Efficient Cherenkov-Type Phase-Matched Widely Tunable Terahertz-Wave Generation via an Optimized Pump Beam Shape

被引：24
|
作者：
Shibuya, Takayuki [1 ]
Tsutsui, Toshihiro [1 ]
Suizu, Koji [1 ]
Akiba, Takuya [1 ]
Kawase, Kodo [1 ]
机构：
[1] Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan
来源：
APPLIED PHYSICS EXPRESS | 2009年 / 2卷 / 03期
关键词：
DIFFERENCE-FREQUENCY-GENERATION; POLED LITHIUM-NIOBATE; CRYSTAL; RADIATION; LINBO3; GUIDE;
D O I：
10.1143/APEX.2.032302
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrated a Cherenkov-type phase-matching method for monochromatic THz-wave generation using the difference frequency generation process with a lithium niobate crystal. In Cherenkov-type phase-matching process, when the bulk lithium niobate crystal is used, the beam diameter of pump waves causes the phase mismatching for generating THz-wave. We decreased the phase-mismatch by optimizing the pump beam shape with cylindrical lenses, and ensured high conversion efficiency especially in the high-frequency region. We successfully generated monochromatic THz waves across the 0.2- to 4.0-THz range with a simple configuration. (C) 2009 The Japan Society of Applied Physics DOI: 10.1143/APEX.2.032302
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页数：2
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