A perforated microring resonator for optical sensing applications

Gabalis, Martynas; Urbonas, Darius; Petruškevičius, Raimondas

doi:10.1088/2040-8978/16/10/105003

Cited by 20 publications

(7 citation statements)

References 19 publications

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“…Very recently, a group of novel RRs called photonic crystal ring resonator (PCRR) have been proposed and experimentally demonstrated for RI sensing [25,576,[615][616][617][618][619][620]. The PCRR is a hybrid structure of PC and RR, which can be implemented through the introduction of a proper patterning, e.g., hole perforations (Figure 12, panel D, a) or partially etched rectangular perforations (Figure 12, panel D, b) into a standard RR.…”

Section: Whispering Gallery Mode (Wgm) Resonatormentioning

confidence: 99%

Optical Refractive Index Sensors with Plasmonic and Photonic Structures: Promising and Inconvenient Truth

Bai

Zhou

et al. 2019

Advanced Optical Materials

363

193

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Optical sensors are widely used for refractive index measurement in chemical, biomedical and food processing industries. Due to specific field distribution of the resonances excited, optical sensors provide high sensitivity to ambient refractive index variations. The sensitivity of optical sensor is highly dependent on material and structure of the sensor. Here, we review six major categories of optical refractive index sensors using plasmonic and photonic structures: (i) metal-based propagating plasmonic eigenwave structures, (ii) metal-based localized plasmonic eigenmode structures, (iii) dielectric-based propagating photonic eigenwave structures, (iv) dielectric-based localized photonic eigenmode structures, (v) advanced hybrid structures, and (vi) 2D material integrated structures. Representative configurations working in the wavelength range of 400−2000 nm will be selected and compared in terms of bulk refractive index sensitivities, figure of merits and working wavelengths. A technology map is established in order to define the standard and development trend for optical refractive index sensors.

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Section: Whispering Gallery Mode (Wgm) Resonatormentioning

confidence: 99%

Optical Refractive Index Sensors with Plasmonic and Photonic Structures: Promising and Inconvenient Truth

Bai

Zhou

et al. 2019

Advanced Optical Materials

363

193

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“…Optical ring resonators are interesting optical devices with a plethora of applications especially in optical switching [1][2][3][4], routing [4][5][6][7], and sensing [8][9][10]. An optical ring resonator usually consists of a straight waveguide coupled to a circular one, as shown in figure 1 In the first case the transmittance is given by the formula [11] 22 22 2 cos 1 2 cos n a r ar T r a ar…”

Section: Introduction and Theoretical Analysismentioning

confidence: 99%

A study on refractive index sensors based on optical micro-ring resonators

Tsigaridas

2017

Photonic Sens

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Abstract:In this work, the behavior of refractive index sensors based on optical micro-ring resonators is studied in detail. Using a result of waveguide perturbation theory in combination with numerical simulations, the optimum design parameters of the system, maximizing the sensitivity of the sensor, are determined. It is found that, when optimally designed, the sensor can detect relative refractive index changes of the order of n/n310 4 , assuming that the experimental setup can detect relative wavelength shifts of the order of /310 5. The behavior of the system as bio-sensor has also been examined. It is found that, when optimally designed, the system can detect refractive index changes of the order of n10 3 for a layer thickness of t=10 nm, and changes in the layer thickness of the order of t0.24 nm, for a refractive index change of n=0.05.

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“…Numerical simulations of perforated microring structures were conducted using finite-element method (FEM) 12) and finite-difference time-domain (FDTD) method. 23,24) The perforated microring resonators were fabricated on SOI platform at ePIXfab (imec, Leuven) using a standard CMOS process by deep ultraviolet (DUV) lithography and by electron beam lithography (EBL) at Melbourne Center for Nanofabrication as well as at the Nanofabrication Facility at Swinburne University of Technology in Australia.…”

Section: Methodsmentioning

confidence: 99%

“…In the case of microring resonators, several strategies have been proposed to overcome this limitation, including ultrathin SOI microring resonators, 9) slotted waveguide microring resonators, 10) introduction of subwavelength grating structures [11][12][13][14] and photonic crystals inside the microring cavity, [15][16][17][18][19] and a microring with periodically arranged metal nanodisks. 20,21) The possibility to fabricate microrings with different perforation depths and arrangements opens a new degree of freedom in device design.…”

Section: Introductionmentioning

confidence: 99%

Microring resonators with circular element inner-wall gratings for enhanced sensing

Petruškevičius

Balčytis

Urbonas

et al. 2020

Jpn. J. Appl. Phys.

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We suggest that implementation of a circular element second order Bragg grating 1D photonic crystals into the inner-wall of silicon-on-insulator microring resonators increases the light-matter interaction strength and device free spectral range. Introduction of a specifically tailored grating changes the quality factor of a selected resonance and modulates the losses of the system, leading to the presence of longitudinal resonant air and dielectric Bloch modes. This phenomenon can be harnessed for the development of a self-referenced sensor that is immune to changes in ambient temperature and is well suited for both biomolecule and hydrogen gas exposure sensing. The recent results on numerical modeling, lithographic fabrication, and characterization of microring resonators with circular elements on inner-wall are presented.

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A perforated microring resonator for optical sensing applications

Cited by 20 publications

References 19 publications

Optical Refractive Index Sensors with Plasmonic and Photonic Structures: Promising and Inconvenient Truth

Optical Refractive Index Sensors with Plasmonic and Photonic Structures: Promising and Inconvenient Truth

A study on refractive index sensors based on optical micro-ring resonators

Microring resonators with circular element inner-wall gratings for enhanced sensing

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