Enhancing Photon Indistinguishability of Spectrally Mismatched Single Photons by Cavity Floquet Engineering
Authors:
J. W. Yu,
X. Q. Zhou,
Z. B. Ni,
X. T. Cheng,
Y. Zhao,
H. H. Zhu,
C. H. Li,
F. Liu,
C. Y. Jin
Abstract:
We theoretically propose a scheme to enhance the photon indistinguishability of spectrally mismatched single photons via Floquet-engineered optical frequency combs (OFCs) in cavity quantum electrodynamic systems. By periodically modulating two distinct single-photon states under a modulation frequency which is exactly equal to the spectral mismatch of two cavity modes, a pair of single-photon freq…
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We theoretically propose a scheme to enhance the photon indistinguishability of spectrally mismatched single photons via Floquet-engineered optical frequency combs (OFCs) in cavity quantum electrodynamic systems. By periodically modulating two distinct single-photon states under a modulation frequency which is exactly equal to the spectral mismatch of two cavity modes, a pair of single-photon frequency-comb (SPFC) states is prepared energy-conservatively based on full unitary operations. The two states show high indistinguishability with an ideal $g^{(2)}_\mathrm{HOM}(0)$ down to zero due to the superposition of intensity-matched single-photon states coherently distributed across the teeth of the combs.
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Submitted 3 July, 2025;
originally announced July 2025.
All-optical control of the spontaneous emission of quantum dots using coupled-cavity quantum electrodynamics
Authors:
C. Y. Jin,
M. Y. Swinkels,
R. Johne,
T. B. Hoang,
L. Midolo,
P. J. van Veldhoven,
A. Fiore
Abstract:
We demonstrate the remote all-optical control of the spontaneous emission (SE) of quantum dots using coupled photonic crystal cavities. By spectrally tuning a Fabry-Perot cavity in resonance with a target cavity, the quality factor and the local density of states experienced by emitters in the target cavity are modified, leading to a change in the SE rate. From the theoretical analysis of the coup…
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We demonstrate the remote all-optical control of the spontaneous emission (SE) of quantum dots using coupled photonic crystal cavities. By spectrally tuning a Fabry-Perot cavity in resonance with a target cavity, the quality factor and the local density of states experienced by emitters in the target cavity are modified, leading to a change in the SE rate. From the theoretical analysis of the coupled-cavity quantum electrodynamics system, the SE rate change can be higher than the quality factor change due to a reduction of the vacuum field at the emitter's position when the two cavities are brought in resonance. Both the weak and strong coupling regimes of two cavities have been observed experimentally and the SE decay rate has been modified by more than a factor of three with remote optical control.
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Submitted 18 November, 2012; v1 submitted 23 July, 2012;
originally announced July 2012.