Invariance of waveguide grating mirrors to lateral displacement phase shifts
Research output: Contribution to journal › Article › peer-review
Colleges, School and Institutes
- School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
We present a method to analyze the coupling of lateral displacements in nanoscale structures, in particular waveguide grating mirrors (WGMs), into the phase of a reflected Gaussian beam using a finite-difference time-domain simulation. Such phase noise is of interest for using WGMs in high-precision interferometry. We show that, to the precision of our simulations (10-7 rad), waveguide mirrors do not couple lateral displacement into phase noise of a reflected beam and that WGMs are therefore not subject to the same stringent alignment requirements as previously proposed layouts using diffraction gratings.
|Number of pages||3|
|Publication status||Published - 1 Jun 2013|