Photo ionization of excited atoms in gas-filled photodiodes: Improved detectivity with microsecond-order risetime

N. S. Kopeika; G. Eytan

doi:10.1109/TPS.1978.4317079

Photo ionization of excited atoms in gas-filled photodiodes: Improved detectivity with microsecond-order risetime

N. S. Kopeika, G. Eytan

Department of Electrical & Computer Engineering

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Photoionization of excited atoms and resonant absorption effects, which can decrease gas breakdown thresholds by high-power lasers at decreasing wavelengths, also improve low intensity detection sensitivities of gas-filled photodiodes when such devices are biased with dc fields close to gas breakdown. Spectral results indicate very promising potential sensitivity for detecting ultra-violet raidation. D* even in the visible is comparible to that of silicon photodiodes. The "relatively" large dc bias fields employed here improve speed of response significantly. Over moderate (10-7 - 10-8W) received signal powers response is non-linear with γ varying inversely with wavelength.

Original language	English
Pages (from-to)	1-16
Number of pages	16
Journal	IEEE Transactions on Plasma Science
Volume	6
Issue number	1
DOIs	https://doi.org/10.1109/TPS.1978.4317079
State	Published - 1 Jan 1978

ASJC Scopus subject areas

Nuclear and High Energy Physics
Condensed Matter Physics

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N2 - Photoionization of excited atoms and resonant absorption effects, which can decrease gas breakdown thresholds by high-power lasers at decreasing wavelengths, also improve low intensity detection sensitivities of gas-filled photodiodes when such devices are biased with dc fields close to gas breakdown. Spectral results indicate very promising potential sensitivity for detecting ultra-violet raidation. D* even in the visible is comparible to that of silicon photodiodes. The "relatively" large dc bias fields employed here improve speed of response significantly. Over moderate (10-7 - 10-8W) received signal powers response is non-linear with γ varying inversely with wavelength.

AB - Photoionization of excited atoms and resonant absorption effects, which can decrease gas breakdown thresholds by high-power lasers at decreasing wavelengths, also improve low intensity detection sensitivities of gas-filled photodiodes when such devices are biased with dc fields close to gas breakdown. Spectral results indicate very promising potential sensitivity for detecting ultra-violet raidation. D* even in the visible is comparible to that of silicon photodiodes. The "relatively" large dc bias fields employed here improve speed of response significantly. Over moderate (10-7 - 10-8W) received signal powers response is non-linear with γ varying inversely with wavelength.

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Photo ionization of excited atoms in gas-filled photodiodes: Improved detectivity with microsecond-order risetime

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