Brunstein M, Braive R, Hostein R, Beveratos A, Rober-Philip I, Sagnes I, Karle T J, Yacomotti A M, Levenson J A, Moreau V, Tessier G, De Wilde Y
Laboratoire de Photonique et de Nanostructures (CNRS UPR20), Route de Nozay, 91460 Marcoussis, France.
Opt Express. 2009 Sep 14;17(19):17118-29. doi: 10.1364/OE.17.017118.
Linear and non-linear thermo-optical dynamical regimes were investigated in a photonic crystal cavity. First, we have measured the thermal relaxation time in an InP-based nano-cavity with quantum dots in the presence of optical pumping. The experimental method presented here allows one to obtain the dynamics of temperature in a nanocavity based on reflectivity measurements of a cw probe beam coupled through an adiabatically tapered fiber. Characteristic times of 1.0+/-0.2 micros and 0.9+/-0.2 micros for the heating and the cooling processes were obtained. Finally, thermal dynamics were also investigated in a thermo-optical bistable regime. Switch-on/off times of 2 micros and 4 micros respectively were measured, which could be explained in terms of a simple non-linear dynamical representation.
在光子晶体腔中研究了线性和非线性热光动力学机制。首先，我们测量了在光泵浦存在下，基于InP的含量子点的纳米腔中的热弛豫时间。这里介绍的实验方法能够基于通过绝热锥形光纤耦合的连续波探测光束的反射率测量，获得纳米腔中温度的动态变化。加热和冷却过程的特征时间分别为1.0±0.2微秒和0.9±0.2微秒。最后，还在热光双稳机制下研究了热动力学。分别测量到开启/关闭时间为2微秒和4微秒，这可以用一个简单的非线性动力学模型来解释。
