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Journal of Biomedical Optics

Inactivation of viruses by laser-driven coherent excitations via impulsive stimulated Raman scattering process
Author(s): Kong-Thon Tsen; Shaw-Wei D. Tsen; Chih-Long Chang; Chien-Fu Hung; T. C. Wu; Juliann G. Kiang
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Paper Abstract

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.

Paper Details

Date Published: 1 November 2007
PDF: 6 pages
J. Biomed. Opt. 12(6) 064030 doi: 10.1117/1.2821713
Published in: Journal of Biomedical Optics Volume 12, Issue 6
Show Author Affiliations
Kong-Thon Tsen, Arizona State Univ. (United States)
Shaw-Wei D. Tsen, Johns Hopkins Univ. (United States)
Chih-Long Chang, Johns Hopkins Univ. (United States)
Chien-Fu Hung, Johns Hopkins Univ. (United States)
T. C. Wu, Johns Hopkins Univ. (United States)
Juliann G. Kiang, Armed Forces Radiobiology Research Institute (United States)

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