CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 12555 > Article
Paper
20 January 2023 Broadband THz Bessel beam generation based on axicon
Zongyu Cui, LIjuan Li, Jiaojiao Ren, Dandan Zhang, Jian Gu, Jingjing Yu
Author Affiliations +
Proceedings Volume 12555, AOPC 2022: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications; 1255504 (2023) https://doi.org/10.1117/12.2651732
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China
Abstract
In this paper, a terahertz axicon (n=1. 55) with a base angle of 10 degrees is designed, introduced into a Terahertz Time domain spectroscopy(THz-TDS) (0. 1-1THz), and a transmission beam scanning experiment is built. At each waveform of the raster scan of each section, the spectrum is calculated using a Fast Fourier Transform (FFT) to obtain the beam cross section for each frequency. The measured central beam width at different frequencies varies between 7mm and 2. 5mm, and the distance between the measurement plane and the tip of the axicon is 80mm; by numerically processing the information of each plane, the beam reconstruction results at different frequencies can be obtained. From the analysis results, it can be seen that the THz-TDS can generate non-diffracting beams with depth of field exceeding 160mm via an axicon with a base angle of 10 degrees, the central spot width does not exceed 7 mm, and there are almost no side lobes. The results show that the Bessel beam can provide a significant depth of field expansion capability for the THz-TDS, which will have a positive impact on the non-destructive testing of samples with large thickness and uncertain defect locations.
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Zongyu Cui, LIjuan Li, Jiaojiao Ren, Dandan Zhang, Jian Gu, and Jingjing Yu "Broadband THz Bessel beam generation based on axicon", Proc. SPIE 12555, AOPC 2022: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications, 1255504 (20 January 2023); https://doi.org/10.1117/12.2651732
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
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
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 5 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Axicons
Bessel beams
Terahertz spectroscopy
Terahertz radiation
Antennas
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top