Emission Direction of Lasing (IMAGE)

Washington University in St. Louis

Emission Direction of Lasing

Caption

This is an artist's view showing the control of the emission direction of lasing at exceptional points in a whispering gallery mode microlaser. The tori and the spheres represent the microtoroid resonators and the scatterers, respectively. With two scatterers with appropriate sizes and locations in the field of the resonator, light is emitted in only one direction. The lasing is bidirectional when there is one or no scatterer.

Credit

B. Peng, F. Monifi, S. K. Ozdemir and L. Yang

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