Metalens array for quantum random number

Yubin Fan, Shufan Chen, Xiaoyuan Liu, Xiaoyu Che, Xiaodong Qiu, Mu Ku Chen, Din Ping Tsai*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

1 Citation (Scopus)
15 Downloads (CityUHK Scholars)

Abstract

Quantum random number generation (QRNG) leveraging intrinsic quantum uncertainty has attracted significant interest in the field of integrated photonic architecture, with applications in quantum cryptography, tests of quantum nonlocality, and beyond. The demand for compact, low-energy consumption, robust, fast, and cost-effective QRNGs integrated into photonic chips is highlighted, whereas most previous works focused on bulk optics. Here, based on the metalens array entangled source, we experimentally realized a miniaturized, high-dimensional quantum random number generator via a meta-device without post-randomness extraction. Specifically, the device has a high-density output with 100 channels per square millimeter. This chip-scale quantum randomness source can obtain random number arrays without post-randomness extraction and enable compact integration for quantum applications needing secure keys or randomness. Our approach demonstrates potential in secure key generation and randomness for quantum applications. © 2024 Author(s).
Original languageEnglish
Article number031418
JournalApplied Physics Reviews
Volume11
Issue number3
Online published10 Sept 2024
DOIs
Publication statusPublished - Sept 2024

Funding

This work is supported by the University Grants Committee/Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. AoE/P-502/20, CRF Project: C1015-21E; C5031-22G, GRF Project: CityU15303521; CityU11305223; CityU11310522; CityU11300123, and Germany/Hong Kong Joint Research Scheme: G-CityU 101/22), City University of Hong Kong (Project No. 9380131, 9610628, and 7005867), and the National Natural Science Foundation of China (Project No. 62375232).

Publisher's Copyright Statement

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