A composite microcavity of diamond nanopillar and deformed silica microsphere with enhanced evanescent decay length

Barbour, R. James; Dinyari, Khodadad Nima; Wang, Hailin

doi:10.1364/oe.18.018968

Cited by 28 publications

(16 citation statements)

References 21 publications

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“…2). Detailed experimental studies have shown that evanescent decay length in regions 45 o away from a symmetry axis is of order 400 nm (with λ=800 nm), which is nearly 4 times of the evanescent decay length of conventional silica WGM resonators with no deformation [2]. For the deformed silica resonator, the WGMs can couple efficiently to NV centers within 200 nm of the diamond surface.…”

Section: Results and Discussion A) Enhancement Of Evanescent Decay Lmentioning

confidence: 99%

Cavity QED of NV Centers in Diamond Nanopillars

Wang¹

2012

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Section: Results and Discussion A) Enhancement Of Evanescent Decay Lmentioning

confidence: 99%

Cavity QED of NV Centers in Diamond Nanopillars

Wang¹

2012

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“…Furthermore, the free‐space coupling can avoid extra coupling loss, desirable for nonlinear processes and biochemical sensing experiments . Thirdly, the evanescent field can be enhanced in the deformed microcavities , and thus boost the light–matter interactions. Combining these advantages, there are many application benefits from this type of microcavities, including nanoparticle location detection , rotation‐speed sensing as well as optical energy storage .…”

Section: Applicationsmentioning

confidence: 99%

“…), including not only the smooth deformations of a circle or sphere and cavities with boundary defects, but also a vertical emission cavity with diffraction grating along the cavity circumference. Furthermore, several of the latest photonics applications of a WGM cavity with unidirectional emission are introduced, including wide‐band laser illumination source speckle‐free full‐field imaging , free‐space excitation , evanescent‐field enhancement , optical energy storage , and sensing .…”

Section: Introductionmentioning

confidence: 99%

Whispering‐gallery microcavities with unidirectional laser emission

Jiang

Zou

Wang

et al. 2015

Laser & Photonics Reviews

210

104

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Optical whispering‐gallery mode (WGM) microcavities featuring ultrahigh Q factors and small mode volumes enhance significantly the interaction between light and matter, becoming an excellent platform for achieving ultralow‐threshold microlasers. However, the emission of traditional WGMs is isotropic due to the rotational symmetry of cavity geometries, which hinders the potential photonics applications. In this review, the progress in WGM microcavities towards unidirectional laser emission is summarized. When a subwavelength scatterer is placed on the boundary of the microcavity, the unidirectional emission occurs due to the collimation effect of the microcavity‐enhanced scattering field. Furthermore, microcavities deformed from the circular shapes can not only produce the chaos‐assisted unidirectional emission, but also maintain high Q factors by special design and fabrication processes. Finally, gratings along the circumference of the WGM microdisk or microring can scatter the WGMs in the vertical direction. The review also lists several important applications of these types of microcavities, such as wide‐band laser illumination source, free‐space coupling, evanescent‐field enhancement, optical energy storage, and sensing.

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“…In particular, many theoretical and experimental works have been devoted to the hybrid system in which NV centers are coupled with whispering-gallery-mode (WGM) microresonators. By using microspheres [25,26] and diamond-GaP microdisks [27], strong coupling between the NV center and WGM resonator has been experimentally realized. Wei and Deng [28] presented an efficient protocol for constructing two-qubit and threequbit quantum logic gates, including the CNOT gate, Toffoli gate, and Fredkin gate, acting on NV centers confined in microcavities.…”

Section: Introductionmentioning

confidence: 99%

Universal hybrid three-qubit quantum gates assisted by a nitrogen-vacancy center coupled with a whispering-gallery-mode microresonator

Wang

2014

Phys. Rev. A

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We investigate the construction of two universal three-qubit quantum gates in a hybrid system. The designed system consists of a flying photon and a stationary negatively charged nitrogen-vacancy (NV) center fixed on the periphery of a whispering-gallery-mode (WGM) microresonator, with the WGM cavity coupled to tapered fibers functioning as an add-drop structure. These gate operations are accomplished by encoding the information both on the spin degree of freedom of the electron confined in the NV center and on the polarization and spatial-mode states of the flying photon, respectively. Compared with previous schemes, our proposed scheme leads to a reduction of time and resource consumption in the processing. Moreover, these gates work in a deterministic way with no extra qubits required, which is feasible with current technologies. Both proposed gate operations could be physically implemented in one step, which provides a promising approach for quantum information processing ranging from distributed quantum computation to long-distance quantum communication.

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A composite microcavity of diamond nanopillar and deformed silica microsphere with enhanced evanescent decay length

Cited by 28 publications

References 21 publications

Cavity QED of NV Centers in Diamond Nanopillars

Cavity QED of NV Centers in Diamond Nanopillars

Whispering‐gallery microcavities with unidirectional laser emission

Universal hybrid three-qubit quantum gates assisted by a nitrogen-vacancy center coupled with a whispering-gallery-mode microresonator

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