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Updated: Jun 8, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Effects of uncertain phase-matching wave vectors of rotating fan-out type poled LiNbO3 on THz generation
Chul Kang1, Yeung Lak Lee, Changsoo Jung
1Nanophotonics Laboratory, Advanced Photonics Research Institute, GIST, Gwangju, 500-712, Korea.
Abstract:
We investigated terahertz pulses from a rotating fan-out type poled lithium niobate (LiNbO(3)) pumped by femtosecond laser pulses. In particular, the rotating fan-out type poled sample produces an uncertain phase-matching wave vector perpendicular to input laser pulses. Such a wave vector allowed us to observe terahertz pulses normally unobservable from bulk or periodically poled LiNbO(3) at large rotation angles because of the terahertz wave critical angle of LiNbO(3). Further, we explained center frequency dependence on rotation angles by difference frequency generation process with the uncertain wave vector. We also discussed bandwidth dependence and terahertz pulse power regarding rotation angles.
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