Title: Infrared response of Pt/Si/ErSi1.7 heterostructure: Tunable internal photoemission sensor
Abstract: We present the first internal photoemission response of a metal-Si-metal heterostructure. Using the Pt/Si/ErSi1.7 system, we show that the photoresponse of this new device can be strongly modified when a bias of a few hundred mV is applied between the two metallic electrodes: the cutoff wavelength is shifted from 1.4 μm to above 5 μm, and the quantum efficiency is increased up to 5% at 1.2 μm wavelength when a positive bias is applied to the front Pt electrode. These dramatic changes are attributed to a modulation of the effective potential barrier experienced by the photoexcited carriers when crossing the Si film.
Publication Year: 1992
Publication Date: 1992-03-09
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 74
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