Problem 9: Light Whiskers

When a laser beam enters a soap film at a small angle, a rapidly changing pattern of thin, branching light tracks may appear inside the film. Explain and investigate this

I. Phenomenon Demonstration

II. Books, Encyclopedia, Discussion and Forum Posts

III. Research Paper

  • Startsev, A. V., & Stoilov, Y. Y. (2003). A miracle happening to a laser beam in a soap film. Quantum Electronics, 33(5), 380–382. doi:10.1070/qe2003v033n05abeh002422
  • Startsev, A. V., & Stoilov, Y. Y. (2004). On the nature of laser polariton tracks in soap films. Quantum Electronics, 34(6), 569–571. doi:10.1070/qe2004v034n06abeh002775
  • Emile, O., & Emile, J. (2014). Soap films as 1D waveguides. Optofluidics, Microfluidics and Nanofluidics, 1(open-issue).
  • Startsev, A. V., & Stoilov, Y. Y. (2012). Laser tracks in rainbow films on water. Quantum Electronics, 42(8), 750–752. doi:10.1070/qe2012v042n08abeh014844
  • Emile, J., Emile, O., & Casanova, F. (2013). Light guiding properties of soap films. EPL (Europhysics Letters), 101(3), 34005. doi:10.1209/0295-5075/101/34005
  • Patsyk, A., Bandres, M. A., Sivan, U., & Segev, M. (2019, May). Observation of branched flow of light. In 2019 Conference on Lasers and Electro-Optics (CLEO) (pp. 1-2). IEEE. doi:10.1038/s41586-020-2376-8