Tunable Slow Light of 1.3 µm Region in Quantum Dots at Room Temperature
Tunable Slow Light of 1.3 µm Region in Quantum Dots at Room Temperature
复制标题
室温下量子点中 1.3 µm 区域的可调谐慢光
DOI：
10.1143/jjap.46.2369
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发表时间：
2006
影响因子：
1.5
通讯作者：
Y. Shibata
中科院分区：
文献类型：
--
作者：
H. Gotoh;Shu‐Wei Chang;S. Chuang;H. Okamoto;Y. Shibata
我们报道了在室温下观察到的量子点（QDs）中1.3µm区域的可调谐慢光（slowlight）。在以InAs量子点为有源区的波导中，采用反传播泵浦-探针法测量了光的传输时间。对于500微米长的样品，最大减速因子为2.5。这相当于波导中的传播时间延长了2.5倍。通过调整泵浦光束可以很好地控制减速。这种泵浦功率对减速因子的依赖性与相干种群振荡（CPO）的理论预测吻合得很好。我们还报道了一种实现更大慢光效应的方法。
We report tunable slow light (slowlight) in the 1.3 µm region in quantum dots (QDs) observed at room temperature. The light transmission times are measured by the counter-propagating pump-and-probe method in waveguides with InAs QDs as active regions. The maximum slowdown factor is 2.5 for a 500-µm-long sample. This corresponds to a 2.5 times longer propagation time in the waveguide. The slowdown can be well controlled by tuning the pump beam. This pump power dependence of the slowdown factor agrees well with theoretical predictions obtained by coherent population oscillation (CPO). We also report a method that realizes larger slow light effects.