Abstract

Internal quantum efficiency (IQE) is an important figure of merit for photoelectric applications. While the InAs core/shell (c/s) nanowire (NW) is a promising solution for efficient quantum emission, the relationship between the IQE and shell coating remains unclear. This Letter reports mid-infrared PL measurements on InAs/InGaAs, InAs/AlSb, and InAs/GaSb c/s NWs, together with bare InAs NWs as a reference. Analyses show that the IQE is depressed by a shell coating at 9 K but gets improved by up to approximately 50% for the InGaAs shell coating at 40 –140 K and up to approximately 20% beyond 110 K for the AlSb shell. The effect is ascribed not only to the crystal quality but more importantly to the radial band alignment. The result indicates the high-temperature IQE improvement of the type-I and type-II c/s NWs and the appropriateness of the mid-infrared PL analyses for narrow-gap NW evaluation.

© 2022 Optica Publishing Group

Mid-infrared photoluminescence revealing internal quantum efficiency enhancement of type-I and type-II InAs core/shell nanowires: publisher’s note

Xiren Chen, H. Alradhi, Zh. M. Jin, Liangqing Zhu, A. M. Sanchez, Shufang Ma, Qiandong Zhuang, and Jun Shao
Opt. Lett. 47(21) 5659-5659 (2022)

Bias-selectable three-color short-, extended-short-, and mid-wavelength infrared photodetectors based on type-II InAs/GaSb/AlSb superlattices

Abbas Haddadi and Manijeh Razeghi
Opt. Lett. 42(21) 4275-4278 (2017)

Type-II superlattice-based extended short-wavelength infrared focal plane array with an AlAsSb/GaSb superlattice etch-stop layer to allow near-visible light detection

Romain Chevallier, Arash Dehzangi, Abbas Haddadii, and Manijeh Razeghi
Opt. Lett. 42(21) 4299-4302 (2017)

Enhanced radiative and thermal properties from surface encapsulation of InAs nanowires

Xinxin Li, Alexander C. Walhof, Weitao Dai, Ilke Arslan, Yuzi Liu, Fatima Toor, and John P. Prineas
Opt. Mater. Express 11(3) 719-728 (2021)

Multiphoton absorption in type-II InAs/GaSb superlattice structure

Chengcheng Zhao, Jianliang Huang, Biying Nie, Jinchuan Zhang, Yanhua Zhang, and Wenquan Ma
Opt. Lett. 45(1) 165-168 (2020)