High Efficiency Interdigitated Terahertz Photoconductive Antenna Integrated with Cylindrical Lens Array

Cylindrical lens array (CLA) and plasmonic nano-grating structures were integrated with a large area interdigitated photoconductive antenna (PCA) for high-efficiency terahertz (THz) emitter applications. The peak-to-peak amplitude of THz radiation pulse from the CLA-integrated plasmonic PCA was enha...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on terahertz science and technology 2023-11, Vol.13 (6), p.1-7
Main Authors: Lee, Gyejung, Son, Byungwoo, Ko, Do-Kyeong, Hong, Sung-Min, Lee, Sungbae, Jang, Jae-Hyung
Format: Article
Language:English
Subjects:
Absorption
Antenna arrays
Carrier density
Cylindrical antennas
Cylindrical lens array
Electric fields
Electrodes
Emitters
Lenses
Optical device fabrication
Optical pumping
Optical reflection
Photoconductive antenna
Photoconductive switch
Plasmonics
Plasmons
Principal component analysis
Terahertz devices
Terahertz emitter
Terahertz frequencies
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:Cylindrical lens array (CLA) and plasmonic nano-grating structures were integrated with a large area interdigitated photoconductive antenna (PCA) for high-efficiency terahertz (THz) emitter applications. The peak-to-peak amplitude of THz radiation pulse from the CLA-integrated plasmonic PCA was enhanced 5.5 times compared with that from the conventional PCA without the plasmonic nano-grating and CLA. The highly localized electric field near the nanoscale grating shows enhanced optical absorption near the plasmonic nano-grating. The cylindrical lens array focuses incident pulse laser light onto the interlaced active area to avoid destructive interference of the emitted THz waves. The enhanced optical absorption near the plasmonic nano-grating and the higher degree of laser light utilization increased the photo-generated carrier density at the device surface, leading to enhanced THz radiation power.
ISSN:2156-342X
2156-3446
DOI:10.1109/TTHZ.2023.3301848