Supercontinuum generation in macromolecular media

C. Santhosh, A. K. Dharmadhikari, J. A. Dharmadhikari, K. Alti, D. Mathur

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The interaction of intense, ultrashort (femtosecond) pulses of infrared light with water leads to the generation of a white light supercontinuum due to nonlinear optical effects. This supercontinuum extends over the wavelength range 400-900 nm. The blue-sided components of this supercontinuum are due to laser-induced plasma effects and are found to sensitively depend on the presence in water of minute quantities of protein dopants (dilutions of 0.025%-0.1%). Salivary proteins like mucin and immunoglobulin-A lead to pronounced suppression of the blue-sided components, while proteins found in blood serum, such as transferrin, immunoglobulin G (IgG) and human serum albumin (HSA), do not show any such suppression. It is postulated that major salivary proteins have a propensity to efficiently scavenge plasma electrons and thereby extinguish the plasma that is formed upon laser irradiation.

Original languageEnglish
Pages (from-to)427-432
Number of pages6
JournalApplied Physics B: Lasers and Optics
Volume99
Issue number3
DOIs
Publication statusPublished - 01-05-2010

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proteins
retarding
blood serum
electron plasma
albumins
serums
water
lasers
dilution
irradiation
pulses
wavelengths
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Santhosh, C., Dharmadhikari, A. K., Dharmadhikari, J. A., Alti, K., & Mathur, D. (2010). Supercontinuum generation in macromolecular media. Applied Physics B: Lasers and Optics, 99(3), 427-432. https://doi.org/10.1007/s00340-010-3903-3
Santhosh, C. ; Dharmadhikari, A. K. ; Dharmadhikari, J. A. ; Alti, K. ; Mathur, D. / Supercontinuum generation in macromolecular media. In: Applied Physics B: Lasers and Optics. 2010 ; Vol. 99, No. 3. pp. 427-432.
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Santhosh, C, Dharmadhikari, AK, Dharmadhikari, JA, Alti, K & Mathur, D 2010, 'Supercontinuum generation in macromolecular media', Applied Physics B: Lasers and Optics, vol. 99, no. 3, pp. 427-432. https://doi.org/10.1007/s00340-010-3903-3

Supercontinuum generation in macromolecular media. / Santhosh, C.; Dharmadhikari, A. K.; Dharmadhikari, J. A.; Alti, K.; Mathur, D.

In: Applied Physics B: Lasers and Optics, Vol. 99, No. 3, 01.05.2010, p. 427-432.

Research output: Contribution to journalArticle

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