title: Controllable lasing behavior enabled by compound dielectric waveguide grating structures.
abstract: The photonic density of states (PDOS) is one of the key physical quantities governing the lasing behavior for photonic band-edge lasers. The PDOS is conventionally altered by exploiting the high-Q band-edge mode within a device, which is typically achieved by increasing the contrast of periodic refractive index variation (Δn) or increasing the periodic number of the photonic crystals. In this paper, we propose a different approach to achieve a high-Q band edge mode within an active compound dielectric waveguide grating (CWDG). We demonstrate that the lasing threshold and intensity can be flexibly tuned by changing the filling factors of the CWDG. This design can effectively improve the performance of electrically pumped photonic band-edge lasers.
authors.forename: Zhenqing
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yunhui
authors.initials: Y
authors.lastname: Li
authors.forename: Wenxing
authors.initials: W
authors.lastname: Liu
authors.forename: Jinzhe
authors.initials: J
authors.lastname: Yang
authors.forename: Youqiao
authors.initials: Y
authors.lastname: Ma
authors.forename: Hai
authors.initials: H
authors.lastname: Lu
authors.forename: Yong
authors.initials: Y
authors.lastname: Sun
authors.forename: Haitao
authors.initials: H
authors.lastname: Jiang
authors.forename: Hong
authors.initials: H
authors.lastname: Chen