Mode volume calculation of whispering gallery modes. You can use these examples as a starting point for your own simulation work by downloading the tutorial model or demo app file and its accompanying instructions. For this purpose, the finite element method with comsol multiphysics software was employed. The whispering gallery wg mode method to measure complex permittivity is applied to the highly anisotropic material rutile. Pdf finite element simulation of a perturbed axial. Effects of nanocylinders on the whispering gallery modes in a. Thermal noise in whispering gallery mode resonators. Tunable whispering gallery mode device based on sidehole mof with. Tapered airholes at each branch of nbs have been employed as a part of mirror accompanied by curvedwalls at cross junctions to form a small curved nanocavity. Poman so, departmental member department of electrical and computer engineering. Exhouse 2d finiteelement simulation of the whisperinggallery.
Microresonator, microcavity, whispering gallery, wgm, simulation. Whisperinggallery mode lasing in a floating gan microdisk. Jan 14, 2020 controlling the lasing mode, emission direction, threshold, and quality factor of whispering gallery mode lasing is important for practical applications such as optical interconnections, onchip. Though elliptical 6 or even nonplanar crinkled 7 or spooled 8 wg morphologies exhibit advantageous features with respect to certain applications, this paper considers only closed, planar wg. Tunable whispering gallery mode photonic device based on. Comsol multiphysics software with wave optics module is used for modelling. Adding and customizing expressions in the physics interfaces allows for freely coupling them with each. Comsol is the developer of comsol multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems. Feb 08, 2007 how to simulate the whisperinggallery modes of dielectric microresonators in femlabcomsol how to simulate the whisperinggallery modes of dielectric microresonators in femlabcomsol oxborrow, mark 20070208 00. Warning your internet explorer is in compatibility mode and may not be displaying the website correctly. In addition to the operating system requirements listed below, see the interfacing product suite requirements for specific requirements for the cad import module, design module, and the livelink products. The site is made by ola and markus in sweden, with a lot of help from our friends and colleagues in italy, finland, usa, colombia, philippines, france and contributors from all over the world. By virtue of continuouswave exciting mose2microsphere whispering gallery mode wgm cavities, we realize multiple excitonic wgm lasing in the emission wavelength range of. Millimeterwave wgm resonatorbased characterization of.
A whisperinggallerymodebased seismometer provides for receiving laser light into an optical fiber, operatively coupling the laser light from the optical fiber into a whisperinggallerymodebased optical resonator, operatively coupling a spring of a springmass assembly to a housing structure. The current work describes a theory and the results of the modelling of the propagation of light in whispering gallery mode optical microresonators with diameters 1 5 um. Though elliptical 5 or even nonplanar crinkled 6 or spooled 7 wg morphologies exhibit advantageous features with respect to certain applications, this paper considers only closed wg modes. Em mode analysis for the rectangular waveguide comsol multiphysics tutorial5 vijanu. In this video, we will learn how to perform the mode analysis for the rectangular waveguide. For example, the new release includes a new app editor tool, graphical updates for running apps and more control over what the apps can do. We analyze the experimental data on the evolution of the microwave mw response of the whispering gallery mode wgm resonator. We plotted the quality factor due to the tetm fundamental whispering gallery mode radiation for various sphere diameters at 850nm.
Theoretical model for the coupling the whispering gallery modes are generally described by maxwell vector wave equation, which reduces to helmholtz. Em mode analysis for the circular waveguide comsol. Design module comsol multiphysics modeling software. Whispering gallery modes formation in small nanocavities. Investigation of the tunable plasmonic whispering gallery. This graphene based nanodisk cavity structure with an ultrasmall mode volume and large purcell factor is a promising candidate for high. The effect of a whispering gallery can be observed a similar way in another field of science entirely. Optothermal transport behavior in whispering gallery mode. How to simulate the whisperinggallery modes of dielectric microresonators in femlabcomsol how to simulate the whisperinggallery modes of dielectric microresonators in femlabcomsol oxborrow, mark 20070208 00. Whisperinggallerymode resonators certain compact electromagnetic structures support closed whisperinggallery wg modes. Comsol multiphysics alternatives and similar software. Onchip singlemode highq terahertz whispering gallery. The solutions to such an equation take the form of bessel functions also known as cylindrical harmonics and the whispering gallery modes are defined by three mode numbers.
Numerical evolutions of whispering gallery modes of both isotropic and anisotropic spheroidal resonators are presented and are used to build analytical approximations of these modes. Tao lu, supervisor department of electrical and computer engineering dr. Whispering gallery mode microcavities are ideally suited to form microlaser devices because the high circulating intensity within the. The true mode frequencies within a cylindrical resonator are eigenvalues of the appropriate wave equation. The design module expands the geometric modeling functionality of comsol multiphysics software by providing additional tools for creating geometries and importing a variety of cad file formats. Mar 03, 2010 the true mode frequencies within a cylindrical resonator are eigenvalues of the appropriate wave equation. Aug, 2018 in this video, we will learn how to perform the mode analysis. This content is presented at fem workshop organized.
Whispering gallery mode resonators comsol simulation tutorial for mode analysis of wgm resonators. Comsol multiphysics software video for single mode fiber, creating. The preparation of a geometry is an important part of the simulation process, where the focus is on finding the most suitable way to represent the cad design for analysis. How to simulate the whisperinggallery modes of dielectric.
