Bulletin of the American Physical Society
Four Corners Section 2022 Meeting
Volume 67, Number 14
Friday–Saturday, October 14–15, 2022; Albuquerque, New Mexico
Session F01: Poster Session
4:06 PM,
Friday, October 14, 2022
UNM
Room: PAIS 2nd Floor Mezzanine
Abstract: F01.00039 : Measurement of ultra-low photocurrents in metal-semiconductor-metal nanostructures: noise and sensitivity aspects*
Presenter:
Landon Schmucker
(University of New Mexico)
Authors:
Landon Schmucker
(University of New Mexico)
Vitaly Gruzdev
(University of New Mexico)
Payman Zarkesh-Ha
(University of New mexico)
Wolfgang Rudolph
(University of New Mexico)
Luke Emmert
(University of New Mexico)
Here, we report simulations of thermal noise of Au-GaN-Au planar structures with parameters very similar to those reported in available publications [1-3]. We compare simulation results with resistance and noise analysis of fabricated Au-GaN-Au devices. We demonstrate feasibility of substantial reduction of noise level by increase of resistivity of the structure. However, increase of resistivity reduces the laser-induced current required to detect and can drive it below the detection threshold. In the search for a non-trivial balance between reduction of noise and increase of photocurrent, we consider several combinations of geometrical and electric parameters of the structures.
[1] A. Schiffrin, et al, Nature, 493, 70-74 (2013).
[2] T. Paasch-Colberg, et al, Nature Photonics, 8, 214-218 (2014).
[3] S. Yu. Kruchinin, et al, Rev. Mod. Phys. 90, 021002 (2018).
*This work is partly supported by the Office of Naval Research via the Award No. N00014-21-1-2395
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