arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1009.0693physics.optics
收藏

InGaAs单量子阱增益耦合银开口环谐振器阵列

Arrays of Ag split-ring resonators coupled to InGaAs single-quantum-well gain

Nina Meinzer, Matthias Ruther, Stefan Linden, Costas M. Soukoulis, Galina Khitrova, Joshua Hendrickson, Joshua D. Olitsky, Hyatt M. Gibbs, Martin Wegener

摘要:

我们研究了工作在1.5 μm波长的银开口环谐振器阵列与分子束外延生长的单个12.7 nm薄InGaAs量子阱的耦合,该量子阱与晶片表面的距离仅为4.8 nm。样品保持在液氦温度下,并在泵浦-探测结构中被中心波长为0.81 μm的强飞秒光脉冲泵浦。我们观察到更大的相对透射率的变化(高达约8%)的开口环谐振器阵列相比,裸量子阱(不超过1-2%)。我们还观察到一个更快的时间衰减分量的差分透射率信号的15 ps的情况下的分裂环谐振器耦合到量子阱相比,裸量子阱的情况下,我们发现约0.7 ns。后一种观察归因于Purcell效应,该效应产生于开口环谐振器与量子阱增益的倏逝波耦合。所有的实验结果进行了比较,最近推出的分析玩具模型,占这种倏逝波耦合,导致优秀的整体定性协议。

英文摘要:

We study arrays of silver split-ring resonators operating at around 1.5-μm wavelength coupled to an MBE-grown single 12.7-nm thin InGaAs quantum well separated only 4.8 nm from the wafer surface. The samples are held at liquid-helium temperature and are pumped by intense femtosecond optical pulses at 0.81-μm center wavelength in a pump-probe geometry. We observe much larger relative transmittance changes (up to about 8%) on the split-ring-resonator arrays as compared to the bare quantum well (not more than 1-2%). We also observe a much more rapid temporal decay component of the differential transmittance signal of 15 ps for the case of split-ring resonators coupled to the quantum well compared to the case of the bare quantum well, where we find about 0.7 ns. The latter observation is ascribed to the Purcell effect that arises from the evanescent coupling of the split-ring resonators to the quantum-well gain. All experimental results are compared with a recently introduced analytical toy model that accounts for this evanescent coupling, leading to excellent overall qualitative agreement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