Mahendar Kumbham

6 Questions 12 Answers 0 Followers

Questions related from Mahendar Kumbham

Strong focusing of z-dipole radiation with high-NA?

Hi, from many scientific articles (example, http://journals.aps.org/prx/abstract/10.1103/PhysRevX.5.021014), I see that when you focus the longitudinal dipole on pinhole (for confocal setup), its...

09 September 2015 6,340 2 View

What it the physical meaning of negative scattering cross-section?

I am modelling extinction cross-section of scatterer in COMSOL. When I give refractive index x+i*y for scatterer, the calculated scattering cross-section is negative and absorption cross-section...

05 May 2015 6,311 6 View

Does anyone know about Laguerre-Gauss beam modelling in COMSOL?

Hi, Can anybody suggest me how to model focusing Laguerre-Gauss beam (Vortex beam) in COMSOL waveoptics module?. I am looking for suggestion of equation in Cartesian coordinates?. Anybody has...

04 April 2015 7,057 3 View

What is the birefringence value of Paclitaxel (Taxol) at room temperature?

Can anybody help me to find out birefringence value of Paclitaxel (Toxol), ordinary and extraordinary refractive index values, for computational modelling in COMSOL? Thanks, Mahendar.

11 November 2014 8,804 4 View

Is anyone familiar with the permeability and permittivity values of a conventional glass slide (soda lime glass)?

Can anybody help me to find the permittivity and permeability values of a Glass slide for modelling purposes? I assume microscopic glass slides are made of soda lime glass. Although, I could not...

10 October 2014 8,269 3 View

Can anybody provide me the complex refractive index of polystyrene at mid-IR?

I am modelling polystyrene sphere in COMSOL. I am looking for the complex refractive index (k value particularly) of polystyrene at 3.4 um where C-H absorption takes place. Anybody has this data...

10 October 2014 9,528 5 View