从硅双色光子晶体腔产生纠缠光子对

IF 5.4 1区 物理与天体物理 Q1 OPTICS APL Photonics Pub Date : 2024-01-16 DOI:10.1063/5.0170292
Andrea Barone, Marco Clementi, Thanavorn Poempool, Alessandro Marcia, Daniele Bajoni, Marco Liscidini, Dario Gerace, Thomas Fromherz, Matteo Galli
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引用次数: 0

摘要

集成量子光子学利用在芯片上产生非经典光状态来实现量子设备的关键功能。通常情况下,这种非经典状态的产生依赖于耳语廊模式谐振器,如集成光学微环,它能提高底层自发非线性过程的效率。虽然这类谐振器在最大限度地提高不同谐振模式之间的时间限制或空间重叠方面表现出色,但它们通常具有较大的模式体积,对器件的效率和占地面积造成了内在限制。在这里,我们设计了一种基于硅光子晶体腔的时间能量纠缠光子对源,并在完全 CMOS 兼容的平台上实现。在该器件中,共振增强的自发四波混合在电信 C 波段的能量守恒条件下将泵浦光子对转换为信号/惰性光子对。谐振器的设计基于有效的双色约束势能,使其能够实现多达九个频率接近等距的模式,同时保留较小的模式体积,整个芯片(包括光栅耦合器和接入波导)在硅衬底平台上一次运行即可制造完成。除了展示高效的光子对生成外,我们还实现了弗朗森型干涉实验,展示了信号光子和惰光子之间的纠缠,贝尔不等式违反超过五个标准偏差。在 CMOS 兼容的集成结构中,高生成效率与小器件占用空间相结合,为在全硅光子平台上实现紧凑型量子光源开辟了道路。
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Generation of entangled photon pairs from a silicon bichromatic photonic crystal cavity
Integrated quantum photonics leverages the on-chip generation of nonclassical states of light to realize key functionalities of quantum devices. Typically, the generation of such nonclassical states relies on whispering gallery mode resonators, such as integrated optical micro-rings, which enhance the efficiency of the underlying spontaneous nonlinear processes. While these kinds of resonators excel in maximizing either the temporal confinement or the spatial overlap between different resonant modes, they are usually associated with large mode volumes, imposing an intrinsic limitation on the efficiency and footprint of the device. Here, we engineer a source of time-energy entangled photon pairs based on a silicon photonic crystal cavity, implemented in a fully CMOS-compatible platform. In this device, resonantly enhanced spontaneous four-wave mixing converts pump photon pairs into signal/idler photon pairs under the energy-conserving condition in the telecommunication C-band. The design of the resonator is based on an effective bichromatic confinement potential, allowing it to achieve up to nine close-to-equally spaced modes in frequency, while preserving small mode volumes, and the whole chip, including grating couplers and access waveguides, is fabricated in a single run on a silicon-on-insulator platform. Besides demonstrating efficient photon pair generation, we also implement a Franson-type interference experiment, demonstrating entanglement between signal and idler photons with a Bell inequality violation exceeding five standard deviations. The high generation efficiency combined with the small device footprint in a CMOS-compatible integrated structure opens a pathway toward the implementation of compact quantum light sources in all-silicon photonic platforms.
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来源期刊
APL Photonics
APL Photonics Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
10.30
自引率
3.60%
发文量
107
审稿时长
19 weeks
期刊介绍: APL Photonics is the new dedicated home for open access multidisciplinary research from and for the photonics community. The journal publishes fundamental and applied results that significantly advance the knowledge in photonics across physics, chemistry, biology and materials science.
期刊最新文献
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