Fig.1：Design concept of the merging-BIC photonic crystal laser. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Fig.1：Design concept of the merging-BIC photonic crystal laser.

Caption

Fig.1：Design concept of the merging-BIC photonic crystal laser. By tuning the structural parameters, multiple BICs move toward and merge at the Γ point in momentum space, forming a broader high-Q region. a, Schematic of the photonic crystal slab and BIC laser emission. b, Simulated photonic crystal band structure. d and d, Momentum-space Q-factor distributions of the BIC mode from before to after merging.

Credit

Wei Bao et al.

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