Author(s): Zhu, YX (Zhu, Yixuan); Zhai, SQ (Zhai, Shenqiang); Liu, JQ (Liu, Junqi); Li, K (Li, Kun); Yang, K (Yang, Ke); Liu, SM (Liu, Shuman); Zhang, JC (Zhang, Jinchuan); Zhuo, N (Zhuo, Ning); Wang, LJ (Wang, Lijun); Liu, FQ (Liu, Fengqi)

Source: OPTICS EXPRESS Volume: 29 Issue: 23 Pages: 37327-37335 DOI: 10.1364/OE.438919 Published: NOV 8 2021

Abstract: We have demonstrated a mid-wave/long-wave dual-color infrared quantum cascade detector enhanced by antenna-coupled microcavity. By optimizing the size of patches, the coupling wavelength of the antenna-coupled microcavity can be conveniently tuned to match the targeted intersubband transition energy. At 77 K, the peak responsivity of our detector is 4.1mA/W for long wave (10.4 mu m) and 0.6mA/W for mid wave (5.8 mu m), while the detectivity is 1.8x10(9) cm.Hz(1/2)/W (Jones) and 2.6x10(8) cm.Hz(1/2)/W (Jones), respectively. Compared with a reference device with a 45 degrees multi-pass geometry, the responsivity of our detector has been increased by a factor of 9.1 for the long wave and 2.7 for the mid wave. Our results illustrate how to realize a dual-color infrared detector and improve the optoelectronic performance through the concept of antenna-coupled microcavity. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Accession Number: WOS:000716468800027

PubMed ID: 34808807

ISSN: 1094-4087

Full Text: https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-29-23-37327&id=462636