InGaAs bow-tie diodes for terahertz imaging: low frequency noise characterisation

Linas Minkevičius; Mantas Ragauskas; Jonas Matukas; Vilius Palenskis; Sandra Pralgauskaite; Dalius Seliuta; Irmantas Kašalynas; Gintaras Valušis

doi:10.1117/12.929501

15 October 2012 InGaAs bow-tie diodes for terahertz imaging: low frequency noise characterisation

Linas Minkevičius, Mantas Ragauskas, Jonas Matukas, Vilius Palenskis, Sandra Pralgauskaite, Dalius Seliuta, Irmantas Kašalynas, Gintaras Valušis

Author Affiliations +

Proceedings Volume 8496, Terahertz Emitters, Receivers, and Applications III; 849612 (2012) https://doi.org/10.1117/12.929501
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

Noise characteristics of bow-tie InGaAs diodes in forward and backward directions were measured in frequency range from 10 Hz to 20 kHz at room temperature. It was found that the spectral density of voltage fluctuations changes with frequency approximately as 1/f, indicating that origin of noise is superposition of generation and recombination processes in defects of the structure. It was determined that the dependence of spectral density of current fluctuation on current in backward and forward directions at different frequencies exhibits asymmetry which reflects non-uniform electric field distribution within the structure. As both noise and sensitivity increase with bias current, optimal conditions for device operation are discussed.

Citation Download Citation

Linas Minkevičius, Mantas Ragauskas, Jonas Matukas, Vilius Palenskis, Sandra Pralgauskaite, Dalius Seliuta, Irmantas Kašalynas, and Gintaras Valušis "InGaAs bow-tie diodes for terahertz imaging: low frequency noise characterisation", Proc. SPIE 8496, Terahertz Emitters, Receivers, and Applications III, 849612 (15 October 2012); https://doi.org/10.1117/12.929501

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