Ultra-high-Q photonic double-heterostructure nanocavity
Ultra-high-Q photonic double-heterostructure nanocavity
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DOI：
10.1038/nmat1320
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发表时间：
2005-03-01
期刊：
影响因子：
41.2
通讯作者：
Akahane, Y
中科院分区：
文献类型：
--
作者：
Song, BS;Noda, S;Akahane, Y
高品质因子光子纳米腔能将光子有效地限制在光波长尺度的空间内，由于其具有很强的光-物质相互作用，在光子学、通信、量子信息和腔量子电动力学等领域引起了广泛的关注。为了在二维光子晶体平板中实现高Q值纳米腔，提出了一个重要的设计准则。腔电场分布的形式应该缓慢变化，最理想的是由高斯函数描述，以抑制板外光子泄漏。然而，最大限度地减少光子泄漏的确切腔结构尚未建立。在这里，我们证明了形成光子双异质结构的重要性，这导致了实现具有600，000的极高Q因子的纳米腔，比以前的任何报道都高出一个数量级。我们还从理论上证明了在优化结构时可以获得大于20，000，000的Q值。
High-quality factor (Q) photonic nanocavities that strongly confine photons in volumes of optical-wavelength dimension are attracting much attention in various fields, including photonics,,,,, telecommunications,, quantum information and cavity quantum electrodynamics,, because a strong light–matter interaction is obtained. An important design rule has been proposed in an attempt to realize high-Qnanocavities in two-dimensional photonic-crystal slabs. The form of the cavity electric-field distribution should slowly vary, most ideally as described by a gaussian function, in order to suppress out-of-slab photon leakage. However, the exact cavity structure that minimizes photon leakage has not yet been established. Here, we demonstrate the importance of the formation of a photonic double-heterostructure, which has resulted in the realization of nanocavities with extremely high-Qfactors of 600,000, more than one order of magnitude higher than any previous reports,,,. We have also shown theoretically thatQ-factors greater than 20,000,000 may be obtained when optimizing the structure.