Rituraj Borah

6 Questions 7 Answers 0 Followers

Questions related from Rituraj Borah

Is plasmon red-shift in dielectric medium is actually a blue shift?

Take for example a 20 nm Ag NP with its LSPR in air at 400 nm. Now when this nanoparticle will be in water, light will refract from air to water to interact with it. Since the wavelength of all...

02 February 2020 6,839 4 View

How accurate are different methods for electromagnetic simulations employed for plasmonic nanostructure optical interaction?

My present investigation involves simulation of optical interaction of plasmonic nanostructures using COMSOL Multiphysics (frequency domain analysis). To ensure that my results are free from any...

06 June 2019 6,166 5 View

What are critical numerical parameters for electromagnetic simulation of large nanoparticles?

My COMSOL EM simulations of plasmonic and dielectric nanoparticles do not seem to be correct. For instance, the optical spectra for 100 nm silica nanoparticle is a decay plot as expected. However...

06 June 2019 5,272 2 View

Plasmonics: In a system of two nanoparticles in a medium, will one nanoparticles change the background electric field for the other?

I am trying find the find the extinction cross section of an array of nanoparticles suspended in water. Usually, when there is a substrate present (Ex. glass), we first solve for the background...

07 July 2018 5,884 2 View

Why am I not able to get an absorption and extinction cross section that matches with experimental results?

I am trying to simulate plasmonic resonance of gold nanoparticles in water medium in COMSOL Multiphysics 5.2. I have so far been unsuccessful in reproducing results reported in past works. When I...

06 June 2018 9,941 0 View

How to find the dielectric function of gold nanoparticles?

I am trying to simulate interaction of light with core-shell gold nano-particles to study photothermal phenomena (Solving Maxwell's equation), for which, I need the frequency dependent dielectric...

06 June 2018 9,791 2 View