Dynamic control of the Q factor in a photonic crystal nanocavity
Dynamic control of the Q factor in a photonic crystal nanocavity
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DOI：
10.1038/nmat1994
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发表时间：
2007-11-01
期刊：
影响因子：
41.2
通讯作者：
Noda, Susumu
中科院分区：
文献类型：
--
作者：
Tanaka, Yoshinori;Upham, Jeremy;Noda, Susumu
高品质（Q）因子光子晶体纳米腔（1-8）是当前非常感兴趣的焦点，因为它们可以将光子强限制在微小空间中。已经实现了具有高达2，000，000和立方波长的模态体积的NSQQ因子的纳米腔（8）。如果Q因子可以在光子的寿命内动态控制，那么在物理学和工程学领域将有望取得重大进展，例如光的减慢和/或停止（9，10）和量子信息处理（11，12）。对于这些应用，在这样的时间尺度上的纳米腔系统中的光子的转移、存储和交换是非常期望的。在这里，我们提出了第一个演示的动态控制的Q因子，通过构建一个系统组成的纳米腔，波导与非线性光学响应和光子晶体异质界面镜。纳米腔的Q因子在皮秒内成功地从近似3，000改变到近似12，000。
High-quality ( Q) factor photonic-crystal nanocavities(1-8) are currently the focus of much interest because they can strongly confine photons in a tiny space. Nanocavities with ultrahigh Q factors of up to 2,000,000 and modal volumes of a cubic wavelength have been realized(8). If the Q factor could be dynamically controlled within the lifetime of a photon, significant advances would be expected in areas of physics and engineering such as the slowing and/or stopping of light(9,10) and quantum-information processing(11,12). For these applications, the transfer, storage and exchange of photons in nanocavity systems on such a timescale are highly desirable. Here, we present the first demonstration of dynamic control of the Q factor, by constructing a system composed of a nanocavity, a waveguide with nonlinear optical response and a photonic-crystal heterointerface mirror. The Q factor of the nanocavity was successfully changed from similar to 3,000 to similar to 12,000 within picoseconds.