Ultimate quality factor of silica microtoroid resonant cavities

In high temperature and vacuum applications, when heat transfer is predominantly by radiation, the material’s surface texture is of substantial importance. Several micro- and nanostructure designs have been proposed to enhance a material’s emissivity and its radiative coherence, as control of thermal emission is of crucial concern in the design of infrared sources, optical filters, and sensing devices. In this research, an extraordinary coherent thermal emission from an anisotropic microstructure is experimentally and theoretically presented. The enhanced coherency is due to coherent coupling between resonant cavities obtained by surface standing waves, wherein each cavity supports a localized field that is attributed to coupled surface phonon polaritons. We show that it is possible to obtain a polarized quasimonochromatic thermal source from a SiC microstructure with a high quality factor of 600 at the resonant frequency of the cavity and a spatial coherence length of 716 wavelengths, which corresponds to an angular divergence of 1.4mrad. In the experimental results, we measured a quality factor of 200 and a spatial coherence length of 143 wavelengths. We attribute the deviation in the experimental results to imperfections in the fabrication of the high quality factor cavities.

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Quality Factor Dependence on Vertical Slab Structure in Photonic Crystal Double Heterostructure Resonant Cavities

Advances in Optical Sciences Congress ◽

10.1364/ipnra.2009.imf2 ◽

2009 ◽

Cited By ~ 1

Author(s):

Adam Mock ◽

John D. O'Brien

Keyword(s):

Photonic Crystal ◽

Quality Factor ◽

Resonant Cavities ◽

Double Heterostructure

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Exploring Refractive Index Ultra Compact Nano Sensor Using Photonic Crystal Resonant Cavities

Journal of Computational and Theoretical Nanoscience ◽

10.1166/jctn.2020.9271 ◽

2020 ◽

Vol 17 (7) ◽

pp. 2926-2931

Author(s):

Masoud Mohammadi ◽

Mahmood Seifouri ◽

Elham Boyerahmadi ◽

R. Udaiyakumar

Keyword(s):

Refractive Index ◽

Photonic Crystal ◽

Integrated Circuits ◽

Quality Factor ◽

Optical Sensors ◽

Figure Of Merit ◽

Limit Of Detection ◽

Transmission Efficiency ◽

Resonant Cavities ◽

The Mean

In this paper, an ultra-compact photonic crystal sensor based resonant cavities is proposed with improved quality factor, sensitivity and detection limit. The proposed sensor has 2D pillar photonic crystals with hexagonal array of dielectric rods. The refractive index of dielectric rods, radius of rods, filling factor (r/a) and lattice constant of the proposed structure are 3.46, 108 nm, 0.2 and 542 nm, respectively. The mean transmission efficiency, Quality factor, sensitivity, Figure of Merit (FOM) and limit of detection (LOD) are calculated as 92.2%, 9975.8, 371 nm/RIU, 2366 and 4.5 x 10-5 RIU, respectively. The corresponding electric field distributions and it band characteristics are studied using finite different time domain method (FDTD) and plan wave expansion (PWE). The cross-section of the proposed structure is 86 /xm2 and is desirable for photonic integrated circuits (PIC) and ultra-compact optical sensors.

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Quality factor assessment of subwavelength resonant cavities at FIR frequencies

Journal of Optics A Pure and Applied Optics ◽

10.1088/1464-4258/9/9/s12 ◽

2007 ◽

Vol 9 (9) ◽

pp. S355-S360 ◽

Cited By ~ 4

Author(s):

G Goussetis ◽

A P Feresidis ◽

R Cheung

Keyword(s):

Quality Factor ◽

Resonant Cavities

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Effective Modal Volume in Nanoscale Photonic and Plasmonic Near-Infrared Resonant Cavities

Applied Sciences ◽

10.3390/app8091464 ◽

2018 ◽

Vol 8 (9) ◽

pp. 1464

Author(s):

Xi Li ◽

Joseph Smalley ◽

Zhitong Li ◽

Qing Gu

Keyword(s):

Quality Factor ◽

Near Infrared ◽

Normalization Method ◽

Mode Analysis ◽

Infrared Light ◽

Light Sources ◽

Resonant Cavities ◽

Near Infrared Light ◽

Optical Cavities ◽

Computing Platforms

We survey expressions of the effective modal volume, Veff, commonly used in the literature for nanoscale photonic and plasmonic cavities. We apply different expressions of Veff to several canonical cavities designed for nanoscale near-infrared light sources, including metallo-dielectric and coaxial geometries. We develop a metric for quantifying the robustness of different Veff expressions to the different cavities and materials studied. We conclude that no single expression for Veff is universally applicable. Several expressions yield nearly identical results for cavities with well-confined photonic-type modes. For cavities with poor confinement and a low quality factor, however, expressions using the proper normalization method need to be implemented to adequately describe the diverging behavior of their effective modal volume. The results serve as a practical guideline for mode analysis of nanoscale optical cavities, which show promise for future sensing, communication, and computing platforms.

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Developing Uncertainty Quantification Strategies in Electromagnetic Problems Involving Highly Resonant Cavities

Journal of Verification Validation and Uncertainty Quantification ◽

10.1115/1.4051906 ◽

2021 ◽

Author(s):

Salvatore Campione ◽

JohnA Stephens ◽

Nevin Martin ◽

Aubrey Eckert ◽

Larry Warne ◽

...

Keyword(s):

Uncertainty Quantification ◽

Quality Factor ◽

Cylindrical Cavity ◽

High Quality Factor ◽

Shielding Effectiveness ◽

Computational Simulations ◽

High Quality ◽

Resonant Cavities ◽

Electromagnetic Problems

Abstract High-quality factor resonant cavities are challenging structures to model in electromagnetics owing to their large sensitivity to minute parameter changes. Therefore, uncertainty quantification strategies are pivotal to understanding key parameters affecting the cavity response. We discuss here some of these strategies focusing on shielding effectiveness properties of a canonical slotted cylindrical cavity that will be used to develop credibility evidence in support of predictions made using computational simulations for this application.

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Quality Factor of Elliptical Cylindrical Resonant Cavities

Journal of Microwave Power ◽

10.1080/16070658.1980.11689185 ◽

1980 ◽

Vol 15 (1) ◽

pp. 53-57 ◽

Cited By ~ 3

Author(s):

S.R. Rengarajan ◽

J.E. Lewis

Keyword(s):

Quality Factor ◽

Resonant Cavities

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Design of Photonic Crystal-Based Demultiplexer with High-Quality Factor for DWDM Applications

Journal of Optical Communications ◽

10.1515/joc-2017-0058 ◽

2019 ◽

Vol 40 (2) ◽

pp. 135-138 ◽

Cited By ~ 3

Author(s):

Mahdi Zavvari

Keyword(s):

Photonic Crystal ◽

Quality Factor ◽

Transmission Efficiency ◽

High Quality Factor ◽

Selection Task ◽

Wavelength Selection ◽

High Quality ◽

Channel Spacing ◽

Resonant Cavities

Abstract In this article, we proposed a four-channel optical demultiplexer based on photonic crystal resonant cavities. For performing wavelength selection task, we used four resonant cavities with different lengths in order to choose four channels with different wavelengths. The average channel spacing of the structure is about 1 nm and the minimum transmission efficiency is 90 %. The bandwidths of the channels are the same and equal to 0.8 nm.

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