Comsol multiphysics software understand, predict, and optimize. Implementation of the perfectly matched layer to determine. Pdf onchip singlemode highq terahertz whispering gallery. Calculating the spectral properties of an optical ring resonator. Whispering gallery mode resonators wgr are promising elements for future photonic devices, as they combine ultrahigh quality factor with small size and mode volume. Ahmadreza daraei, atefeh mohsenifard, mohammad kafi meibodi, whispering gallery modes formation in small nanocavities based upon crossed nanobeam structures, american journal of optics and photonics. Comsol multiphysics software video for single mode fiber, creating by kangkan vokto. Modematching analysis of whisperinggallerymode cavities by xuan du b. Theoretical model for the coupling the whispering gallery modes are generally described by maxwell vector wave equation, which reduces to. It is explained how femlab comsol multiphysics can be configured to calculate, the frequencies, electromagneticfield patterns, mode volumes, filling factors, radiation losses. The focus is on the thickness d f variation of the conducting endplates ceps from d f exceeding skin layer thickness. Surface plasmon coupled whispering gallery mode for guided.
Whispering gallery modes in standard optical fibres for fibre. Numerical simulation of eigenmodes of ring and race. We have performed a numerical study of whispering gallery modes of ring and race track optical. Numerical simulation of eigenmodes of ring and racetrack optical. Comsol webinar vibration and noise analysis in comsol multiphysics duration. Whispering gallery mode resonators comsol simulation. Comsol multiphysics software was used to simulate the. Browse solutions to common modeling questions, check for software updates, and log into comsol access to manage your active technical support cases.
Hi guys, i am trying to simulate whispering gallery modes in a plasmonic hybrid resonator. The comsol multiphysics software offers this level of flexibility with its builtin equation interpreter that can interpret expressions, equations, and other mathematical descriptions on the fly before it generates the numerical model. The application gallery features comsol multiphysics tutorial and demo app files pertinent to the electrical, structural, acoustics, fluid, heat, and chemical disciplines. You can find the number of modes that can be propagated with the lowest attenuation in any type of. See firsthand how the comsol software works in an interactive online demo tailored to discuss your needs. Whispering gallery mode resonators have various applications, for example, they can be used as frequency filters, temperature sensors and biosensors.
The qfactor of a highorder whispering gallery mode of 6 and an extremely small mode volume of 4. A whispering gallery mode based seismometer provides for receiving laser light into an optical fiber, operatively coupling the laser light from the optical fiber into a whispering gallery mode based optical resonator, operatively coupling a spring of a springmass assembly to a housing structure. The preparation of a geometry is an important part of the simulation process, where the focus is on finding the most suitable way to represent the. The modelling prepared within this work gives contribution to the erdf project no. An optical ring resonator left exhibits an effect similar to that of a whispering gallery right, but with light waves instead of sound. Controlling the lasing mode, emission direction, threshold, and quality factor of whisperinggallery mode lasing is important for practical applications such. The modelling of whispering gallery mode resonators. To calculate the spectral properties of the model, boundarymode analyses and a. Comsol simulation tutorial for mode analysis of wgm resonators. Comsol multiphysics tutorial for beginners how to model and simulate 3d geometry. The most common prism coupler is very robust, but uses free. Numerical approaches to modeling of wgm resonator and waveguide coupling. Analytical approximations of whispering gallery modes in.
Simulating an optical ring resonator in the comsol software. Optically pumped monolayer mose2 excitonic lasers from. Em mode analysis for the rectangular waveguide comsol. In this paper, we investigate conditions to form whispering gallery modes wgms in small nanocavities ncs which are designed at the intersection area of couple of nanobeams nbs structures. In this video, we will learn how to perform the mode analysis.
Such approximations are carried out mainly to have the possibility to have manageable analytic formulas for the eigenmodes and eigenfrequencies of anisotropic resonators. By virtue of continuous wave exciting mose2microsphere whisperinggallerymode wgm cavities, we realize multiple excitonic wgm lasing in the emission wavelength range of. Aug 14, 2018 in this video, we will learn how to perform the mode analysis for the rectangular waveguide. Surface plasmon coupled whispering gallery mode for. It is explained how femlab comsol multiphysics can be configured to calculate, the frequencies, electromagneticfield patterns, mode volumes, filling factors. Comsols main panel containing a falsecolor jet surface plot of the logarithmic electricfield intensity e 2 for this resonators te p 1,m 93 whisperinggallery mode. Aug 14, 2018 an optical ring resonator left exhibits an effect similar to that of a whispering gallery right, but with light waves instead of sound. Calculating the spectral properties of an optical ring. Comsol multiphysics tutorial2 watch this video to learn the building of 3d geometry and simulation in comsol. This content is presented at fem workshop organized by epfl in omt etn workshop series.
Due to the availability of analytical expressions for spherical resonators, we tested our model by determining the quality factors of a silica microsphere in air. The modelling of whispering gallery mode resonators core. Kondratiev 1, 1 russian quantum center rqc, skolkovo, moscow, russia. Reconfigurable liquid whispering gallery mode microlasers. You can fix this by pressing f12 on your keyboard, selecting document mode and choosing standards or the latest version listed if standards is not an option. Modematching analysis of whisperinggallerymode cavities. Alternativeto is a free service that helps you find better alternatives to the products you love and hate. The analysis was performed by comparing the numerical simulation results. Comsol simulation tutorial for thermal noises in wgm resonators. How to simulate the whisperinggallerymodes of dielectric. Modematching analysis of whisperinggallerymode cavities by. The nonparaxial gaussian beam formula for simulating wave optics. Whisperinggallery mode resonators wgr are promising elements for future photonic devices, as they combine ultrahigh quality factor with small size and mode volume. The crucial point in experimental usage of the wgm resonators is coupling to the rest optical circuit.