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Proceedings Paper

A bio-inspired single photon detector with suppressed noise and low jitter
Author(s): Omer Gokalp Memis; Alex Katsnelson; Hooman Mohseni; Minjun Yan; Shuang Zhang; Tim Hossain; Niu Jin; Ilesanmi Adesida
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Paper Abstract

A novel short wave infrared single photon detector was conceived for wavelengths beyond 1 μm. The detector, called the nano-injection photon detector, is conceptually designed with biological inspirations taken from the eye. Based on a detection process similar to the human visual system, the detector couples a nano-scale sensory region with a large absorption volume to provide a low-noise internal amplification mechanism, high signal-to-noise ratio and quantum efficiency. Tens of thousands of devices were fabricated in different configurations with conventional processing methods in more than 20 iterations. For low speed imaging applications, the detectors have shown gain values reaching 10,000 with bias voltages around 1 V. Ultra-low noise levels were measured at gain values exceeding 4,000 at room temperature: Fano factors as low as 0.55 has been achieved, which indicated a statistically stable amplification mechanism and resulting sub-Poissionian shot noise. An alternate version of the detector, which is specialized towards high-speed applications, has also been developed with slight changes in processing steps. The fast detectors with bandwidth beyond 3 Ghz were demonstrated which provide gain values around 20. The measured risetime was less than 200 ps. Femtosecond pulsed illumination measurements exhibited ultra-low jitter around 15 ps. Transient delay experiments revealed that the measured jitter is due to the transit time in the large absorption region. Hence the amplification process has insignificant time-uncertainty in addition to low amplitude-variance (noise), which is consistent with statistically stable nature of amplification.

Paper Details

Date Published: 29 August 2008
PDF: 12 pages
Proc. SPIE 7035, Biosensing, 70350V (29 August 2008); doi: 10.1117/12.796448
Show Author Affiliations
Omer Gokalp Memis, Northwestern Univ. (United States)
Alex Katsnelson, Northwestern Univ. (United States)
Hooman Mohseni, Northwestern Univ. (United States)
Minjun Yan, Univ. of Illinois at Urbana-Champaign (United States)
Shuang Zhang, Univ. of Illinois at Urbana-Champaign (United States)
Tim Hossain, Univ. of Illinois at Urbana-Champaign (United States)
Niu Jin, Univ. of Illinois at Urbana-Champaign (United States)
Ilesanmi Adesida, Univ. of Illinois at Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 7035:
Manijeh Razeghi; Hooman Mohseni, Editor(s)

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