Inactivation of viruses by laser-driven coherent excitations via impulsive stimulated Raman scattering process

Kong-Thon Tsen, Shaw Wei D Tsen, Chih Long Chang, Chien Fu Hung, T. C. Wu, Juliann G. Kiang

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


The inactivation of viruses such as M13 bacteriophages subject to excitations by a very low power visible femtosecond laser has been studied. Our experimental results show that for a visible femtosecond laser having λ=425 nm and a pulse width of 100 fs, the M13 bacteriophages are inactivated when the laser power density is greater than or equal to 49 MW cm2. The medium lethal laser power density (LD50) is 51.94±0.14 MW cm2. The functionality of M13 bacteriophages has been shown to be critically dependent on the pulse width as well as power density of the excitation laser. Our work demonstrates that by using a very low power visible femtosecond laser, it is plausible to inactivate viruses such as the M13 bacteriophages through impulsive stimulated Raman scattering process. These experimental findings suggest a novel avenue of selectively inactivating microorganisms while leaving the sensitive materials unharmed by manipulating and controlling with femtosecond laser systems.

Original languageEnglish (US)
Article number064030
JournalJournal of biomedical optics
Issue number6
StatePublished - 2007


  • Femtosecond laser
  • Impulsive stimulated Raman scattering
  • Inactivation
  • M13 bacteriophage

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering


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