Origin of Antibunching in Resonance Fluorescence

Hanschke, Lukas; Schweickert, Lucas; Carreño, Juan Camilo López; Schöll, Eva; Zeuner, Katharina D.; Lettner, Thomas; Casalengua, Eduardo Zubizarreta; Reindl, Marcus; Silva, Saimon Filipe Covre da; Trotta, Rinaldo; Finley, Jonathan J.; Rastelli, Armando; Valle, Elena del; Laussy, Fabrice P.; Zwiller, Val; Müller, Kai; Jöns, Klaus D.

doi:10.1103/physrevlett.125.170402

Cited by 25 publications

(23 citation statements)

References 42 publications

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“…Theoretical Model. Experiments based on the resonance fluorescence of the two-level system demonstrate that the single-photon character and subnatural linewidth cannot simultaneously be observed in simple resonant excitation [24,25]. As mentioned above, the main purpose of this work is to explore the SPS scheme beyond the limitation of the intrinsic natural linewidth of emitter.…”

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confidence: 99%

“…The transition from the ground state |g to the excited state |e is driven by a laser field and the transition between the two ground states |g and |a is driven by another coherent field. The fluorescence is collected by a detection setup before which a filter with a finite bandwidth is inserted [24,25]. We find that almost all the spectral components of fluorescence emitted from the transition |e → |a can be focused on a bandwidth which is much smaller the natural linewidth of emitter and can be manipulated easily by the coherent fields applied.…”

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confidence: 99%

“…In current SPS schemes, spectral filtering is often applied to eliminate unwanted spectral components to improve the indistinguishability of the quantum sources [13,[21][22][23]. However, as verified by recent works [24,25], spectral filtering may lead to the destruction of single-photon character, which means that the SPS degenerates to an ordinary source. Therefore, in simple fluorescence, the simultaneous observation of subnatural linewidth and single-photon character is considered impossible.…”

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confidence: 99%

“…And, according to Ref. [24,25], only when the detector (or filter) bandwidth is much larger than the linewidth of fluorescent photon so that the dominant fluorescent components are included, can single-photon character be maintained when detected. Therefore, to test whether the SPS with a linewidth much smaller than the natural linewidth of emitter is obtained successfully, we consider the response of single photon on the detector with a certain bandwidth, which can be described by the zero delay two-photon correlation [38] g (2) s (0…”

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confidence: 99%

“…And as mentioned in Refs. [24,25], the corresponding detection of two-photon correlation of the fluorescence can be implemented in experiments by inserting a spectral filter with a certain bandwidth in the detection path.…”

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confidence: 99%

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Single-photon source with ultranarrow linewidth manipulated by coherent fields

Zhang¹,

Li²

2021

Preprint

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Recent works [PhysRevLett.125.170402 (2020) and PhysRevLett.125.043603 (2020)] verify that the perfect single-photon character is a global property of resonance fluorescence including all the spectral components, and then the absence of some components can spoil the single-photon character, which considerably limits the application of filtering scheme to obtain single-photon source (SPS) with subnatural linewidth. Here, we note that the linewidth of fluorescent photon is not always limited by the intrinsic linewidth of the emitter, and provide a scheme where the linewidth of the fluorescent single photon can be much smaller than the natural linewidth of emitter by manipulating external coherent fields. By simulating the response of the filter or detection setup with a bandwidth approaching and even much smaller than the natural linewidth of emitter, the realization of ultranarrow SPS can be confirmed. Besides, we demonstrate that this scheme of ultranarrow SPS can be implemented based on various real physical platforms.

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Single-photon source with ultranarrow linewidth manipulated by coherent fields

Zhang¹,

Li²

2021

Preprint

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Ultra-low loss quantum photonic circuits integrated with single quantum emitters

et al. 2022

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The scaling of many photonic quantum information processing systems is ultimately limited by the flux of quantum light throughout an integrated photonic circuit. Source brightness and waveguide loss set basic limits on the on-chip photon flux. While substantial progress has been made, separately, towards ultra-low loss chip-scale photonic circuits and high brightness single-photon sources, integration of these technologies has remained elusive. Here, we report the integration of a quantum emitter single-photon source with a wafer-scale, ultra-low loss silicon nitride photonic circuit. We demonstrate triggered and pure single-photon emission into a Si3N4 photonic circuit with ≈ 1 dB/m propagation loss at a wavelength of ≈ 930 nm. We also observe resonance fluorescence in the strong drive regime, showing promise towards coherent control of quantum emitters. These results are a step forward towards scaled chip-integrated photonic quantum information systems in which storing, time-demultiplexing or buffering of deterministically generated single-photons is critical.

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Coherent light scattering from a telecom C-band quantum dot

Wells,

Müller,

Stevenson

et al. 2023

Nat Commun

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Quantum networks have the potential to transform secure communication via quantum key distribution and enable novel concepts in distributed quantum computing and sensing. Coherent quantum light generation at telecom wavelengths is fundamental for fibre-based network implementations, but Fourier-limited emission and subnatural linewidth photons have so far only been reported from systems operating in the visible to near-infrared wavelength range. Here, we use InAs/InP quantum dots to demonstrate photons with coherence times much longer than the Fourier limit at telecom wavelength via elastic scattering of excitation laser photons. Further, we show that even the inelastically scattered photons have coherence times within the error bars of the Fourier limit. Finally, we make direct use of the minimal attenuation in fibre for these photons by measuring two-photon interference after 25 km of fibre, demonstrating finite interference visibility for photons emitted about 100,000 excitation cycles apart.

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Origin of Antibunching in Resonance Fluorescence

Cited by 25 publications

References 42 publications

Single-photon source with ultranarrow linewidth manipulated by coherent fields

Single-photon source with ultranarrow linewidth manipulated by coherent fields

Ultra-low loss quantum photonic circuits integrated with single quantum emitters

Coherent light scattering from a telecom C-band quantum dot

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