Photonic crystal based ultra-sensitive interferometric nanometer displacement sensor

Date Issued
2020-09-14
Author(s)
Sadhukhan, Snehashis
Laha, Arnab
Biswas, Abhijit
Ghosh, Somnath
DOI
10.1364/FIO.2020.JTu1A.3
Abstract
A very high precision interferometric sensor with a resolution up to ~λ/1940 is reported, exploiting Talbot effect, revivals of the initial phase, oscillation in transverse momentum, multimode interference inside a hollow photonic bandgap waveguide.