Invariance of waveguide grating mirrors to lateral displacement phase shifts

Research output: Contribution to journalArticlepeer-review


  • F. Brückner
  • D. Brown
  • D. Friedrich
  • R. Schnabel

Colleges, School and Institutes

External organisations

  • 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.


Original languageEnglish
Pages (from-to)1844-1846
Number of pages3
JournalOptics Letters
Issue number11
Publication statusPublished - 1 Jun 2013