Double electron barrier structure for suppression of dark current in microjunction-based type-II InAs/InAsSb superlattice long-wavelength infrared photodetectors

Romain Chevallier; Abbas Haddadi; Manijeh Razeghi

doi:10.1117/12.2297477

26 January 2018 Double electron barrier structure for suppression of dark current in microjunction-based type-II InAs/InAsSb superlattice long-wavelength infrared photodetectors

Romain Chevallier, Abbas Haddadi, Manijeh Razeghi

Author Affiliations +

Proceedings Volume 10540, Quantum Sensing and Nano Electronics and Photonics XV; 1054007 (2018) https://doi.org/10.1117/12.2297477
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Reduction of dark current density in microjunction-based InAs/InAs_1-xSb_x type-II superlattice long-wavelength infrared photodetectors was demonstrated. A double electron barrier design was used to suppress both generation-recombination and surface dark currents. The photodetectors exhibited high surface resistivity after passivation with SiO₂, which permits the use of small size features without having strong surface leakage current degrading the electrical performance. Fabricating a microjunction structure (25×25 μm² mesas with 10×10 μm² microjunctions) with this photodetector double barrier design results in a dark current density of 6.3×10^-6 A/cm² at 77 K. The device has an 8 μm cut-off wavelength at 77 K and exhibits a quantum efficiency of 31% for a 2 μm-thick absorption region, which results in a specific detectivity value of 1.2×10¹² cm·Hz^1/2/W at 77 K.

Citation Download Citation

Romain Chevallier, Abbas Haddadi, and Manijeh Razeghi "Double electron barrier structure for suppression of dark current in microjunction-based type-II InAs/InAsSb superlattice long-wavelength infrared photodetectors", Proc. SPIE 10540, Quantum Sensing and Nano Electronics and Photonics XV, 1054007 (26 January 2018); https://doi.org/10.1117/12.2297477

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available