OPTICAL SECOND HARMONIC GENERATION IN FORM OF COHERENT CERENKOV RADIATION FROM A THIN‐FILM WAVEGUIDE
OPTICAL SECOND HARMONIC GENERATION IN FORM OF COHERENT CERENKOV RADIATION FROM A THIN‐FILM WAVEGUIDE
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DOI：
10.1063/1.1653265
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发表时间：
1970-11
影响因子：
4
通讯作者：
P. Tien;R. Ulrich;R. Martin
中科院分区：
文献类型：
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作者：
P. Tien;R. Ulrich;R. Martin
本文报道了相干切伦科夫辐射形式的光学二次谐波产生。1.06 μm的基波在薄膜光波导中传播，该薄膜光波导只是真空沉积在单晶ZnO衬底上的ZnS薄膜。在衬底中激发的非线性偏振具有超过在衬底材料中自由传播的辐射的相速度的相速度。因此，它作为观察到的切伦科夫辐射的来源。
We report optical second harmonic generation in form of coherent Cerenkov radiation. The fundamental wave at 1.06 μm propagates in a thin‐film optical waveguide which is simply a ZnS film vacuum‐deposited on a single‐crystal ZnO substrate. The nonlinear polarization excited in the substrate has a phase velocity exceeding that of radiation propagating freely in the substrate material. It thus acts as the source of the observed Cerenkov radiation.