title: Narrowband, polarization-independent free-space wave notch filter.
abstract: A two-dimensional-corrugated-slab-waveguide add/drop filter providing 100% resonant reflection at 1.55 microm wavelength for both TE and TM polarizations with identical FWHM is designed. The fabricated device exhibits a reflectivity spectrum of more than 95% peak reflection for both polarizations at 1.537 microm. The coupling scheme involves the TE0 guided mode only; it is made relatively tolerant by means of a double-sided crossed grating.
authors.affiliation: Friedrich-Schiller University, Institute of Applied Physics, Max-Wien Platz 1, 07745 Jena, Germany.
authors.forename: Tina
authors.initials: T
authors.lastname: Clausnitzer
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Tishchenko
authors.forename: Ernst-Bernhard
authors.initials: EB
authors.lastname: Kley
authors.forename: Hans-Jörg
authors.initials: HJ
authors.lastname: Fuchs
authors.forename: Detlef
authors.initials: D
authors.lastname: Schelle
authors.forename: Olivier
authors.initials: O
authors.lastname: Parriaux
authors.forename: Ulrich
authors.initials: U
authors.lastname: Kroll