Akash Gupta

6 Questions 9 Answers 0 Followers

Questions related from Akash Gupta

How to prepare samples for the Raman spectroscopy in the liquid state measurement?

I have been working on 1D and 2D materials; now, I would like to measure the vibrational properties using the Raman spectroscopy of these samples in the liquid state measurement.

06 December 2021 6,721 3 View

Is any free software available to calculate the size of the nanoparticles from TEM and SEM images?

I have been doing TEM of nanoparticles, struggling to do size distribution of them.

17 September 2021 637 13 View

How to understand saturable absorption (SA) and reverse saturable absorption (RSA) in nonlinear optics?

I work on optical limiting materials, always face issues in understanding SA and RSA process in more fundamental ways.

28 April 2021 5,811 2 View

How to know charge transfer in photodetector under external bias voltage ?

I have been working on the graphene-based photodetector, I am getting photocurrent under illuminated light and bias voltage, however, I would like to know how the charge transfer contributing to...

13 April 2021 5,623 1 View

Why is photocurrent in graphene-based photodetector not scaled with illuminated light power?

I have been working on upconversion nanoparticle-graphene-based photodetector, and always have this issue, please explain it.

09 April 2021 7,167 4 View

How to understand the order of an optical nonlinear process?

I have been trying to understand the second and third-order nonlinear processes (specifically SHG and two-photon absorption). I am still unable to understand how the order of these nonlinear...

09 April 2021 4,410 8 View