Field effect enhanced quantum dot resonant tunneling diode for high dynamic range light detection

W. P. Wang, Y. Hou, N. Li, Z. F. Li, X. S. Chen, W. Lu, W. X. Wang, H. Chen, J. M. Zhou, E. Wu, H. P. Zeng

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

A field effect enhanced quantum dot resonant tunneling diode is proposed and demonstrated to improve the detection dynamic range for low light imaging application. Using the cross-wire device geometry, a lateral two dimensional electron gas (2DEG) current is formed in the quantum well channel together with the normal resonant tunneling current for quantum dot modulation. A peak photoresponsivity of the order of 1010 A/W and a light detection saturation level up to 105 photons per second at 77 K are achieved when the 2DEG current makes the main photocurrent contribution.

Original languageEnglish
Article number093511
JournalApplied Physics Letters
Volume94
Issue number9
DOIs
StatePublished - 2009

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