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6 papers · 2 filters
Pump-Controlled Modal Interactions in Microdisk Lasers
Seng Fatt Liew, Li Ge, Brandon Redding +2
We demonstrate an effective control of nonlinear interactions of lasing modes in a semiconductor microdisk cavity by shaping the pump profile. A target mode is selected at the expe…
Enhancement of Laser Power Efficiency by Control of Spatial Hole Burning Interactions
Li Ge, Omer Malik, Hakan E. Tureci
The laser is an out-of-equilibrium nonlinear wave system where the interplay of the cavity geometry and nonlinear wave interactions, mediated by the gain medium, determines the sel…
Rotation-induced Mode Coupling in Open Wavelength-scale Microcavities
Li Ge, Raktim Sarma, Hui Cao
We study the interplay between rotation and openness for mode coupling in wavelength-scale microcavities. In cavities deformed from a circular disk, the decay rates of a quasi-dege…
Active control of emission directionality of semiconductor microdisk lasers
Seng Fatt Liew, Brandon Redding, Li Ge +2
We demonstrate lasing mode selection in nearly circular semiconductor microdisks by shaping the spatial profile of optical pump. Despite of strong mode overlap, adaptive pumping su…
Exceptional points and lasing self-termination in photonic molecules
Ramy El-Ganainy, Mercedeh Khajavikhan, Li Ge
We investigate the rich physics of photonic molecule lasers using a non-Hermitian dimer model. We show that several interesting features, predicted recently using a rigorous steady…
Rotating optical microcavities with broken chiral symmetry
Raktim Sarma, Li Ge, Jan Wiersig +1
We demonstrate in open microcavities with broken chiral symmetry, quasi-degenerate pairs of co-propagating modes in a non-rotating cavity evolve to counter-propagating modes with r…