A 10λ wide Gaussian beam is incident at 30 degrees from air onto a lossless medium with dielectric constant 9.0. What is the angle of reflection?
Do the bands of a photonic crystal (or semiconductor) ever cross? If not, why not? If so, is there any special physical phenomenon that occurs at the crossing? And...if two bands cross, how do...
01 February 2018 8,604 4 View
I am interested in getting feedback on the attached diagram where I have attempted to create a map of the various types of waveguides. I think it can be confusing to students about waveguides vs....
07 August 2017 5,358 13 View
I am curious about everybody's take on the state-of-the-art on design and classification of metamaterials. Suppose I wish to identify a metamaterial with a specific permittivity and...
04 May 2017 7,916 5 View
I have grown a bit tired of seeing so many of the questions posed to ResearchGate become about how to use software. There are plenty of other forums on the internet for this. I would...
01 February 2017 10,192 2 View
I am working with a team to explore some new concepts for integrated optical waveguides that may significantly improve bend loss and coupling into and out of the waveguides. We are looking most...
11 December 2015 3,041 4 View
I am new to the field of MIMO, but we are working on a new technique to decouple multiple antennas that are in close proximity. As I understand it, ECC=0 means the antennas are completely...
31 December 2014 7,530 5 View
Almost any electromagnetics textbook will have a chapter on waveguides, usually starting with rectangular metal waveguides. The concept of TE and TM modes are presented where certain field...
05 June 2014 6,939 11 View
If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...
07 August 2024 5,343 2 View
Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...
07 August 2024 1,937 1 View
I am not able to get good literature and the physics behind how first these grains and grain boundaries arises out of no where when we make a pellet to study its dielectric properties and then how...
07 August 2024 5,177 3 View
I am currently using CASTEP version 2020. When I want to run optical properties calculations with spin-orbit coupling(SOC), I encounter the following error in a pop-up window before the job gets...
02 August 2024 2,890 0 View
I'm trying to perform a frequency calculation using Gaussian via MOBAXterm. The output shows no errors, however, there's no frequency as a result on gausview. The option "vibrations" is not...
31 July 2024 631 4 View
Hello everyone, I am new to this characterization but watching videos on youtube I have already plotted a Nyquist plot (Z' and -Z'') and already fitted models on my material using Zsim. But now I...
29 July 2024 1,376 0 View
How can we calculate the percentage of configuration interaction (CI) in the UV output data of the Gaussian program? for example: Excited State 17: Singlet-A 5.1359 eV 241.41 nm...
28 July 2024 9,165 2 View
Consider the case of negligible gravity but there is an accelerating reference frame. Its origin traces out a trajectory, or world line, seen in some inertial reference frame. The Lorentz metric...
24 July 2024 1,608 15 View
Can diamond be grown using molecular beam epitaxy?
22 July 2024 9,755 2 View
Hi everyone, I'm working on calculating the activation energies for some redox reactions using Gaussian, Here are the reactions I'm interesting: Py•−+ 3O2 → Py + 3O2•− Py•− + 1O2 → Py + 1O2•− Is...
18 July 2024 4,418 3 View