Comsol optical waveguide simulation pdf

Enter your mobile number or email address below and we'll send you a link to download the free Kindle App. Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required. Would you like to tell us about a lower price? If you are a seller for this product, would you like to suggest updates through seller support?

The simulations include the use of geometrical ray tracings for point source and full electromagnetic waves source employing the Maxwell's wave equations for plane wave input.

Both 2D and 3D simulation results will help in visualize the electromagnetic field propagating inside the waveguides and devices. Readers without fundamental handle on optics modeling are suggested to read the Optics Modeling and Visualization with COMSOL Multiphysics: A step by step graphical instruction manuscripts for detailed discussion.

These models may be expanded to post-graduate research and industrial photonics waveguides and devices development. Volume 1 models include 3D single mode optical fiber, planar waveguide, channel waveguide, longitudinal and transverse phase modulator, surface plasmon, optical square waveguide, tapered waveguide, FTIR beamsplitter in ray tracing and electromagnetic wave solvers, full prism coupler, halved prism coupler, plano convex overlay lens, overlay Luneburg lens, geodesic lens with control setup for resulted electric field comparison, corrugated gratings, transmission and reflection gratings, chirped grating lens, beam expander grating, grating coupler, chirped grating coupler, buried channel waveguide.

Volume 2 models continue with the ridge channel waveguide, strip loaded channel waveguide, GaAs GaAlAs planar waveguide, GaAs GaAlAs heterostructure waveguide, radiation leaks at fiber bend, radiation leaks at waveguide bend, c-axis Calcite polarizer waveguide, integrated optic normal reflector, horn channel waveguide, Y-Junction waveguide, optical phase modulator, cut off modulator, electro optic Mach-Zehnder interferometer waveguide, parallel coupling waveguide, electro optic directional coupler, single polished fiber directional coupler, double polished fiber directional coupler, tunable-coupling strength of polished double fiber coupler, cross sectional coaxial fiber coupler, 2D directional coupler with tapered coupling, corrugated reflection gratings, optical fiber grating on half polished fiber coupler, and track-changing reflector with grating assisted-coupling fiber.

Read more Read less. To get the free app, enter mobile phone number. See all free Kindle reading apps. Customer reviews. How does Amazon calculate star ratings? Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average.

comsol optical waveguide simulation pdf

The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness. Review this product Share your thoughts with other customers. Write a product review. No customer reviews.This website uses cookies to function and to improve your experience. By continuing to use our site, you agree to our use of cookies.

Researchers from the University of Campinas and Corning use electromagnetics and solid mechanics analysis to investigate a different kind of coupling: how photoelastics and moving boundary effects work together to enhance or suppress Brillouin scattering in waveguides, optical fibers, and other nanophotonic structures. Brillouin optomechanical interaction involves a coupling between two effects. First, there is the moving boundary effect, in which just the boundary or geometry of the device is considered.

In general, the moving boundary effect comes into play, for instance, when making a waveguide thinner. The photoelastic effect, on the other hand, considers the materials involved. Here, it is the refractive index in the waveguide that is modified due to elastic strain in the material.

Think about the design of a tapered optical fiber. Every time you perturb the geometry, it affects the Brillouin optomechanical scattering occurring in the design.

This is the moving boundary effect. The photoelastic effect considers the materials of which the fiber is made, which also affects the interaction. When accounting for Brillouin scattering in an optomechanical design, you often want to either enhance or suppress the effect.

For example, in a regular optical fiber, Brillouin scattering is an impairment in communication systems that causes a lot of light to scatter backward instead of propagate forward. This could mean that little to no light travels through the fiber from its input source. Examples where this is an important design consideration include regular fibers and accelerometers Figure 1.

So, when would you want to enhance Brillouin scattering effects? One example is on integrated waveguides. For instance, you can manipulate the mechanical interactions in these waveguides to create a narrow-bandwidth laser, or use Brillouin scattering to specify frequencies and wavelength channels for an exceptionally accurate filter.

