Lekshmi Jayamohan

3 Questions 2 Answers 0 Followers

Questions related from Lekshmi Jayamohan

Is it possible to have no result from closed aperture z-scan even when open aperture shows reverse saturable absorption?

The material is an aqueous solution of a dye which shows nonlinear absorption when excited at 532 nm, but no nonlinear refraction(no result from closed aperture).

18 July 2025 9,967 0 View

How is effective length calculated for a drop cast film?

I have done an open aperture z-scan on a dye-doped PVA film drop casted on a glass substrate. In order to calculate the effective length Leff, do I take sample thickness L as that of the film or...

14 October 2023 4,876 0 View

How can a dye with absorption in the 300-400 nm region have an orange colour?

I have prepared an azo dye with orange colour in polar solvents. As is seen in the absorption spectra, absorption is in the UV region and up to around 400 nm in the visible. However, an orange...

30 July 2023 9,212 5 View