Near-Infrared Photoresponse in Photon-Triggered Nanowire Transistors

Jungkil Kim, Min Soo Hwang, Ha Reem Kim, Hoo Cheol Lee, Jung Min Lee, Kyoung Ho Kim, Hosung Lee, Jinsan Kim, Hong Gyu Park

Research output: Contribution to journalArticlepeer-review


We investigated a photon-triggered nanowire transistor with near-infrared spectral photoresponse. To understand the mechanism of operation of the nanowire transistor consisting of crystalline Si and porous Si segments, we performed a qualitative analysis of trapped carriers in the porous Si and modeling of a transistor operated by photon gating. We then fabricated a photon-triggered transistor device with a nanowire diameter of 200 nm and a porous Si length of 400 nm. Systematic measurements and analyses demonstrate that the wavelength dependence of the photon-triggered current generation is caused by a broad range of energy levels for the localized trap states of the porous Si segment. We believe that these results pave the way for simplification of the fabrication and operation of ultracompact nanoprocessors and development of efficient nanoscale photodetectors for high-resolution imaging.

Original languageEnglish
Pages (from-to)68-72
Number of pages5
JournalJournal of the Korean Physical Society
Issue number1
Publication statusPublished - 2019 Jul 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2018R1A3A3000666).

Publisher Copyright:
© 2019, The Korean Physical Society.


  • Infrared
  • Nanowire
  • Photoresponse
  • Transistor

ASJC Scopus subject areas

  • General Physics and Astronomy


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