responsibilities

Dr. Roy works as research professor at the NCCU CREST center and currently involved with UNC-GA ROI on experiments "very fast time-resolved millimeter wave conductance (TRmmWC)system for applications to inorganic/organic and hybrid perovskite materials", apparatus calibration, data acquisition and analysis to study charge dynamical and dielectric properties including wide band gap and 2D materials. He is also involved with the National Science Foundation (NSF) project on collaboration with ORaCEL at NC State University. His secondary responsibility is to continue experiment, maintain radiation safety and automate a custom built 1.2 MeV NCCU electron linear accelerator facility (EAF)and write grant proposals for requesting funds to convert the EAF to reliable high average energy pulsed THz source, deposition studies. Dr. Roy independently writes and collaborates in research proposals for obtaining grants from various agencies in these areas and continues to publish results in peer reviewed journals and conference proceedings. Dr. Roy volunteers his time to the cause of Sigma-Xi Scientific Honor Society and summer research science program (SRSP) at NCCU. He is a regular member of Sigma Xi honor society, American physical society (APS) and the Institution of Electrical & Electronics Engineering (IEEE).

Research Interests

Accomplished setting up a free space time-resolved millimeter-wave transient conductivity measurement facility (TRMMWC) with picosecond resolution at the NCCU laboratory for material characterization and microwave applications. This setup was completed using electrovaccum backward wave oscillator (BWO) as probe source(resembling the well known flash photolysis technique), an actively Q-switched diode pumped 532 nm solid-state laser system as pump source, zero-bias Schottky diode detector and a very high resolution transient digitizer. A large number of datasets are already obtained for crystalline Silicon, Gallium Arsenide, CdX (X=A, Se), Silicon Dioxide with Germanium nanocrystals, c-Si irradiated with Gamma, and ions such as Proton and Chlorine. DC responses from 21 organic materials are also being currently analyzed for studying in details their dielectric properties using probe spectra. Current work involves TRMMWC system characterization and sensitivity analyses using known PV silicon samples (with variety of resistivity), and related modeling. Dr. Roy is currently exploring application of the d.c. reflection and transmission datasets for various inorganic, organic and hybrid samples to study the dielectric properties. Also exploring application of magneto-optical spectroscopy of solids using existing BWO facility at NCCU and writing proposal/white paper on creation of a sub-millimeter resonator-spectrometer (Fabrey-Perot type) for condensed matter and atmospheric applications in the 45-370 GHz range. NCCU S-band linear electron accelerator facility (EAF) is also being operated and aligned for electron-beam aided nanodeposition, quantum-dot fabrication, Al foil coherent transition radiation (CTR) for terahertz source, UED, and Bremsstrahlung for radiation studies, and training.

Education

MS University of Central Florida 2000
PhD Jadavpur University 1996
MS University of Roorkee 1986

Vita/Resume

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