Piotr Pokryszka

3 Questions 5 Answers 0 Followers

Questions related from Piotr Pokryszka

How to remove the solid component from the reflectance spectrum (spectral measurements 350 - 650 nm)?

My task is the measurement of the reflection spectrum of the surface of a semiconductor structure. I am using a Xenon lamp as the light source. I am using an Ocean Optics USB4000 spectrometer as...

06 May 2023 290 6 View

Calculation of n and k from GaN/Sapphire thin film reflection measurements?

I would like to calculate the n and k of an approximately 1410 nm thick layer (GaN) deposited on a sapphire substrate by MOVPE at 1050 C, I have the reflectance spectrum of R = f(lambda) and the...

31 July 2022 6,054 0 View

Why are photoluminescence measurement lasers used rather than LEDs?

I would like to make photoluminescence measurements of GaN material at room temperature. At the moment I do not have a laser that I could use for this purpose. Can I replace the laser with an...

01 March 2021 1,584 6 View