Subir Das

5 Questions 10 Answers 0 Followers

Questions related from Subir Das

How to calculate the stimulated emission (SE) cross section of a fluorescent dye?

In STED microscopy, typical stimulated emission cross section (σ) for single molecules is ~ 10^(-17) cm^2. This value depends on cross section of the STED laser beam. But, I am more curious to...

09 September 2018 1,879 0 View

How to calculate noise power (dBm) of a photodiode?

I want to check the thermal noise spectrum of a photodiode (PD) at different frequency response but I do not know how to calculate it. Below graph is an example which shows noise power (dBm) as a...

05 May 2018 5,267 0 View

Which citation style should I use for OSA express journals in the Endnote software?

I want to insert citation using Endnote. But I have a little confusion regarding citation style for OSA express journals.

01 January 2017 6,083 6 View

What is the one-photon fluorescence emission rate of a single fluorescent molecule?

The two-photon fluorescence emission rate of a single fluorescent molecule (R) can be express as R = frep kexc τexc η Where, frep= Repetition rate of the excitation pulse kexc= Two-photon...

01 January 2017 2,738 1 View

How to detect fluorescence signal from fix cell using lock-in amplifier?

I am using stimulated emission based pump-probe microscopy technique to detect fluorescence. For application purpose, I want to do some cell imaging. But, When I use excitation beam at 635 nm to...

12 December 2016 2,959 4 View