Achieving Robust Single-Photon Blockade with a Single Nanotip

• URL: http://arxiv.org/abs/2412.19608v1
• Date: Fri, 27 Dec 2024 12:09:30 GMT
• Title: Achieving Robust Single-Photon Blockade with a Single Nanotip
• Authors: Jian Tang, Yun-Lan Zuo, Xun-Wei Xu, Ran Huang, Adam Miranowicz, Franco Nori, Hui Jing,
• Abstract summary: We show that single-photon blockade against backscattering loss can be achieved by introducing a nanotip near a Kerr nonlinear resonator with intrinsic defects. Our work sheds new light on protecting and engineering fragile quantum devices against imperfections, for applications in robust single-photon sources and backscattering-immune quantum devices.
• Score: 11.13448121762526
• License:
• Abstract: Backscattering losses, due to intrinsic imperfections or external perturbations that are unavoidable in optical resonators, can severely affect the performance of practical photonic devices. In particular, for quantum single-photon devices, robust quantum correlations against backscattering losses, which are highly desirable for diverse applications, have remained largely unexplored. Here, we show that single-photon blockade against backscattering loss, an important purely quantum effect, can be achieved by introducing a nanotip near a Kerr nonlinear resonator with intrinsic defects. We find that the quantum correlation of single photons can approach that of a lossless cavity even in the presence of strong backscattering losses. Moreover, the behavior of such quantum correlation is distinct from that of the classical mean-photon number with different strengths of the nonlinearity, due to the interplay of the resonator nonlinearity and the tip-induced optical coupling. Our work sheds new light on protecting and engineering fragile quantum devices against imperfections, for applications in robust single-photon sources and backscattering-immune quantum devices.

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