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Ultra-sensitive Nano-injection Photon Detectors

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When Apr 07, 2014
from 01:00 PM to 02:30 PM
Where 54-134 E4
Contact Name
Contact Phone 310-206-1371
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Seminar Series

Prof. Hooman Mohseni,
Northwestern University

Abstract
We present recent breakthroughs in sensitivity of Nano-injection detectors in the short wavelength infrared (SWIR) region. Improved device design and processing has led to over three orders of magnitude reduction in the device dark current density, while a very large internal gain (~1000) can be achieved at a device bias of a few volts. When hybridized with conventional readout integrated circuits (ROIC), the device internal gain effectively reduces the ROIC noise to a fraction of 1 electron rms. Compared with linear gain avalanche detectors based on HgCdTe, the nano-injector internal dark current is four orders of magnitude smaller. The extremely small dark current, combined with the high internal gain, allows single-photon detection at thermoelectrically accessible temperatures. This can lead to a significant impact on many applications including medical imaging, night vision, quantum computing, and astronomy.

Biography
Hooman Mohseni received his Ph.D. degree in Electrical Engineering from Northwestern University in 2001. He then joined Sarnoff Corporation, where he was a Member of Technical Staff leading several government, domestic, and international commercial projects. He joined Northwestern University as a faculty member in 2004. Mohseni is the director of Bio-inspired Sensors and Optoelectronics Lab (BISOL), and Northwestern’s Solid-state and Photonics Initiative. He is a recipient of Young Faculty Award from Defense Advanced Project Agency (DARPA) in 2007. He was selected by NSF as a US delegates in US-Korea Nano-manufacturing Exchange program in 2007, and US-Japan Young Scientist Exchange Program on Nanotechnology in 2006. He received National Science Foundation’s CAREER Award in 2006. Mohseni has served as the Advisory Board, Program Chair and Co-chair in several major conferences including IEEE Photonics, SPIE Optics and Photonics, and SPIE Security and Defense. Dr. Mohseni has published over 110 peer-reviewed articles in major scientific journals including Nature, Nano Letters, Small, and ACS Nano. He holds 14 issued US and International patents on novel optoelectronic devices and nano-processing. Mohseni has presented more than 51 invited and keynote talks at different commercial, government, and educational institutes. He is a Fellow of SPIE, a Fellow of Optical Society of America, and a Senior Member of IEEE.

Department Hosting: Electrical Engineering

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