Generation of Circularly Polarized Continuous Terahertz Waves Using 650-nm Chaotic Multimode Semiconductor Laser

We developed a terahertz time-domain spectroscopy (THz-TDS) system with a chaotic continuous wave (CW) light source based on a 650-nm multimode laser diode. We consequently demonstrated that the photoexcitation of a spiral photoconductive antenna by the 650-nm chaotic laser generates CW THz radiatio...

Full description

Saved in:
Bibliographic Details
Main Authors: Mag-Usara, Valynn Katrine, Li, Jiajun, Agulto, Verdad C., Ohta, Izumi, Kuwashima, Fumiyoshi, Yoshimura, Masashi, Nakajima, Makoto
Format: Conference Proceeding
Language:English
Subjects:
5G mobile communication
6G mobile communication
Measurement by laser beam
Semiconductor device measurement
Semiconductor lasers
Spectroscopy
Spirals
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We developed a terahertz time-domain spectroscopy (THz-TDS) system with a chaotic continuous wave (CW) light source based on a 650-nm multimode laser diode. We consequently demonstrated that the photoexcitation of a spiral photoconductive antenna by the 650-nm chaotic laser generates CW THz radiation with comb-like sub-THz frequency spectrum, which has very narrow-spaced modes at 0.025-THz intervals. Further investigation confirmed that the CW THz signal is circularly polarized. With this work, we present the feasibility of an economical laser-based measurement system with resolution and features that are highly favorable for evaluating 5G and 6G components as well as for other various applications.
ISSN:2162-2035
DOI:10.1109/IRMMW-THz50927.2022.9896074