Turning a molecule into a coherent two-level quantum system

Wang, Daqing; Kelkar, Hrishikesh; Martín-Cano, Diego; Rattenbacher, Dominik; Shkarin, Alexey; Utikal, Tobias; Götzinger, Stephan; Sandoghdar, Vahid

doi:10.1038/s41567-019-0436-5

Cited by 167 publications

(166 citation statements)

References 46 publications

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“…Wang et al. introduced a feedback mechanism based on the Hänsch–Couillaud technique using a “locking laser,” which reduced the RMS vibration amplitude from 2 to 0.1 nm, enabling the achievement of a very high Q ‐factor of 230 000 …”

Section: The Basic Theory Design and Construction Of Open‐access MImentioning

confidence: 99%

“…Solid‐state single‐photon emitters, including QDs, vacancy color centers, single molecules, provide atomic‐like two‐level systems by the nanoscale confinement of charge carriers that enable significant applications for on‐chip quantum information processing . The investigation of cavity quantum electrodynamics (CQED) by integrating single‐photon emitters in microcavities allows tailoring the light–matter interaction, leading to enhanced spontaneous emission rate via the Purcell effect, higher photon collection efficiency, better photon purity and indistinguishability, as well as photon–spin interfaces .…”

Section: Single‐photon Emitters and Nanoparticles In Open‐access Micrmentioning

confidence: 99%

“…further improved the cavity quality by using a DBR‐coated concave mirror fabricated on a fiber facet while introducing active cavity stabilization (already discussed in Section 2.3.5), leading to a very high Q factor of 230 000. Such a sophisticated system allows to turn the single DBT molecule into a coherent two‐level quantum system . By continuously varying cavity–molecule frequency detuning, the authors observed the evolution of spectra showing two split polaritonic resonances ( Figure a), evidencing the strong coupling regime of a single molecule with the optical microcavity by the anticrossing feature of photon energy (Figure b).…”

Section: Single‐photon Emitters and Nanoparticles In Open‐access Micrmentioning

confidence: 99%

Section: Single‐photon Emitters and Nanoparticles In Open‐access Micrmentioning

confidence: 99%

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Tunable Open‐Access Microcavities for Solid‐State Quantum Photonics and Polaritonics

Cai

et al. 2019

Adv Quantum Tech

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Optical microcavities are powerful platforms widely applied in quantum information and integrated photonic circuits, among which the open‐access microcavity is a newly emerging cavity structure consisting of a micro‐sized concave mirror and a planar mirror controlled individually by groups of nanopositioners, whilst light emitters can be grown or transferred at the antinode of the cavity optical modes. Compared with monolithic microcavities, the open‐access microcavity enables the simultaneous realization of small mode volume, large‐range tunability, flexible structural engineering, and easiness for integration with external emitters, exhibiting extensive applications in the fields of solid‐state quantum photonics and polaritonics over the last decade. This review first introduces the basic theory and the construction methods of open‐access microcavities, followed by the recent advances of their applications in exciton‐polaritons, photon condensates, quantum light sources, and nanoparticle sensing.

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Section: The Basic Theory Design and Construction Of Open‐access MImentioning

confidence: 99%

Section: Single‐photon Emitters and Nanoparticles In Open‐access Micrmentioning

confidence: 99%

Section: Single‐photon Emitters and Nanoparticles In Open‐access Micrmentioning

confidence: 99%

Section: Single‐photon Emitters and Nanoparticles In Open‐access Micrmentioning

confidence: 99%

See 2 more Smart Citations

Tunable Open‐Access Microcavities for Solid‐State Quantum Photonics and Polaritonics

Cai

et al. 2019

Adv Quantum Tech

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“…Very recently, we demonstrated near-unity coupling of single photons to the ZPL of an organic dye molecule placed in a high-finesse scannable Fabry-Perot microcavity [14]. Although the open structure of such a cavity ensures a high degree of control on the cavity resonance frequency and facilitates optimization of the molecule position, its design is not easily scalable to multiple emitters.…”