One of their main goals was to understand the coupling of the photoelastic effect and moving boundary effect in nanophotonic structures to set up more effective or, in some cases, ineffective couplings, depending on whether the device calls for enhanced or suppressed Brillouin scattering.

How did the team from the University of Campinas gain a deeper understanding of this complex interplay? One way is through the use of multiphysics simulation. They started with 2D simulations that are both easy to simulate and good observatory examples.

They started with simple examples, like a single silica rod, and integrated both electromagnetics and solid mechanics physics into their analyses — eventually building up to fully integrated nanophotonic structures Figure 2. The team then used their simulation results to calculate the overlap integrals between optical and mechanical fields, one of the main aspects of Brillouin scattering.

comsol optical waveguide simulation pdf

Solving for both photoelastic and moving boundary effects in the same study makes it easy to integrate them, compared to solving for one physics, exporting the results, going back and solving for the other, and so on. Another helpful tool is the user interface UI in general.Questo sito web utilizza i cookie per rendere efficienti i nostri servizi e per migliorare la tua esperienza di navigazione.

Continuando a usare il sito, accetti il loro utilizzo. Surface Plasmons SP or Surface Plasmon Polaritons SPP are electromagnetic excitations that propagate at the interface between a dielectric and a conductor, and are evanescently confined in the perpendicular direction to the propagation. From an electrodynamic view, SPs are a particular case of a surface wave: from the optics view, SPs are optical modes of an interface: from the solid-state physics view, SPs are collective excitation of electrons.

Surface plasmonic waveguides have the ability to confine light at sub-wavelength scale and have a large number of applications in the field of nanocircuits, nanophotonics devices, biological and chemical sensors, holography, and other applications.

comsol optical waveguide simulation pdf

Use of plasmons in electric circuits, or in an electric circuit analog, combines the size efficiency of electronics with the data capacity of photonic integrated circuits. Both surface plasmon polaritons propagating along the metal-dielectric interfaces and localized surface plasmon modes supported by metal nanoparticles are characterized by large momentum values, which enable strong resonant enhancement of the local density of photon states and can be utilized to enhance weak optical effects of opto-electronic devices.

Different plasmonic waveguide structures have been proposed, such as layered structures, metallic nanowires, metallic nanoparticle arrays, hybrid wedge plasmonic waveguides, and other configurations. Here, a typical plasmonic waveguide consisting of a thin film sandwiched between a cladding cover and a substrate will be considered. Results are compared against an analytic solution developed by Orfanidis [1].

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. Esci Accedi Contatti. OK Ulteriori informazioni. Ricerca rapida. Plasmonic Waveguide Analysis. Koppenhoefer [1], S. Yushanov [1], J. Published in Diese Website verwendet Cookies, um einwandfrei zu funktionieren und Ihr Erlebnis zu verbessern.

Introduction The monitoring of bacteria concentration in drain fluid is the most common way to estimate the success of a colon surgery.

Intervista a firstonline del prof r varaldo

However, the lack of efficient method to follow the development of E. The proposed device can reduce the diagnostic time to a few minutes with a low cost solution. The surface of the functionalized waveguide can capture E. In result, the power transmitted through the optical path is affected compared with another reference one. To reduce the coupling loss and misalignment effect, tapered couplers are designed to be added to the input and output of the waveguide.

Model definition A waveguide core embedded in air consists of two parts. The straight part works as the sensing region, and the other tapered part is a coupler connected to the fiber. There is an alignment issue. So the model is setup to factor out the transmittance varying depending on different taper angle, so that we can investigate the relationship between transmittance and taper angle.

Because the propagation is much longer than the wavelength, Electromagnetic Waves, Beam Envelopes interface and Electromagnetic Waves, Frequency Domain are both suitable.

There are perfectly matched layers PMLs around and the remaining space between the waveguide and the PMLs is filled with air. The ports are at the boundary between core domain and the PML. The interior port boundaries with PML backing require the silt condition. The port orientation is specified to define the inward direction for the S-parameter calculation.

