Description: Description:
hseas-logo*Special****Harvard EE Seminar***
11-12 noon Monday, April 16, 2012
Pierce Hall, 100F
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*Silicon Monolithic MEMS + Photonic Systems*
*Sunil Bhave*
Cornell University
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Optomechanical systems offer one of the most sensitive methods for
detecting mechanical motion using shifts in the optical resonance
frequency of the optomechanical resonator. Presently, these systems
are used for measuring mechanical thermal noise displacement or
mechanical motion actuated by optical forces. Meanwhile, electrostatic
capacitive actuation and detection is the main transduction scheme
used in RF MEMS resonators. The use of electrostatics is convenient as
it allows direct integration with electronics used for processing the
RF signals.
In this talk, I will introduce a method for actuating an
optomechanical resonator using electrostatic forces and sensing of
mechanical motion by using the optical intensity modulation at the
output of an optomechanical resonator, integrated into a monolithic
system fabricated on a silicon-on-insulator (SOI) platform. I will
discuss new applications enabled by this hybrid system including
Opto-Acoustic Oscillators (OAO) and Opto-Mechanical Gyroscopes (OMG).
Biography: Sunil received the B.S. and Ph.D. degrees from Berkeley in
EECS in 1998 and 2004 respectively. In October 2004, he joined the
faculty of Cornell, where he is presently an Associate Professor in
Electrical Engineering. Sunil received the NSF CAREER Award in 2007
and the DARPA Young Faculty Award in 2008. His students have received
the Best Student Paper Award at Ultrasonics 2009 and the Roger A.
Haken Best Student Paper Award at IEDM 2007. Sunil is the co-founder
of Silicon Clocks, which was acquired by Silicon Labs in April 2010.
He is currently on industry leave working with the MEMS Product
Development team at Analog Devices in Boston.
Host: MarkoLončar