Fiber coupling to BaTiO3 glass microspheres in an aqueous environment

Oleksiy Svitelskiy; Yangcheng Li; Arash Darafsheh; Misha Sumetsky; David Carnegie; Edik Rafailov; Vasily N. Astratov

Fiber coupling to BaTiO3 glass microspheres in an aqueous environment

Oleksiy Svitelskiy, Yangcheng Li, Arash Darafsheh, Misha Sumetsky, David Carnegie, Edik Rafailov, Vasily N. Astratov

Research output: Contribution to journal › Article › peer-review

Abstract

Compact microspheres with high-quality (Q) whispering gallery modes are required for many applications involving liquid immersion, such as sensing nanoparticles and studying resonant radiative pressure effects. We show that high-index (1.9 and 2.1) barium titanate glass (BTG) microspheres are perfect candidates for these applications due to their high-Q (similar to 10(4) in the 1100-1600 nm range) resonances evanescently excited in spheres with diameters of 4-15 mu m. By reattaching the spheres at different positions along a tapered optical fiber, we show that the coupling constant exponentially increases with thinner fiber diameters. We demonstrate the close to critical coupling regime with intrinsic Q = 3 x 10(4) for water immersed 14 mu m BTG spheres. (C) 2011 Optical Society of America

Original language	English
Pages (from-to)	2862-2864
Number of pages	3
Journal	Optics Letters
Volume	36
Issue number	15
Publication status	Published - 1 Aug 2011

Keywords

MICROCAVITY
EXCITATION

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http://dx.doi.org/10.1364/OL.36.002862

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title = "Fiber coupling to BaTiO3 glass microspheres in an aqueous environment",

abstract = "Compact microspheres with high-quality (Q) whispering gallery modes are required for many applications involving liquid immersion, such as sensing nanoparticles and studying resonant radiative pressure effects. We show that high-index (1.9 and 2.1) barium titanate glass (BTG) microspheres are perfect candidates for these applications due to their high-Q (similar to 10(4) in the 1100-1600 nm range) resonances evanescently excited in spheres with diameters of 4-15 mu m. By reattaching the spheres at different positions along a tapered optical fiber, we show that the coupling constant exponentially increases with thinner fiber diameters. We demonstrate the close to critical coupling regime with intrinsic Q = 3 x 10(4) for water immersed 14 mu m BTG spheres. (C) 2011 Optical Society of America",

keywords = "MICROCAVITY, EXCITATION",

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T1 - Fiber coupling to BaTiO3 glass microspheres in an aqueous environment

AU - Svitelskiy, Oleksiy

AU - Li, Yangcheng

AU - Darafsheh, Arash

AU - Sumetsky, Misha

AU - Carnegie, David

AU - Rafailov, Edik

AU - Astratov, Vasily N.

PY - 2011/8/1

Y1 - 2011/8/1

N2 - Compact microspheres with high-quality (Q) whispering gallery modes are required for many applications involving liquid immersion, such as sensing nanoparticles and studying resonant radiative pressure effects. We show that high-index (1.9 and 2.1) barium titanate glass (BTG) microspheres are perfect candidates for these applications due to their high-Q (similar to 10(4) in the 1100-1600 nm range) resonances evanescently excited in spheres with diameters of 4-15 mu m. By reattaching the spheres at different positions along a tapered optical fiber, we show that the coupling constant exponentially increases with thinner fiber diameters. We demonstrate the close to critical coupling regime with intrinsic Q = 3 x 10(4) for water immersed 14 mu m BTG spheres. (C) 2011 Optical Society of America

AB - Compact microspheres with high-quality (Q) whispering gallery modes are required for many applications involving liquid immersion, such as sensing nanoparticles and studying resonant radiative pressure effects. We show that high-index (1.9 and 2.1) barium titanate glass (BTG) microspheres are perfect candidates for these applications due to their high-Q (similar to 10(4) in the 1100-1600 nm range) resonances evanescently excited in spheres with diameters of 4-15 mu m. By reattaching the spheres at different positions along a tapered optical fiber, we show that the coupling constant exponentially increases with thinner fiber diameters. We demonstrate the close to critical coupling regime with intrinsic Q = 3 x 10(4) for water immersed 14 mu m BTG spheres. (C) 2011 Optical Society of America

KW - MICROCAVITY

KW - EXCITATION

M3 - Article

SN - 0146-9592

VL - 36

SP - 2862

EP - 2864

JO - Optics Letters

JF - Optics Letters

IS - 15

ER -

Fiber coupling to BaTiO3 glass microspheres in an aqueous environment

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