Quantum electrodynamics in a whispering-gallery microcavity coated with a polymer nanolayer

Abstract

Quasi-transverse-electric and -transverse-magnetic fundamental whispering gallery modes in a polymer-coated silica microtoroid are theoretically investigated and demonstrated to possess very high-quality factors. The existence of a nanometer-thickness layer not only evidently reduces the cavity mode volume but also draws the maximal electric field's position of the mode to the outside of the silica toroid, where single quantum dots or nanocrystals are located. Both effects result in a strongly enhanced coherent interaction between a single dipole (for example, a single defect center in a diamond crystal) and the quantized cavity mode. Since the coated microtoroid is highly feasible and robust in experiments, it may offer an excellent platform to study strong-coupling cavity quantum electrodynamics, quantum information, and quantum computation.

References in corpus (6)

• Quantum nature of a strongly-coupled single quantum dot-cavity system
• Linear and nonlinear optical spectroscopy of a strongly-coupled microdisk-quantum dot system
• Cavity QED with Diamond Nanocrystals and Silica Microspheres
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Cited by in corpus (2)

• Compact quantum gates on electron-spin qubits assisted by diamond nitrogen-vacancy centers inside cavities
• Coupling of ultrathin tapered fibers with high-Q microsphere resonators at cryogenic temperatures and observation of phase-shift transition from undercoupling to overcoupling