Since higher order modes are not our interest in the simulation, the combination of Domain-backed type slit port and PMLs is used. The wave is excited at the port on the right side port 1 and the other port port 2 are on the left side. The remaining is mapped. To factor out the transmittance varying depending on different taper angle, Parametric Sweep is also adopted.

Results To determine the structural dimension, the relationship between alpha and transmittance need to be researched. The influences of angle variables on the transmittance are expected to be plotted.

So we bring in Global Evaluation to calculate the transmittance abs ewfd.

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. Produkte Videogalerie Webinare Blog Support. Abmelden Anmelden Kontakt.

OK Mehr erfahren. Meng [1], Y. Xin [1], P.Questo sito web utilizza i cookie per rendere efficienti i nostri servizi e per migliorare la tua esperienza di navigazione. Continuando a usare il sito, accetti il loro utilizzo.

Propagating electric field distribution in a SOI waveguide is called mode of the waveguide. Photonic gratings are formed by etching grooves on the top of a waveguide. Gratings can operate in two directions.

They can guide incident beam into a waveguide or a waveguide mode out of the structure. We study the grating operation by utilizing optical reciprocity, which manifests that coupling of light between a waveguide and an optical fiber should not depend on the propagation direction.

This principle allows for study of operation in two directions and determination of the coupled and lost power. Acquired knowledge is used to optimize the grating geometry. 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.

Esci Accedi Contatti. OK Ulteriori informazioni. Ricerca rapida. Erdmanis[1], I. Published in Questo sito web utilizza i cookie per rendere efficienti i nostri servizi e per migliorare la tua esperienza di navigazione. Continuando a usare il sito, accetti il loro utilizzo.

On the surface of an optical waveguide, there is an evanescent field. The evanescent field decays fast and this steep gradient can be used to pull nano- and microparticles down towards the waveguide surface. Radiation forces will propel the particle forward along the waveguide. Trapping on an optical waveguide can be used to manipulate particles in a lab-on-a-chip system where optical methods are also used to detect and characterize the particles.

The particles are normally submerged in water acting as top-cladding and various types of particles can be trapped, e.

Several types of optical functions have been demonstrated, e. Numerical simulations have been used to study the trapping process and to design new structures for trapping. In this presentation, the method to calculate optical forces will first be reviewed. Normally, optical forces are calculated directly from the Maxwell stress tensor.

However, for low index contrast, it can be advantageous to first calculate the optical pressure Fig. In the second part of the presentation, results will be shown for several types of particles and structures, e. In addition to simulation of optical forces, it will be shown how the transmitted amplitude and phase of the light in the waveguide is influenced by the trapping of a particle.

Plotly map chart python

Some experimental results will be included. 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. Esci Accedi Contatti. OK Ulteriori informazioni. Ricerca rapida. Optical Trapping on Waveguides. Published in This website uses cookies to function and to improve your experience. By continuing to use our site, you agree to our use of cookies.

The information provided may be out of date. Discussion Closed This discussion was created more than 6 months ago and has been closed.

Most clingy male zodiac sign

To start a new discussion with a link back to this one, click here. Hello Roy Shiloh Your Discussion has gone 30 days without a reply.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base. 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.

Crown ce 4000 watt

Log Out Log In Contact. OK Learn More. Discussion Forum. Forum Home. New Discussion.

Robocopy copy all files and folders

Send Private Message Flag post as spam. Please login with a confirmed email address before reporting spam. Send a report to the moderators. Hello, I'm attempting to simulate a simple slab waveguide see attached.

This design is surrounded by PML rectangles. I would like to know the core power input left and output right. To this end, I have two questions: 1.

What Is the Beam Envelope Method?

I would like to take the core middle subdomainintegrate the y-values and get a vector of the average power in each x value of the core. According to this vector I'd like to generate a graph of the decline of power from input to output as a function of propagation length x. Is this possible in Comsol?

Harley davidson breakout specs

Gak