An environmental sensor based on an integrated optical whispering gallery mode disk resonator

Schweinsberg, Aaron; Hocdé, Sandrine; Lepeshkin, Nick N.; Boyd, Robert W.; Chase, Christopher; Fajardo, Julie E.

doi:10.1016/j.snb.2006.10.007

Cited by 77 publications

(41 citation statements)

References 11 publications

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“…20 Also, disk and ring resonators excited optically at the near infrared have been studied as sensors. 21,22 In fact, these types of sensors have been able to probe nanoparticles of a few tens of nanometers in size. 23 In the following, the possibility of using disk resonators excited with elastic waves, similar to the ones described in the previous paragraphs, is considered.…”

Section: Resultsmentioning

confidence: 99%

Whispering gallery modes for elastic waves in disk resonators

Kaproulias

Sigalas

2011

AIP Advances

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The resonant modes of elastic waves in disk resonators are computationally studied with the finite difference time domain method. Different materials examined for the disk such as platinum and silicon. The effect of a glass substrate is also important especially in the case of silicon disks because of the similarity of sound velocities and mass densities between the two materials. The possibility of using those structures as sensors is also considered

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Section: Resultsmentioning

confidence: 99%

Whispering gallery modes for elastic waves in disk resonators

Kaproulias

Sigalas

2011

AIP Advances

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“…WGM resonators can have different geometries such as cylinder [1,2,3], microsphere [4,5,6], microfiber coils and microdisk [7]. In these geometries, due to light recycling nature, light-matter interaction is greatly enhanced.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity optimization in whispering gallery mode optical cylindrical biosensors

Khozeymeh

Razaghi

2018

J. Phys.: Conf. Ser.

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Abstract. Whispering-gallery-mode resonances propagated in cylindrical resonators have two angular and radial orders of l and i. In this work, the higher radial order whispering-gallerymode resonances, (i = 1 − 4), at a fixed l are examined. The sensitivity of theses resonances is analysed as a function of the structural parameters of the cylindrical resonator like different radii and refractive index of composed material of the resonator. A practical application where cylindrical resonators are used for the measurement of glucose concentration in water is presented as a biosensor demonstrator. We calculate the wavelength shifts of the WG1-4, in several glucose/water solutions, with concentrations spanning from 0.0% to 9.0.% (weight/weight). Improved sensitivity can be achieved using multi-WGM cylindrical resonators with radius of R = 100 μm and resonator composed material of MgF 2 with refractive index of nc = 1.38. Also the effect of polarization on sensitivity is considered for all four WGMs. The best sensitivity of 83.07 nm/RIU for the fourth WGM with transverse magnetic polarization, is reported. These results propose optimized parameters aimed to fast designing of cylindrical resonators as optical biosensors, where both the sensitivity and the geometries can be optimized.

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“…Whispering-gallery-mode resonators (WGMR) are frequently used for refractometry and reactive biosensing due to their superb intrinsic sensitivity [1][2][3][4][5][6]. Although many different sensing schemes have been developed for different scenarios, the basic principle is always the same: the sensing target, whether gas, fluid, biomolecules, or nanoparticles, interacts with the evanescent electromagnetic field near the surface of the resonator.…”

Section: Introductionmentioning

confidence: 99%

Refractometry with Ultralow Detection Limit Using Anisotropic Whispering-Gallery-Mode Resonators

Weng¹,

Anstie²,

Luiten³

2015

Phys. Rev. Applied

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The intrinsic sensitivity of whispering-gallery-mode resonators aimed at measuring refractive index can be extremely high, although their practical performance is compromised by temperature fluctuations that masquerade as refractive-index changes. We present a triple-mode approach that delivers simultaneous and independent sensing of temperature and refractive-index changes in the same resonator. The frequency difference between two orthogonally polarized modes is used to sense temperature which is then actively stabilized to ∼1 μK over 15 minutes. We then detect a frequency difference between two modes of different wavelengths to obtain a refractive-index measurement that is free of temperature fluctuations. This triple-mode technique delivers a state-of-the-art detection limit of 8 × 10 −9 refractive-index units, despite the resonator size being 100 times larger than that typically used for sensitive refractometric sensing.

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An environmental sensor based on an integrated optical whispering gallery mode disk resonator

Cited by 77 publications

References 11 publications

Whispering gallery modes for elastic waves in disk resonators

Whispering gallery modes for elastic waves in disk resonators

Sensitivity optimization in whispering gallery mode optical cylindrical biosensors

Refractometry with Ultralow Detection Limit Using Anisotropic Whispering-Gallery-Mode Resonators

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