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Nonlinear negative refraction by difference frequency generation
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DOI：10.1063/1.4948974.png)
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摘要
En 中文
Negative refraction has attracted much interest for its promising capability in imaging applications. Such an effect can be implemented by negative index meta-materials, however, which are usually accompanied by high loss and demanding fabrication processes. Recently, alternative nonlinear approaches like phase conjugation and four wave mixing have shown advantages of low-loss and easy-to-implement, but associated problems like narrow accepting angles can still halt their practical applications. Here, we demonstrate theoretically and experimentally a scheme to realize negative refraction by nonlinear difference frequency generation with wide tunability, where a thin Beta barium borate slice serves as a negative refraction layer bending the input signal beam to the idler beam at a negative angle. Furthermore, we realize optical focusing effect using such nonlinear negative refraction, which may enable many potential applications in imaging science. Published by AIP Publishing.
Keyword:
OPTICAL-PARAMETRIC-AMPLIFICATION
PHASE-CONJUGATION
INDEX
MEDIA
LENS
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期刊
IF:
3.6
论文数:
10.4W
被引数:
17.8W
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