title: Graphene-based absorber exploiting guided mode resonances in one-dimensional gratings.
abstract: A one-dimensional dielectric grating, based on a simple geometry, is proposed and investigated to enhance light absorption in a monolayer graphene exploiting guided mode resonances. Numerical findings reveal that the optimized configuration is able to absorb up to 60% of the impinging light at normal incidence for both TE and TM polarizations resulting in a theoretical enhancement factor of about 26 with respect to the monolayer graphene absorption (≈2.3%). Experimental results confirm this behavior showing CVD graphene absorbance peaks up to about 40% over narrow bands of a few nanometers. The simple and flexible design points to a way to realize innovative, scalable and easy-to-fabricate graphene-based optical absorbers.
authors.forename: M
authors.initials: M
authors.lastname: Grande
authors.forename: M A
authors.initials: MA
authors.lastname: Vincenti
authors.forename: T
authors.initials: T
authors.lastname: Stomeo
authors.forename: G V
authors.initials: GV
authors.lastname: Bianco
authors.forename: D
authors.initials: D
authors.lastname: de Ceglia
authors.forename: N
authors.initials: N
authors.lastname: Aközbek
authors.forename: V
authors.initials: V
authors.lastname: Petruzzelli
authors.forename: G
authors.initials: G
authors.lastname: Bruno
authors.forename: M
authors.initials: M
authors.lastname: De Vittorio
authors.forename: M
authors.initials: M
authors.lastname: Scalora
authors.forename: A
authors.initials: A
authors.lastname: D'Orazio