接触缺陷纳米腔中光子带隙现象的电探测
Electrically probing photonic bandgap phenomena in contacted defect nanocavities
摘要：
我们展示了一个电调谐的二维光子晶体纳米腔包含InAs自组装量子点。光致发光和电致发光测量相结合，探测腔模结构，并证明了局部电接触的量子点。作为电场的函数进行的测量使我们能够探测发射到修改的光子环境中的量子点内部的光生载流子的捕获、弛豫和复合动力学。此外，二维光子晶体探测空间相关的光电流光谱，表明在光子晶体环境内的量子点的局部辐射寿命的3.5倍的增强。
英文摘要：
We demonstrate an electrically tunable two dimensional photonic crystal nanocavity containing InAs self assembled quantum dots. Photoluminescence and electroluminescence measurements are combined to probe the cavity mode structure and demonstrate a local electrical contact to the quantum dots. Measurements performed as a function of the electric field enable us to probe the capture, relaxation and recombination dynamics of photogenerated carriers inside the quantum dots emitting into a modified photonic environment. Furthermore, the two dimensional photonic crystal is probed by spatially dependent photocurrent spectroscopy indicating a 3.5x enhancement of the local radiative lifetime of the QDs inside the photonic crystal environment.
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