Coupling Single Atoms to a Nanophotonic Whispering-Gallery-Mode Resonator via Optical Guiding

Zhou, Xinchao; Tamura, Hikaru; Chang, Tzu-Han; Hung, Chen-Lung

doi:10.1103/physrevlett.130.103601

Cited by 17 publications

(6 citation statements)

References 68 publications

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“…Inside the guiding potential, we measure an atomic flux of ∼ 400 atoms/s nearly ∼ 100 nm above the microring. 4 To further cool the guided atoms into a surface microtrap with a strong repulsive barrier, we perform degenerate Raman-sideband cooling (dRSC) as reported in Ref. 5 In carrying out the dRSC, one needs a spin-motion coupling to convert the kinetic energy (or the trap vibrational energy) into the Zeeman energy by coupling different trap states of adjacent magnetic levels.…”

Section: Experimental Setup and Ensemble Atom Trappingmentioning

confidence: 99%

Realization of ensemble atom trapping and collective atom-photon coupling on a nanophotonic microring circuit

Zhou,

Tamura,

Chang

et al. 2024

Quantum Sensing, Imaging, and Precision Metrology II

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We discuss our recent experiment demonstrating superradiantly-coupled trapped atomic ensemble in an optical microtrap above a nanophotonic microring resonator. Here, efficient trap loading is achieved via a degenerate Raman-sideband cooling (dRSC) scheme using built-in spin-motion coupling in the microtrap and a single optical pumping beam sent from freespace. We show that these dRSC-cooled atoms display large cooperative coupling and enhanced superradiant decay into a whispering-gallery mode in the microring resonator.

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Section: Experimental Setup and Ensemble Atom Trappingmentioning

confidence: 99%

Realization of ensemble atom trapping and collective atom-photon coupling on a nanophotonic microring circuit

Zhou,

Tamura,

Chang

et al. 2024

Quantum Sensing, Imaging, and Precision Metrology II

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“…One of the most paradigmatic examples of modifying individual and collective spontaneous emission of quantum emitters are photonic crystals (PhC) [5][6][7], which are now routinely interfaced with many different types of emitters [8][9][10][11][12][13][14][15][16][17]. In these systems, the propagation of light becomes modulated by the periodic variation of the refractive index, resulting in nontrivial band structures, e.g., featuring photonic bandgaps [18], Dirac-like energy dispersions [19] or saddlepoints [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Photon-Mediated Interactions near a Dirac Photonic Crystal Slab

2021

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Dirac energy dispersions are responsible for the extraordinary transport properties of graphene. This motivated the quest for engineering such energy dispersions also in photonics, where they have been predicted to lead to many exciting phenomena. One paradigmatic example is the possibility of obtaining power-law, decoherence-free, photon-mediated interactions between quantum emitters when they interact with such photonic baths. This prediction, however, has been obtained either by using toy-model baths, which neglect polarization effects, or by restricting the emitter position to high-symmetry points of the unit cell in the case of realistic structures. Here, we develop a semianalytical theory of dipole radiation near photonic Dirac points in realistic structures that allows us to compute the effective photonmediated interactions along the whole unit cell. Using this theory, we are able to find the positions that maximize the emitter interactions and their range, finding a trade-off between them. Besides, using the polarization degree of freedom, we also find positions where the nature of the collective interactions changes from being coherent to dissipative ones. Thus, our results significantly improve the knowledge of Dirac light−matter interfaces and can serve as a guidance for future experimental designs.

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“…These methods exhibit a highly precise control of atomic motion near photonic structures, including photonic crystal waveguides [22][23][24][25] and microring resonators. [26,27,37] Additionally, these demonstrations are compatible with on-chip integrated devices for cooling, transport, and trapping of cold atoms. [39][40][41] In this Letter, we report on transporting free space cooled 87 Rb atoms towards a GaN-on-sapphire chip [38] with an optical conveyor belt.…”

mentioning

confidence: 97%

“…Many ground-breaking experimental results in coupling atoms to photonic structures have been achieved in various nanophotonic platforms. [7,[22][23][24][25][26][27][28][29][30][31][32] However, these studies move forward with some potential disadvantages. For instance, the platforms based on nanofibers [7,[30][31][32] are suspended in vacuum, thus being potentially unstable and having poor thermal conductivity, which imposes limitations on the atom trap lifetime and atom coherence time.…”

mentioning

confidence: 99%

“…In order to achieve deterministic atom trapping on integrated photonic devices, important theoretical and experimental milestones have been reached with unsuspended waveguides and microring structures. [22][23][24][25][26][27]37,38] Atoms are loaded into evanescent field of photonic structures from free space with optical tweezers and optical conveyor belts. These methods exhibit a highly precise control of atomic motion near photonic structures, including photonic crystal waveguides [22][23][24][25] and microring resonators.…”

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confidence: 99%

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Transporting Cold Atoms towards a GaN-on-Sapphire Chip via an Optical Conveyor Belt

Wang

Chen

et al. 2023

Chinese Phys. Lett.

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Trapped atoms on photonic structures inspire many novel quantum devices for quantum information processing and quantum sensing. Here, we have demonstrated a hybrid photonic-atom chip platform based on a GaN-on-sapphire chip and the transport of an ensemble of atoms from free space towards the chip with an optical conveyor belts. Due to our platform’s complete optical accessibility and careful control of atomic motion near the chip with a conveyor belt, successful atomic transport towards the chip is made possible. The maximum transport efficiency of atoms is about 50% with a transport distance of 500 µm. Our results open up a new route toward the efficient loading of cold atoms into the evanescent-field trap formed by the photonic integrated circuits, which promises strong and controllable interactions between single atoms and single photons.

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Coupling Single Atoms to a Nanophotonic Whispering-Gallery-Mode Resonator via Optical Guiding

Cited by 17 publications

References 68 publications

Realization of ensemble atom trapping and collective atom-photon coupling on a nanophotonic microring circuit

Realization of ensemble atom trapping and collective atom-photon coupling on a nanophotonic microring circuit

Photon-Mediated Interactions near a Dirac Photonic Crystal Slab

Transporting Cold Atoms towards a GaN-on-Sapphire Chip via an Optical Conveyor Belt

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