Improving Indistinguishability of Single Photons from Colloidal Quantum Dots Using Nanocavities

Saxena, Abhi; Chen, Yueyang; Ryou, Albert; Sevilla, Carlos G.; Xu, Peipeng; Majumdar, Arka

doi:10.1021/acsphotonics.9b01481

Cited by 24 publications

(24 citation statements)

References 34 publications

(84 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These nanocapsules provide a more robust technique to incorporate DBT molecules into nanophotonic structures. Such devices can be used to achieve the high indistinguishably and single-mode collection necessary for using photons from DBT in many quantum information protocols [35,36].…”

Section: Resultsmentioning

confidence: 99%

Polymer-encapsulated organic nanocrystals for single photon emission

Schofield¹,

Bogusz²,

Hoggarth³

et al. 2020

Opt. Mater. Express

View full text Add to dashboard Cite

We demonstrate an emulsion-polymerisation technique to embed dibenzoterrylenedoped anthracene nanocrystals in polymethyl methacrylate (PMMA) nanocapsules. The nanocapsules require no further protection after fabrication and are resistant to sublimation compared to unprotected anthracene. The room temperature emission from single dibenzoterrylene molecules is stable and when cooled to cryogenic temperatures we see no change in their excellent optical properties compared to existing growth methods. We also show emission from nanocapsules embedded in a thin layer of titanium dioxide, highlighting their potential for integration into hybrid nanophotonic devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Polymer-encapsulated organic nanocrystals for single photon emission

Schofield¹,

Bogusz²,

Hoggarth³

et al. 2020

Opt. Mater. Express

View full text Add to dashboard Cite

show abstract

“…Several SPSs have been identified in the past decades such as quantum dots [28], transition metal dichalcogenides (TMDC) [29], hBN (hexagonal Boron Nitride) [30,31], Nitrogen vacancy in diamonds [32], spontaneous parametric down-conversion in nonlinear crystals etc [33]. Recently, it has been found that the coupling of single photons sources with cavity results in Purcell enhanced indistinguishability [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Deterministic coupling of a quantum emitter to surface plasmon polaritons, Purcell enhanced generation of indistinguishable single photons and quantum information processing

Sharma,

Tripathi

2021

Preprint

View full text Add to dashboard Cite

Integrated photonic circuits are an integral part of all-optical and on-chip quantum information processing and quantum computer. Deterministically integrated single-photon sources in nanoplasmonic circuits lead to densely packed scalable quantum logic circuits operating beyond the diffraction limit. Here, we report the coupling efficiency of single-photon sources to the plasmonic waveguide, characteristic transmission spectrum, propagation length, decay length, and plasmonic Purcell factor. We simulated the transmission spectrum to find the appropriate wavelength for various width of the dielectric in the metal-dielectric-metal waveguide. We find the maximum propagation length of 3.98 µm for Al 2 O 3 dielectric-width equal to 140 nm and coupling efficiency to be greater than 82 %. The plasmonic Purcell factor was found to be inversely proportional to dielectric-width (w), reaching as high as 31974 for w equal to 1 nm. We also calculated quantum properties of the photons like indistinguishability and found that it can be enhanced by plasmonic-nanocavity if single-photon sources are deterministically coupled. We further, propose a scalable metal-dielectric-metal waveguide based quantum logic circuits using the plasmonic circuit and Mach-Zehnder interferometer.

show abstract

“…[ 9 ] It is known that large Purcell enhancements are beneficial for improving the brightness and indistinguishability of single‐photon emitters. [ 18,21–25 ] However, in the above emitter–waveguide systems, [ 7–9 ] the Purcell enhancements were negligible because the optical mode volumes of the corresponding dielectric waveguide modes were much larger than λ 3 . [ 7–9 ]…”

Section: Introductionmentioning

confidence: 99%

Enlarging the Purcell Enhancement by Inserting a Dielectric Film in Dielectric‐Loaded Surface‐Plasmon‐Polariton Waveguides

et al. 2020

View full text Add to dashboard Cite

The deterministic integration of single‐photon emitters with large Purcell enhancements and waveguides is vital for integrated quantum circuits and quantum chips. Purcell enhancements are not only related to waveguide structures, but are also greatly affected by the position of single‐photon emitters in waveguides. Here, the insertion of a thin dielectric film with a controllable thickness between a dielectric strip and a metal surface to precisely position a single‐photon emitter in a dielectric‐load surface‐plasmon‐polariton (DLSPP) waveguide is proposed, and the Purcell enhancement is greatly enlarged. Simulations show that the vertical position of the single‐photon emitter above the metal surface is more important than its in‐plane position in the DLSPP waveguide for achieving enlarged Purcell enhancements. In the experiment, the vertical position of the single‐photon emitter in the modified DLSPP waveguide is controlled by evaporating a thin MgF2 film, and the in‐plane position is controlled by combining aligned electron beam lithography and photoluminescence imaging. The Purcell factor in the emitter‐waveguide system is measured to be Fp = 22.4, which is greater than those obtained using conventional DLSPP waveguides (Fp ≤ 6.0) in previous studies.

show abstract

Improving Indistinguishability of Single Photons from Colloidal Quantum Dots Using Nanocavities

Abstract: Colloidal quantum dots have garnered active research interest as quantum emitters due to their robust synthesis process and straightforward integration with nanophotonic platforms. However,

Cited by 24 publications

References 34 publications

Polymer-encapsulated organic nanocrystals for single photon emission

Polymer-encapsulated organic nanocrystals for single photon emission

Deterministic coupling of a quantum emitter to surface plasmon polaritons, Purcell enhanced generation of indistinguishable single photons and quantum information processing

Enlarging the Purcell Enhancement by Inserting a Dielectric Film in Dielectric‐Loaded Surface‐Plasmon‐Polariton Waveguides

Contact Info

Product

Resources

About