Novel photon blockade effects with exceptional points

新颖的光子封锁效果，亮点十足

• 批准号: 22KF0404
• 负责人: NORI FRANCO
• 金额: $ 1.47万
• 依托单位: Institute of Physical and Chemical Research
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2023
• 资助国家: 日本
• 起止时间: 2023-03-08 至 2025-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22KF0404/
• 关键词: photon blockad; non-Hermitian coupling; optical mode; phonon lasers

The key idea of this project is investigating novel photon blockade effects with exceptional points (EPs). Specifically, we have studied:(i) Exceptional photon blockade [Laser & Photonics Reviews 16, 2100430 (2022); first author]. We study photon blockade effects with exceptional points in a microcavity with non-dissipative non-Hermitian coupling between the countercirculating modes. We find that a purely quantum effect, known as single-photon blockade emerges due to EP-induced asymmetric coupling between the optical modes and the nonlinearity-induced anharmonic energy-level spacing.(ii) Loss-induced photon blockade [Physical Review A 106, 043715 (2022); co-corresponding author]. By harnessing EPs, we find that photon blockade can be revived with the help of loss in a nonlinear optical-molecule system. Also, a quantum switch between single-photon blockade and two-photon blockade can be realized by simply tuning the loss.(iii) Nonlinear multi-frequency phonon lasers [Nature Physics 19, 414-419 (2023); co-first author]. Phonon laser, as an analog of photon laser, exploits coherent amplifications of phonons. We report a multiple-frequency phonon laser in a levitated optomechanical system with optical gain.

本项目的主要思想是研究具有例外点的新型光子阻塞效应。具体来说，我们已经研究了：（i）异常光子阻断[Laser & Photonics Reviews 16，2100430（2022）;第一作者]。本文研究了微腔中的光子阻塞效应，在微腔中，各模之间存在非耗散非厄米耦合。我们发现，一个纯粹的量子效应，称为单光子封锁出现由于EP诱导的光学模式和非线性诱导的非谐波能级间距之间的非对称耦合。(ii)损失诱导的光子阻断[Physical Review A 106，043715（2022）;共同通讯作者]。通过利用EP，我们发现在非线性光学分子系统中，光子封锁可以在损耗的帮助下恢复。此外，通过简单地调节损耗，可以实现单光子封锁和双光子封锁之间的量子开关。(iii)非线性多频声子激光器[Nature Physics 19，414-419（2023）;共同第一作者]。声子激光是光子激光的一种模拟，它利用声子的相干放大。本文报道了一种在具有光学增益的悬浮光机系统中实现的多频声子激光器。

项目成果

Nonlinear multi-frequency phonon lasers with active levitated optomechanics

• DOI: 10.1038/s41567-022-01857-9
• 发表时间: 2022-10
• 期刊: Nature Physics
• 影响因子: 19.6
• 作者: Tengfang Kuang;Ran Huang;W. Xiong;Y. Zuo;Xiang Han;F. Nori;C. Qiu;Hui Luo;H. Jing;Guangzong Xiao

Loss-induced suppression, revival, and switch of photon blockade

• DOI: 10.1103/physreva.106.043715
• 发表时间: 2022-10
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Y. Zuo;Ran Huang;L. Kuang;Xun-Wei Xu;H. Jing