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Photodiodes for detecting the emission of quantum-sized disc lasers operating in the whispering gallery modes (2.2-2.3 μm)

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Abstract

Photodiodes based on solid solutions in the GaSb-InAs system are for the first time applied to study the spectral characteristics of single and coupled whispering-gallery-mode (WGM) lasers emitting in a range of 2.2-2.3 mu m. The capacity of photodiodes with a photosensitive area 2.0 mm in diameter isC= 520 pF atU= -2 V, which corresponds to a time constant of tau = 53 ns. It is shown that the parameters of the fabricated photodiodes make it possible to detect the emission of quantum-sized disc lasers at room temperature not using cryogenic cooling.

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Lead, Photodiodes, Gasb, Gainassb, Gaalassb heterostructures, Quantum-sized disc lasers, Wgm modes, Science & technology, Physical sciences, Physics, condensed matter, Physics

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