Yamaguchi Makoto, Asano Takashi, Noda Susumu
Department of Electronic Science and Engineering, Kyoto University, Katsura, Kyoto, Japan.
Opt Express. 2008 Oct 27;16(22):18067-81. doi: 10.1364/oe.16.018067.
Solid-state cavity quantum-electrodynamics (QED) has great potential owing to advances such as coupled systems combining a nanocavity and a quantum dot (QD). These systems involve two photon-emission mechanisms: the Purcell effect in the weak coupling regime and vacuum Rabi-splitting in the strong coupling regime. In this paper, we describe a third emission mechanism based on the quantum anti-Zeno effect (AZE) induced by the pure-dephasing in a QD. This is significantly enhanced by the inherent characteristics of the nanocavity. This mechanism explains the origin of strong photon emission at a cavity mode largely detuned from a QD, previously considered a counterintuitive, prima facie non-energy-conserving, light-emission phenomenon. These findings could help in controlling the decay and emission characteristics of solid-state cavity QED, and developing solid-state quantum devices.
固态腔量子电动力学(QED)由于诸如结合了纳米腔和量子点(QD)的耦合系统等进展而具有巨大潜力。这些系统涉及两种光子发射机制:弱耦合 regime 中的珀塞尔效应和强耦合 regime 中的真空拉比分裂。在本文中,我们描述了一种基于量子点中纯退相诱导的量子反芝诺效应(AZE)的第三种发射机制。这通过纳米腔的固有特性得到显著增强。这种机制解释了在与量子点大幅失谐的腔模处强光子发射的起源,此前这被认为是一种违反直觉的、表面上不守恒能量的发光现象。这些发现有助于控制固态腔QED的衰减和发射特性,并开发固态量子器件。