Title :
Comparison of the lasing modes of a microdisk and a microring
Author :
Zolotukhina, Anna ; Spiridonov, Alexander ; Karchevskii, Evgenii ; Nosich, Alexander I.
Author_Institution :
Dept. of Appl. Math., Kazan Fed. Univ., Kazan, Russia
Abstract :
Microcavity lasers shaped as thin circular disks are famous for the ultra-low thresholds of their whispering-gallery (WG) modes. We considered a two-dimensional (2-D) model of such a laser in free space with a ring-like active region and compared the characteristics of its modes with the modes of an active microring, i.e. a similar disk with a concentric hole. The comparison showed that a microring has considerable rarefaction effect in terms of emission thresholds, accompanied by the blue-shift of emission spectra. If the ring becomes narrower than half-wavelength in material, then all lasing modes obtain catastrophically high thresholds.
Keywords :
luminescence; microcavity lasers; microdisc lasers; spectral line shift; whispering gallery modes; 2-D model; WG mode; blue-shift; emission spectra; emission threshold; free space; lasing mode; microcavity laser; microdisk; microring; rarefaction effect; ring-like active region; two-dimensional model; whispering gallery mode; Eigenvalues and eigenfunctions; Indexes; Lasers; Microcavities; Optimized production technology; Resonant frequency; laser resonators; lasers; lasing modes; microdisk; microring; threshold of lasing;
Conference_Titel :
Transparent Optical Networks (ICTON), 2015 17th International Conference on
Conference_Location :
Budapest
DOI :
10.1109/ICTON.2015.7193655
