title: Hybrid grating reflector with high reflectivity and broad bandwidth.
abstract: We suggest a new type of grating reflector denoted hybrid grating (HG) which shows large reflectivity in a broad wavelength range and has a structure suitable for realizing a vertical cavity laser with ultra-small modal volume. The properties of the grating reflector are investigated numerically and explained. The HG consists of an un-patterned III-V layer and a Si grating. The III-V layer has a thickness comparable to the grating layer, introduces more guided mode resonances and significantly increases the bandwidth of the reflector compared to the well-known high-index-contrast grating (HCG). By using an active III-V layer, a laser can be realized where the gain region is integrated into the mirror itself.
authors.forename: Alireza
authors.initials: A
authors.lastname: Taghizadeh
authors.forename: Gyeong Cheol
authors.initials: GC
authors.lastname: Park
authors.forename: Jesper
authors.initials: J
authors.lastname: Mørk
authors.forename: Il-Sug
authors.initials: IS
authors.lastname: Chung