Sensitivity Enhancement through Interference
Physics
The variation in phase of the resultant field being non-linearly related to the changes in phase difference between the interfering complex fields, the ensuing enhancement in sensitivity for phase detection in optical metrology is achieved.
Ref: T S Athira, Dinesh N Naik, “Amplified sensing of optical phase difference through the phase of the resultant field”, J. Opt. 23 115606, 2021.