Speaker:
Dr. Sukhdev Roy
Department of Physics and Computer Science
Dayalbagh Educational Institute, Dayalbagh, Agra 282 110 INDIA
Title:
All-Optical Bio-molecular Computing with Photochromic Proteins
Date:
Tuesday, June 8, 2010
Time:
10:00 am - 11:00 am
Location:
EIT 3142
Abstract:
The main challenge at present is to achieve all-optical information
processing, to eliminate the electronic bottleneck and to meet the
anticipated demand for ultra-high bandwidth ultra-high speed communication
and computing. This powerful capability requires an efficient nonlinear
optical material response.
Since light sustains life on earth, diverse systems such as plants,
seaweeds, and photo-synthesizing bacteria absorb ambient light to perform
a variety of important functions. During the past decade, there has been
extraordinary progress in identifying and characterizing ultrasensitive
natural photoreceptor proteins in a broad range of organisms to
understand the signal transduction pathways and get an insight into
their multifunctional response. The prospect of using their efficient
nonlinear optical response, optimized over centuries of evolution,
for photonic applications, is extremely fascinating. Moreover, with the
powerful capabilities of nano and biotechnologies, their photo-response
can also be tailored to meet desired specifications.
The talk would focus on some of our recent experimental and theoretical
results on all-optical switching in the unique natural photoreceptor
molecules, namely, archael rhodopsin proteins, such as, bacteriorhodopsin
(BR), pharaonis phoborhodopsin (a sensory rhodopsin II) and the recently
discovered proteorhodopsin; plant based blue light sensitive LOV2
phototropin, photoactive yellow protein (PYP) and chlorophyll-A, based on
excited-state absorption and protein-coated ultrahigh-Q microresonator
cavities. We would also compare their performance with other organic
molecules such as fullerenes, organometallics and organic dyes.
We will discuss its application to design all-optical low-power
biomolecular boolean and reversible/conservative arithmetic and logic
devices and circuits that include, spatial light modulators, logic gates
(NAND, NOR, Fredkin, Toffoli, Feynman and Peres. etc.), adder-subtractor,
MUX/DE-MUX, ALU and PLAs.
The talk would highlight (i) the emergence of a new class of photonic
materials, (ii) the prospects for optical biomolecular computing and (iii)
the application of nano and biotechnologies for information technology
(Nano-Bio-Photonics), a unique amalgamation of the three modern age
thrust areas.
Biography:
Sukhdev Roy obtained the B.Sc. (Hons.) degree in Physics from Delhi
University, in 1986, M.Sc. degree in Physics with specialization in
Electronic Science, from Dayalbagh Educational Institute, Agra, in 1988,
and Ph.D. degree in Physics, from Indian Institute of Technology, Delhi,
India, in 1993.
He was a Senior Research Assistant at the Department of Physics, Indian
Institute of Technology, Delhi, from 1988 to 1989. Since 1993, he has been
with the Department of Physics and Computer Science, Dayalbagh Educational
Institute, Agra, where he is at present an Associate Professor. He has
been a Visiting Scientist for short terms during summer at the Tata
Institute of Fundamental Research, Mumbai, India, 2002-2004; at Osaka
University, 2006, Harvard University, 2007 and 2009 and at Queen Mary,
University of London, 2009. His areas of interest are nano-photonics,
bio-molecular computing and all-optical information processing.
Dr. Roy is a Fellow of the Optical Society of India, Life Member of the
National Academy of Sciences, India, Member of IEEE, the Optical Society
of America, Sigma Xi, Indian Science Congress Association, Indian Laser
Association, Institution of Electronics and Telecommunications, India,
and the Biosensor Society, India and Member Technologist, Institution
of Engineers (India). He was awarded the 1st B.B. Sen Memorial Award by
the Institution of Electronics and Telecommunication Engineers, India
in 2007, the Hari Ohm Ashram Prerit Shri H.C. Shah Research Endowment
Prize by Sardar Patel University, India in 2008, Best Paper Presentation
Awards by the Indian Science Congress Association in 2000 and 2001
and by the Systems Society of India in 1995 and 2008. He was awarded
the SERC Visiting Research Fellowship to the Department of Aerospace
Engineering, Indian Institute of Science, Bangalore, in 1998; the Career
Award for Young Teachers by the All-India Council for Technical Education,
India, in 2001 and the Japan Society for Promotion of Science Invitation
Fellowship to Hokkaido University, Sapporo, Japan, in 2004.
He is the Guest Editor of the forthcoming IET CDS (UK) special issue on
Optical Computing Circuits, Devices and Systems in 2010, and is also on
the Editorial Board of Recent Patents on Signal Processing and the Journal
of Electronic Science and Technology. He has given invited talks/seminars
at leading universities in USA, UK, Canada, Germany and Japan. He has
published more than 100 papers in journal and conference proceedings
and has contributed three book chapters. He was an invited speaker at
the Annual Meeting of the American Physical Society, New Orleans, in
March, 2008. He also delivered the Keynote Address at the International
Conference on Nanotechnology, Optoelectronics and Photonic Technologies
(NOPT-2010), at Singapore, Feb 26-28, 2010.
Invited by:
Prof.
S. Saini
