Review of Scientific Instruments, Journal Year: 2023, Volume and Issue: 94(9)

Published: Sept. 1, 2023

Momentum space distribution of photons coming out any light emitting material/device provides critical information about their underlying physical origin. Conventional methods determining such properties impose specific instrumentational difficulties for probing samples kept within a low temperature cryostat. There were past studies to measure one-dimensional coherence function, which could then be used extracting momentum information, as well reports measurements just two-dimensional (2D) function. However, all those are associated with additional experimental complexities. So, here we propose simpler, modified Michelson interferometer based optical setup that is at room and placed outside the cryostat distance away from it. We initially 2D function emitted light, can directly estimate in-plane by calculating its fast Fourier transform. also discuss how this method overcome encountered in past. Similar instrumentations extended resolved astronomical telecommunications involving distant sources.

Language: Английский