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The effect of diffusion on the impulse response of RCE detector

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2001
Authors
Đurić, Zoran G.
Krstajić, Predrag
Smiljanić, Miloljub
Ranđelović, Danijela
Article (Published version)
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Abstract
We present a theory which demonstrates how the diffusion of photogenerated carriers affects the impulse response of a resonant-cavity enhanced photodetector (RCE). Analytic expressions for carrier densities and short-circuit current are derived. The theory indicates that diffusion introduces a significant tail in temporal response of photodetectors. The influence of diffusion rises as the absorption width decreases, and a discrepancy in bandwidth as high as 35% between our results and previous theoretical predictions is observed. Therefore, the effect should be taken into account while calculating the critical parameters of RCE photodetectors with thin absorption region.
Keywords:
Bandwidth / Diffusion / Impulse response / Quantum efficiency / Resonant-cavity-enhanced photodetector
Source:
IEEE Photonics Technology Letters, 2001, 13, 6, 620-622

DOI: 10.1109/68.924044

ISSN: 1041-1135

WoS: 000168833300028

Scopus: 2-s2.0-0035365130
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/45
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