Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology , Wuhan 430074, China.
Nano Lett. 2013 Sep 11;13(9):4224-9. doi: 10.1021/nl401921s. Epub 2013 Aug 14.
We report a direct observation on the laterally emitted surface second harmonic generation (SHG) in a single ZnTe nanowire. The highly directional surface SHG radiates vertically to the nanowire growth-axis with a high conversion efficiency of 5 × 10(-6) and a low divergence angle of 4°. Polarization state, emission intensity, and direction of the surface SHG are found to be dependent on the polarization of the pumping laser, which is further confirmed by numerical simulations. The laterally emitted surface SHG with a high efficiency and low divergence angle has great potential for short-wavelength nanolasers, nonlinear microscopic imaging, and polarization-dependent photonic integrating.
我们报告了在单个 ZnTe 纳米线中侧向发射的表面二次谐波产生（SHG）的直接观察结果。高度定向的表面 SHG 以 5×10(-6)的高转换效率和 4°的低发散角垂直于纳米线生长轴辐射。发现表面 SHG 的偏振状态、发射强度和方向取决于泵浦激光的偏振，这通过数值模拟进一步得到证实。具有高效率和低发散角的侧向发射表面 SHG 在短波长纳米激光器、非线性微观成像和偏振相关光子集成方面具有巨大的潜力。
