CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 12143 > Article
Presentation + Paper
25 May 2022 THz generation in GaSe crystal pumped below and around the bandgap
Dongwei Zhai, Emilie Hérault, Frédéric Garet, Jean-Louis Coutaz
Author Affiliations +
Proceedings Volume 12143, Nonlinear Optics and its Applications 2022; 121430D (2022) https://doi.org/10.1117/12.2624406
Event: SPIE Photonics Europe, 2022, Strasbourg, France
Abstract
In this paper, we study THz generation by optical rectification in GaSe crystal pumped under normal incidence below and around the bandgap. We compared the generated THz signal from 3 crystals with different thicknesses (1 mm, 0.1 mm and 0.02 mm) when pumped with femtosecond laser pulse whose wavelength is tuned from 800 down to 540 nm. With the 1-mm thick crystal, we observe a pronounced THz emission peak when the pumping photon energy is 1.77 eV because of better phase matching conditions. We also notice that the efficiency improvement is more pronounced for higher THz frequencies. The experimental data are nicely fitted by our OR generation model. Since the 2 other crystals are thin, we don’t observe phase matching impact on the signal. When pumping around the bandgap, we detect another, smaller, THz emission peak, due to nonlinearity enhancement this time.
Conference Presentation
© (2022) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Dongwei Zhai, Emilie Hérault, Frédéric Garet, and Jean-Louis Coutaz "THz generation in GaSe crystal pumped below and around the bandgap", Proc. SPIE 12143, Nonlinear Optics and its Applications 2022, 121430D (25 May 2022); https://doi.org/10.1117/12.2624406
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
 4 PAGES + PRESENTATION
DOWNLOAD PAPER SAVE TO MY LIBRARY
WATCH
PRESENTATION
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Terahertz radiation
Crystals
Nonlinear crystals
Frequency conversion
Phase matching
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top