Section: Introductionmentioning

confidence: 99%

Coherent coupling of single molecules to on-chip ring resonators

et al. 2019

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We report on cryogenic coupling of organic molecules to ring microresonators obtained by looping subwavelength waveguides (nanoguides). We discuss fabrication and characterization of the chipbased nanophotonic elements which yield a resonator finesse in the order of 20 when covered by molecular crystals. Our observed extinction dips from single molecules reach 22%, consistent with an expected enhancement factor of up to 11 for the molecular emission into the nanoguide. Future efforts will aim at efficient coupling of a handful of molecules via their interaction with a ring microresonator mode, setting the ground for the realization of quantum optical cooperative effects. Coupling to nanoguide ring-resonatorsIt is known that the density of modes for the electromagnetic field is modified in the presence of boundaries, e.g. the mirrors of a Fabry-Perot cavity. This modification in turn affects the radiation properties of an emitter

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Quantum Plasmonics: Energy Transport Through Plasmonic Gap

2021

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scanning tunneling microscopy (STM), [5,6] atomic force microscopy (AFM), [7] and other techniques allowing resolution to be reduced to the atomic scale can help realize atomic-scale world exploration. This is the starting point of the nanotechnology era; since its inception, this technology has changed the nature of almost every human-made object. Six decades after Richard Feynman's lecture, we find that there is still plenty of room at the bottom, through the incorporation of nanophotonics. [8] To elucidate: quantum plasmonics has emerged as an attractive research field in new nanophotonics; research is underway to reveal and accurately describe the quantum nature of electrons at the bottom of extremely confined nano-or sub-nanometer scale materials, using light. [9,10] By exploring the quantum mechanical interactions of matter with light (in particular, using the coherent interactions between the plasmonic cavity and the material), [11][12][13][14][15][16][17][18] these efforts seek to establish new frontiers in information processing technology and to satisfy the everincreasing requirements for speed and capacity in quantum computing, quantum cryptography, and quantum metrology. They might also suggest research fields beyond this, involving the ultimate miniaturization of photonic components and the extreme limits of the light-matter interaction. These advantages may help solve some fundamental problems of electronics, such as those of bandwidth, frequency, and energy consumption. [19] In this review, we describe recent developments in the research of exotic materials capable of mediating quantum plasmonics and inducing quantum energy transport. We briefly provide classical and quantum descriptions of matter, from the bulk, nano, and cluster scales down to atomic matter, exploring the band structures via their optical responses. By considering a single nanoplasmonic material, we describe the theoretical and experimental findings pertaining to assembled nanoplasmonic structures, in the context of the plasmonic gap distance and the type of advanced functional material. The plasmonic gap herein refers to a nanometer or sub-nanometer gap that transports (couples, tunnels, exchanges, confines) electromagnetic energy between plasmonic resonators. Advanced functional materials within an extremely confined metallic resonator are described; these include air/vacuum, aliphatic and conjugated molecules, 2D materials, organic and inorganic materials with At the interfaces of metal and dielectric materials, strong light-matter interactions excite surface plasmons; this allows electromagnetic field confinement and enhancement on the sub-wavelength scale. Such phenomena have attracted considerable interest in the field of exotic material-based nanophotonic research, with potential applications including nonlinear spectroscopies, information processing, single-molecule sensing, organic-molecule devices, and plasmon chemistry. These innovative plasmonics-based technologies can meet the ever-increasing demands for speed and ca...

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Turning a molecule into a coherent two-level quantum system

Cited by 167 publications

References 46 publications

Tunable Open‐Access Microcavities for Solid‐State Quantum Photonics and Polaritonics

Tunable Open‐Access Microcavities for Solid‐State Quantum Photonics and Polaritonics

Coherent coupling of single molecules to on-chip ring resonators

Quantum Plasmonics: Energy Transport Through Plasmonic Gap

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