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An ordinary bubble can serve as an optofluidic laser. These bubble lasers have been made of dye-doped soap solutions and smectic liquid crystal. In a bubble laser, the bubble itself serves as the optical resonator.[1] Uniquely, bubble lasers exhibit hundreds of regularly spaced resonant frequencies called whispering gallery modes, named for the Whispering Gallery in St. Paul's Cathedral in London.[1][2] Researchers have found that the emission spectrum of a bubble laser is highly dependent on the bubble's environment; changing ambient air pressure or electric fields changes the size of the bubble (the optical resonator), and therefore the wavelengths of laser emission.[3]
^ abMiller, Johanna. "Bubble lasers can be sturdy and sensitive". Physics Today. American Institute of Physics. Retrieved 2 April 2024.
^Korenjak, Zala (5 January 2024). "Smectic and Soap Bubble Optofluidic Lasers". Physical Review X. 14 (1): 011002. arXiv:2306.14676. Bibcode:2024PhRvX..14a1002K. doi:10.1103/PhysRevX.14.011002. Retrieved 2 April 2024.
^Popa, Stefan (15 March 2024). "Soap bubbles transform into lasers". Physics World. Institute of Physics. Retrieved 6 April 2024.
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