Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Investigation of backward THz generation in periodically poled stoichiometric LiTaO3

Not Accessible

Your library or personal account may give you access

Abstract

We have investigated characteristics of terahertz (THz) radiation generated by periodically poled stoichiometric LiTaO3 (PPSLT) gratings, based on optical rectification of ultrafast optical pulses in a backward configuration. The highest output power from the PPSLT gratings has reached nearly 100 μW. The advantages of LiTaO3 include its significantly reduced photorefractive effect, significantly lower poling electric field, and absence of two-photon absorption in the vicinity of 800 nm. Based on our analysis, effective second-order nonlinear coefficients are enhanced by factors of from 3.7 to 23, resulting in the enhanced output powers. Such enhancements originate from a polariton resonance at the frequency of 127cm1, which can be induced by nonlinear mixing of two transverse-optical phonons through strong anharmonicity of LiTaO3. In the second wafer having significantly shorter poling periods, we have observed the complete resonant peak. The linewidth of the THz output can be reduced by increasing the diameter of the pump beam. When the beam size is sufficiently small, the divergence of the THz radiation can be one of the factors preventing the THz power being efficiently coupled out of the crystal, resulting in the optimal beam diameters. As the diameter is increased, the THz peak frequency is slightly blue-shifted due to weak thermal effect.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Ultra-broadband optical parametric generation in periodically poled stoichiometric LiTaO3

Martin Levenius, Valdas Pasiskevicius, Fredrik Laurell, and Katia Gallo
Opt. Express 19(5) 4121-4128 (2011)

Temperature-controlled picosecond-pulsed high frequency second-harmonic generation by a periodically poled stoichiometric LiTaO3

Oleg A. Louchev, Hideki Hatano, Tomohiro Tsukihana, Satoshi Wada, Shunji Takekawa, and Kenji Kitamura
Opt. Express 23(4) 4847-4855 (2015)

Application of periodically poled stoichiometric LiTaO3 for efficient optical parametric chirped pulse amplification at 1 kHz

Fabian Rotermund, Chang Jun Yoon, Valentin Petrov, Frank Noack, Sunao Kurimura, Nan-Ei Yu, and Kenji Kitamura
Opt. Express 12(26) 6421-6427 (2004)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (10)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved