![fdtd comsol fdtd comsol](https://www.researchgate.net/publication/337463944/figure/fig2/AS:828247323471879@1574480958127/The-substrate-optimization-a-COMSOL-simulations-were-conducted-to-evaluate-the-most.png)
For the wafer-scale fabrication, NWs can be assembled by di-electrophoresis. For these reasons, single NW components are considered as promising building blocks for integration with SiN photonic platforms. Single NW photodetectors based on the photoconductive operation principle or p–n junction photodiodes have demonstrated high sensitivity. Despite their small size, single NW light emitting diodes (LEDs) can produce bright electroluminescence. Thanks to their direct tunable bandgap and reduced dislocation density, nitride nanowires (NWs) have become important materials for optical components in the visible to ultraviolet (UV) spectral range.
![fdtd comsol fdtd comsol](https://cdn.comsol.com/wordpress/2014/01/m_nonzero_mode.png)
However, for both approaches, to generate and detect light, active elements need to be co-integrated with the SiN platform. SiN elements can be embedded into SiO 2, or alternatively, SiN suspended membranes can be used to enhance the performance. For passive photonic circuits used in the visible light range, SiN circuitry is gaining increasing attention. This approach presents the advantage of providing both passive and active elements, however it brings many fabrication challenges (such as the necessity of low-loss GaN waveguides, etc). One exploratory approach for visible photonics consists of the monolithic integration of InGaN emitters/detectors with GaN-based waveguides. The technology for visible wavelength PICs is much less mature than for IR PICs, and different approaches have been explored. However, for life science applications (biosensors, molecular diagnostics, food inspection, etc.) visible light communication systems are required. This approach is useful for providing insights into the relative nonlinear response of two similar structures, which can be used to optimize molecular structure.Today, infrared (IR) photonic integrated circuits (PICs) represent a well-established technology with numerous applications in optical telecommunications. We QChem for performing density functional theory modeling of the small organic molecules that are synthesized in the lab.We use ABAQUS when performing mechanical modeling of 3D printed elastomeric structures. The most frequent models incorporate E&M, heat and mass transfer, mechanical behavior and kinetics. COMSOL allows different physical phenomena to be linked together – for example, mass transport of a biological species to the surface of a sensor and it binding kinetics at the surface. We use COMSOL Multiphysics to model the complex, inter-related, time-dependent behaviors of our optical devices. We use two different finite element method softwares: COMSOL Multiphysics and ABAQUS.Depending on the scale needed, simulations are in 2D or 3D. For example, we model the location, profile and intensity of the field. We use finite difference time domain, specifically Lumerical, to model many of the properties of the optical fields in our waveguides and resonators.Link: Īsymmetry in toroidal shape gives rise to degenerate opto-mechanical modes.
![fdtd comsol fdtd comsol](https://ksugahar.weebly.com/uploads/4/9/4/5/49455071/1957859_orig.jpg)
Socorro et al, Optics Express 23 (3) (2015). Impact of high index coating on optical mode profile. Soltani et al, Applied Physics Letters 105 051111 (2015). Combination of thermal and optical imaging allows precise modeling of the opto-thermal effect in UHQ devices.