Two-band ZnCdSe/ZnCdMgSe quantum well infrared photodetector

Yasin Kaya, Arvind Ravikumar, Guopeng Chen, Maria C. Tamargo, Aidong Shen, Claire F. Gmachl

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14 Scopus citations


An independently controllable, two-band quantum well infrared photo-detector (QWIP) based on the ZnCdSe/ZnCdMgSe material system is characterized. The two-band detector consists of two stacks of quantum wells absorbing in the mid- and long-wavelength infrared regime. Photocurrent and responsivity measurements resulted in 11 mA/W and 7 mA/W peak responsivities at 80 K with corresponding detectivities of 2 × 108 cm√Hz/W and 2 × 107 cm√Hz/W centered at 4.8 μm (258 meV) and 7.6 μm (163 meV). The two-band device can also perform as a broadband detector covering wavelengths from 4.4 μm (281 meV) to 8.2 μm (151 meV) at 80 K with a full width at half maximum of 130 meV. Two-band QWIP is tested for an absolute temperature detection application and good agreement is observed between theoretical calculation and experimental results.

Original languageEnglish (US)
Article number075105
JournalAIP Advances
Issue number7
StatePublished - Jul 1 2018

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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