Optics of microdroplets

Datsyuk, V. V.; Izmaǐlov, I. A.

doi:10.1070/pu2001v044n10abeh001018

Cited by 29 publications

(11 citation statements)

References 197 publications

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“…We can thus neglect the effect of the voids on the WGM resonances if the voids locate far away from the microsphere's surface. The exact layer width of the WGM energy localization in the radial direction is given by [19,21] …”

Section: Resultsmentioning

confidence: 99%

Inner structure of ZnO microspheres fabricated via laser ablation in superfluid helium

Minowa¹,

Oguni²,

Ashida³

2017

Opt. Express

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ZnO microspheres fabricated via laser ablation in superfluid helium were found to have bubble-like voids. Even a microsphere demonstrating clear whispering gallery mode resonances in the luminescence had voids. Our analysis confirmed that the voids are located away from the surface and have negligible or little effect on the whispering gallery mode resonances since the electromagnetic energy localizes near the surface of these microspheres. The existence of the voids indicates that helium gas or any evaporated target material was present within the molten microparticles during the microsphere formation.

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Section: Resultsmentioning

confidence: 99%

Inner structure of ZnO microspheres fabricated via laser ablation in superfluid helium

Minowa¹,

Oguni²,

Ashida³

2017

Opt. Express

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“…Fundamental radiative loss is the only unavoidable, and usually negligible, loss mechanism in the cavity. It is shown theoretically that for a water droplet having a radius of 50 μm localized in air the radiation-limited quality factor is 10 73 at wavelength 0.6 μm [22,23]. The best practically achieved number for a quality factor for a conventional WGM resonator exceeds Q = 10 11 [27], limited by the absorption of the material.…”

Section: Introductionmentioning

confidence: 98%

Microcavity morphology optimization

et al. 2014

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High spectral mode density of conventional optical cavities is detrimental to the generation of broad optical frequency combs and to other linear and nonlinear applications. In this work we optimize the morphology of high-Q whispering gallery (WG) and Fabry-Perot (FP) cavities and find a set of parameters that allows treating them, essentially, as single-mode structures, thus removing limitations associated with a high density of cavity mode spectra. We show that both single-mode WGs and single-mode FP cavities have similar physical properties, in spite of their different loss mechanisms. The morphology optimization does not lead to a reduction of quality factors of modes belonging to the basic family. We study the parameter space numerically and find the region where the highest possible Q factor of the cavity modes can be realized while just having a single bound state in the cavity. The value of the Q factor is comparable with that achieved in conventional cavities. The proposed cavity structures will be beneficial for generation of octave spanning coherent frequency combs and will prevent undesirable effects of parametric instability in laser gravitational wave detectors.

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“…The value of the loss is usually much smaller than the other types of attenuation. A calculation of the radiative Q-factor for a m 100 m water droplet results in 10 73 at l = 600 nm [128]. As a rule, the radiation loss can be safely neglected in any resonator with the circumference exceeding a couple dozens of wavelength and a high enough refractive index contrast with the environment.…”

Section: Mode Structure and Dispersion Equationmentioning

confidence: 99%

Nonlinear and Quantum Optics with Whispering Gallery Resonators

Strekalov

2015

Cleo: 2015

114

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Optical whispering gallery modes (WGMs) derive their name from a famous acoustic phenomenon of guiding a wave by a curved boundary observed nearly a century ago. This phenomenon has a rather general nature, equally applicable to sound and all other waves. It enables resonators of unique properties attractive both in science and engineering. Very high quality factors of optical WGM resonators persisting in a wide wavelength range spanning from radio frequencies to ultraviolet light, their small mode volume, and tunable in-and out-coupling make them exceptionally efficient for nonlinear optical applications. Nonlinear optics facilitates interaction of photons with each other and with other physical systems, and is of prime importance in quantum optics. In this paper we review numerous applications of WGM resonators in nonlinear and quantum optics. We outline the current areas of interest, summarize progress, highlight difficulties, and discuss possible future development trends in these areas.

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Optics of microdroplets

Cited by 29 publications

References 197 publications

Inner structure of ZnO microspheres fabricated via laser ablation in superfluid helium

Inner structure of ZnO microspheres fabricated via laser ablation in superfluid helium

Microcavity morphology optimization

Nonlinear and Quantum Optics with Whispering Gallery Resonators

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