论文标题
非线性Gainp光子晶体纳米腔的热光动力学取决于光学模式曲线
Thermo-optical dynamics of a nonlinear GaInP photonic crystal nanocavity depend on the optical mode profile
论文作者
论文摘要
我们在$ _ {\ Mathrm {0.49}} $ pphotonic Crystal Membrane中测量模式间隙纳米腔的热光非线性的动力学。我们根据材料中的热传输和热光反应对这些结果进行建模。通过逐步调节光学输入功率，我们将非线性共振推向其响应曲线的稳定分支之间，从而导致双向开关。在双态开关时，观察到强度的过冲，然后观察到松弛尾巴。这样，测量了局部共振和离域共振的热弛豫。观察到衰减时间的显着差异，并与共振的光学模式曲线有关。我们使用热光模型来重现观察到的瞬态行为，实现了非持续性非线性，并考虑到共振的光学模式曲线，如实验测量。
We measure the dynamics of the thermo-optical nonlinearity of both a mode-gap nanocavity and a delocalized mode in a Ga$_{\mathrm{0.51}}$In$_{\mathrm{0.49}}$P photonic crystal membrane. We model these results in terms of heat transport and thermo-optical response in the material. By step-modulating the optical input power we push the nonlinear resonance to jump between stable branches of its response curve, causing bistable switching. An overshoot of the intensity followed by a relaxation tail is observed upon bistable switching. In this way, the thermal relaxation of both the localized resonance and the delocalized resonance is measured. Significant difference in decay time is observed and related to the optical mode profile of the resonance. We reproduce the observed transient behavior with our thermo-optical model, implementing a non-instantaneous nonlinearity, and taking into account the optical mode profile of the resonance, as experimentally measured.
