Seminar Announcement
These events are organized by various sub-sets of the IEEE Toronto Section.
The contact person listed below is the volunteer who has arranged this event.
Please use the e-mail link provided if you have any questions, suggestions,
or concerns.
| Title
|
Quantum Cascade Lasers – Distributed Feedback Lasers and
Arrays for Chemical Sensing |
| Speaker
|
Dr. Benjamin Lee
Harvard Applied Physics and IIT Bombay |
| Day and Time
|
Tuesday, June 16, 2009, 11:00 a.m. |
| Location
|
Room GB 248, Galbraith Building
University of Toronto
35 St. George Street
map - select GB |
| Organizer
|
IEEE Circuits & Devices Chapter and Optical Society of America |
| Contact
|
Emanuel Istrate, E-mail:
All are welcome. Refreshments will be served. |
| Abstract |
Quantum cascade lasers (QCLs) are unipolar semiconductor lasers based
on intersubband transitions in heterostructures. The emission
wavelengths of mid-infrared QCLs span from 3 to 24 microns and cover
the "fingerprint" region of molecular absorption. This makes QCLs
particularly interesting for spectroscopic applications. I will
discuss the development of arrays of distributed-feedback QCLs as
widely-tunable, single-mode laser sources, and demonstrate their
applications to chemical sensing. The potential for high-resolution
spectroscopy, spectroscopy of dense media, and remote sensing are
explored.
|
| Biography |
Benjamin Lee is a native of Toronto, Canada. He received the B. S.
degree in Applied Physics from Caltech in 2002. He recently finished
a Ph.D. degree in Applied Physics, in the School of Engineering and
Applied Sciences at Harvard University. He did his thesis under the
supervision of Prof. Federico Capasso, on the topic of quantum cascade
lasers – distributed feedback devices and applications in chemical
sensing. His research interests include the development of novel
quantum cascade laser devices for spectroscopy and chemical sensing,
optoelectronics for solar energy harvesting, microfabrication and
nanotechnology. He has recently returned from India, where he taught
for one semester at IIT Bombay.
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