二次、三次和四次谐波产生作为多色光源的电信波长激发的铋铁氧体介电纳米颗粒
Bismuth Ferrite Dielectric Nanoparticles Excited at Telecom Wavelengths as Multicolor Sources by Second, Third, and Fourth Harmonic Generation
摘要：
我们证明了从一个单一的电介质铋铁氧体纳米粒子在1560 nm的电信光纤激光器激发的同时产生的第二，第三和第四谐波。我们首先表征与不同的非线性阶数的光谱，激发强度的依赖性，和相对信号强度的信号。Successfully，偏振分辨的三个谐波的发射曲线的基础上，我们讨论的磁化率张量分量在不同的订单的相互作用，我们展示了如何偏振可以被用来作为一个光学手柄来控制相对的频率转换性能。
英文摘要：
We demonstrate the simultaneous generation of second, third, and fourth harmonic from a single dielectric Bismuth Ferrite nanoparticle excited by a telecom fiber laser at 1560 nm. We first characterize the signals associated with different nonlinear orders in terms of spectrum, excitation intensity dependence, and relative signal strengths. Successively, on the basis of the polarization-resolved emission curves of the three harmonics, we discuss the interplay of susceptibility tensor components at the different orders and we show how polarization can be used as an optical handle to control the relative frequency conversion properties.
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