Wavelength tuning of surface plasmon coupled quantum well infrared photodetectors

Cheng Wei Hsu, Hong-Shi Ling, Shiang Yu Wang, Chien-Ping Lee

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

A novel method of detection wavelength tuning for surface plasmon coupled quantum well infrared photodetectors (QWIPs) was demonstrated. By changing of the thickness of the top contact layer, the detection wavelength can be adjusted. The displacement of the detection wavelength is related to the effective dielectric constant of the dielectric layers in the device structure. The peak wavelength moves toward longer wavelength as the contact layer thickness decreases. With a proper match of the 2D metal hole array and the QW absorption region, the responsivity can be kept within a reasonable range for samples with different top contact layer thicknesses. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Original languageEnglish
Pages (from-to)552-558
Number of pages7
JournalOptics Express
DOIs
StatePublished - 8 Jun 2018

Keywords

  • LIGHT CONCENTRATION; GAAS; BAND

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