Polarization-resolved black phosphorus/molybdenum disulfide mid-wave infrared photodiodes with high detectivity at room temperature

James Bullock, Matin Amani, Joy Cho, Yu Ze Chen, Geun Ho Ahn, Valerio Adinolfi, Vivek Raj Shrestha, Yang Gao, Kenneth B. Crozier, Yu Lun Chueh, Ali Javey

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77 Citations (Scopus)

Abstract

Infrared photodetectors are currently subject to a rapidly expanding application space, with an increasing demand for compact, sensitive and inexpensive detectors. Despite continued advancement, technological factors limit the widespread usage of such detectors, specifically, the need for cooling and the high costs associated with processing of iii–v/ii–vi semiconductors. Here, black phosphorous (bP)/MoS2 heterojunction photodiodes are explored as mid-wave infrared (MWIR) detectors. Although previous studies have demonstrated photodiodes using bP, here we significantly improve the performance, showing that such devices can be competitive with conventional MWIR photodetectors. By optimizing the device structure and light management, we demonstrate a two-terminal device that achieves room-temperature external quantum efficiencies (ηe) of 35% and specific detectivities (D*) as high as 1.1 × 1010 cm Hz1/2 W−1 in the MWIR region. Furthermore, by leveraging the anisotropic optical properties of bP we demonstrate the first bias-selectable polarization-resolved photodetector that operates without the need for external optics.

Original languageEnglish
Pages (from-to)601-607
Number of pages7
JournalNature Photonics
Volume12
Issue number10
DOIs
Publication statusPublished - 2018 Oct 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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    Bullock, J., Amani, M., Cho, J., Chen, Y. Z., Ahn, G. H., Adinolfi, V., Shrestha, V. R., Gao, Y., Crozier, K. B., Chueh, Y. L., & Javey, A. (2018). Polarization-resolved black phosphorus/molybdenum disulfide mid-wave infrared photodiodes with high detectivity at room temperature. Nature Photonics, 12(10), 601-607. https://doi.org/10.1038/s41566-018-0239-8