title: Widely tunable monolithic narrowband grating filter for near-infrared radiation.
abstract: We propose a monolithic narrowband guided-mode grating filter in fused silica that is widely tunable in the near-IR wavelength region. Based on a recently demonstrated approach for a monolithic reflector comprising an encapsulated grating, we theoretically investigate such a device by means of rigorous modeling aimed at a narrow linewidth. It is demonstrated that upon a spatial variation of the filter's grating period its resonance wavelength can be tuned in a remarkably wide range of near-IR radiation with 800 nm<λ(res)< 1600 nm by translating the laser beam relative to the grating area. The filter performance in terms of linewidth and contrast is essentially preserved over the entire tuning interval.
authors.affiliation: Institut für Angewandte Physik, Friedrich-Schiller-Universität Jena, Jena, Germany. frank.brueckner@uni‑jena.de
authors.forename: Frank
authors.initials: F
authors.lastname: Brückner
authors.forename: Stefanie
authors.initials: S
authors.lastname: Kroker
authors.forename: Daniel
authors.initials: D
authors.lastname: Friedrich
authors.forename: Ernst-Bernhard
authors.initials: EB
authors.lastname: Kley
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann