Analysis of the THz Responsivity of AlGaN/GaN HEMTs by Means of Monte Carlo Simulations

In this work, by means of Monte Carlo (MC) simulations, the current responsivity of AlGaN/GaN HEMTs operating as zero-bias detectors is analyzed, reaching the THz frequency range. Two approaches are used for the calculation of the responsivity, trying to get physical information on the detection mec...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on electron devices 2024-08, Vol.71 (8), p.4556-4562
Main Authors: Garcia-Sanchez, Sergio, Iniguez-de-la-Torre, Ignacio, Paz-Martinez, Gaudencio, Artillan, Philippe, Gonzalez, Tomas, Mateos, Javier
Format: Article
Language:English
Subjects:
Analytical model
Detectors
Electrons
Engineering Sciences
GAN
HEMTs
high-electron mobility transistor (HEMT)
Logic gates
Micro and nanotechnologies
Microelectronics
microwave detector
MODFETs
Monte Carlo (MC) simulations
power detector
responsivity model
terahertz (THz) detectors
Terahertz communications
Wide band gap semiconductors
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, by means of Monte Carlo (MC) simulations, the current responsivity of AlGaN/GaN HEMTs operating as zero-bias detectors is analyzed, reaching the THz frequency range. Two approaches are used for the calculation of the responsivity, trying to get physical information on the detection mechanisms from the comparison of their respective results. First, we determine the responsivity directly from the MC values of dc drain current shift originated by an input ac drain voltage excitation. As second approach, the responsivity is estimated from a closed-form expression involving the MC calculation of both the dc I-V curves of the transistor (to determine Taylor expansion coefficients) and the ac response in terms of the Y parameters (to be converted into S parameters). Both approaches coincide at low frequency, but the closed-form expression starts to deviate from the correct result at frequencies around 1 THz. Moreover, a modest plasma resonance is visible in the 2-5-THz range.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2024.3413713