High performance, room temperature, broadband II-VI quantum cascade detector

Arvind P. Ravikumar, Joel De Jesus, Maria C. Tamargo, Claire F. Gmachl

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Abstract

We report on the experimental demonstration of a room temperature, II-VI, ZnCdSe/ZnCdMgSe, broadband Quantum Cascade detector. The detector consists of 30 periods of 2 interleaved active-absorption regions centered at wavelengths 4.8μm and 5.8μm, respectively. A broad and smooth photocurrent spectrum between 3.3μm and 6μm spanning a width of 1030cm-1 measured at 10% above baseline was obtained up to 280K, corresponding to a Δ E / E of 47%. Calibrated blackbody responsivity measurements show a measured peak responsivity of 40mA/W at 80K, corresponding to a detectivity of about 3.1 × 10 10 cm Hz / W. Bias dependent photocurrent measurements revealed no significant change in the spectral shape, suggesting an impedance matched structure between the different active regions.

Original languageEnglish (US)
Article number141105
JournalApplied Physics Letters
Volume107
Issue number14
DOIs
StatePublished - Oct 5 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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