title: Wavelength and intensity switching in directly coupled semiconductor microdisk lasers.
abstract: We demonstrate output wavelength and intensity switching in a three-element directly coupled microdisk device consisting of one spiral microdisk coupled to two semicircle microdisks. The gapless coupling mechanism used allows individual elements to achieve lasing while achieving optimal transfer of optical power between adjacent microdisks. By controlling the transparency of the center element via injection current, the edge elements can be allowed to exchange their amplified spontaneous emission. In this manner, on-off-on switching of the output intensity, as well as discontinuous shifts in the output wavelength, can be achieved as a function of increasing injection current.
authors.affiliation: Department of Applied Physics and Center for Laser Diagnostics, Yale University, New Haven, Connecticut, 06511, USA. gustavo.fernandes@yale.edu
authors.forename: Gustavo E
authors.initials: GE
authors.lastname: Fernandes
authors.forename: Laurent
authors.initials: L
authors.lastname: Guyot
authors.forename: Grace D
authors.initials: GD
authors.lastname: Chern
authors.forename: Michael
authors.initials: M
authors.lastname: Kneissl
authors.forename: Noble M
authors.initials: NM
authors.lastname: Johnson
authors.forename: Qinghai
authors.initials: Q
authors.lastname: Song
authors.forename: Lei
authors.initials: L
authors.lastname: Xu
authors.forename: Richard K
authors.initials: RK
authors.lastname: Chang