Whispering gallery modes for elastic waves in disk resonators

Kaproulias, S.; Sigalas, M. M.

doi:10.1063/1.3675802

Cited by 9 publications

(3 citation statements)

References 20 publications

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“…Recent studies report the potentiality of these modes in the field of PC. Li et al [30] immersed an isolated tube in liquid medium and showed that WGMs can exhibit a narrow periodic transmission dip with a high quality factor, while Kaproulias and Sigalas [31] considered the disk geometry for sensing application. The main recent interest in WGMs is related to the excitation of acoustic modes in optical WGM resonators via backward stimulated Brillouin scattering (SBS) [32,33].…”

Section: Introductionmentioning

confidence: 99%

Tunable waveguide and cavity in a phononic crystal plate by controlling whispering-gallery modes in hollow pillars

et al. 2016

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We investigate the properties of a phononic crystal plate with hollow pillars and introduce the existence of whispering-gallery modes (WGMs). We show that by tuning the inner radius of the hollow pillar, these modes can merge inside both Bragg and low frequency band gaps, deserving phononic crystal and acoustic metamaterial applications. These modes can be used as narrow pass bands for which the quality factor can be greatly enhanced by the introduction of an additional cylinder between the hollow cylinder and the plate. We discuss some functionalities of these confined WGM in both Bragg and low frequency gaps for wavelength division in multiplexer devices using heteroradii pillars introduced into waveguide and cavity structures.

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Section: Introductionmentioning

confidence: 99%

Tunable waveguide and cavity in a phononic crystal plate by controlling whispering-gallery modes in hollow pillars

et al. 2016

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“…WGM resonators have been presented in shapes such as discs [11], toroids [12], and spheres [13,14]. This paper deals with a new design that was originally made to perform as a strain gauge.…”

Section: Methodsmentioning

confidence: 99%

Deployment and Comparison of a Low-Cost High-Sensitivity Concentration Meters Using Micro-Optical Resonators

Ali

Wael

Assal

2020

The 1st International Electronic Conference on Biosensors

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Micro-optical resonators have been introduced as sensors in many applications for a wide number of variable types of stimuli due to their very high resolution, high sensitivity, and high-quality factor. In this paper, a novel micro-optical sensor was designed and tested as a concentration meter for chemical composition of a solution. The micro-optical resonator used is based on whispering gallery mode (WGM). This phenomenon appears when a tapered, single-mode laser carrying micro-optical fiber is evanescently coupled with a polymeric or silica micro-optical resonator. The presented sensor shows the change in concentration by experiencing a change in its morphology due to the varied viscosity of its environment. The variation of concentrations or fluid contents results in a change between the radii of the micro-optical resonator. With varied chemical composition and concentration in the tested sample varied infinitesimally small morphological changes are detected. The change in the resonators shape is read as a WGM shift in the resonance transmission spectrum, which is interpreted using a technique called cross-correlation, which compares the output across time to display the shift, which is later translated into distinct concentration levels. The proposed, exceptionally low-cost sensors were able to detect change at very high resolutions allowing better sensitivity along with wider range of variation. Experimental work for detection of ranges of concentrations of variable type of contaminants is presented.

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“…The work on the hollow pillars in the field of acoustics dates back to the 1910s [22]. Taking into account the fact that hollow pillars can play a very significant role in optical or acoustic high Q resonators [23,24], recent studies report the potentiality of the hollow pillars in the field of photonic and phononic crystals [25][26][27][28]. Jin et al [29] theoretically demonstrate a homogeneous silicon plate with a square array of hollow pillars deposited on one side and discuss some features of the hollow pillars in both Bragg and low frequency gaps for wavelength division in multiplexer devices.…”

Section: Introductionmentioning

confidence: 99%

Imaging localized phononic cavity modes with laser interferometer

Wang¹,

Yu²,

Liu³

et al. 2018

J. Phys. D: Appl. Phys.

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In this work, we experimentally confirmed an effective Lamb-wave guiding method, which utilizes a localized phononic cavity mode in a 2D phononic crystal. The phononic crystal is created by a periodic distribution of solid pillars built on an elastic plate, while the cavity mode is induced by replacing part of the pillars by the hollow pillars. In the experiments, transmission characteristics of the Lamb-waves within the waveguides are studied comprehensively. Elastic field distributions of the cavity mode are mapped in the deep-subwavelength regime. In geometrical shapes, both a straight waveguide and a bended one are made for practical measurement, demonstrating visually that the elastic energies are well localized around the hollow pillars and can be transported around the bends.

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Whispering gallery modes for elastic waves in disk resonators

Cited by 9 publications

References 20 publications

Tunable waveguide and cavity in a phononic crystal plate by controlling whispering-gallery modes in hollow pillars

Tunable waveguide and cavity in a phononic crystal plate by controlling whispering-gallery modes in hollow pillars

Deployment and Comparison of a Low-Cost High-Sensitivity Concentration Meters Using Micro-Optical Resonators

Imaging localized phononic cavity modes with laser interferometer

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