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Abstract
An all-optical delay line based on the lateral drift of cavity solitons in semiconductor microresonators is proposed and experimentally demonstrated. The functionalities of the device proposed as well as its performance is analyzed and compared with recent alternative methods based on the decrease of group velocity in the vicinity of resonances. We show that the current limitations can be overcome using broader devices with tailored material responses.
Highlights
Quantum photonic applications, such as photonic quantum computing, quantum communication, and quantum sensing, require highly sophisticated nonclassical light sources and high-efficiency single-photon detectors
Singlephoton emission from single quantum emitters has been first demonstrated for atoms1 and ions,2 but the family of quantum emitters has been rapidly expanding during the turn of the millennium, and nowadays it includes atoms, ions, molecules, color centers in solids, quantum dots, carbon nanotubes, and defects in two-dimensional systems
Current state-of-the-art superconducting nanowire single photon detectors (SNSPDs) meet many of the aforementioned requirements: they combine near-unity detection efficiency over a wide spectral range, low dark counts, and short dead times and deliver picosecond time resolution
Summary
Quantum photonic applications, such as photonic quantum computing, quantum communication, and quantum sensing, require highly sophisticated nonclassical light sources and high-efficiency single-photon detectors. A broadband nanowire optical nanocavity is presented by Kotal et al including an acceleration of spontaneous emission.11 Ahn et al investigate another broadband design consisting of a combination of a planar microcavity and a solid immersion lens for efficient broad band coupling.12 In the invited article of Seidelmann et al, a four-level quantum emitter-cavity system is proposed for a timedependent switching of the photon entanglement type by changing the driving strength of a continuously driven external laser.13 An essential building block for the realization of on-chip quantum photonics is the integration of efficient on-demand single-photon sources within waveguide circuits.
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