Influence of absorption induced thermal initiation pathway on irradiance threshold for laser induced breakdown

Babu Varghese, Valentina Bonito, Martin Jurna, Jonathan Palero, Margaret Horton, Rieko Verhagen

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)
32 Downloads (Pure)

Abstract

We investigated the influence of thermal initiation pathway on the irradiance threshold for laser induced breakdown in transparent, absorbing and scattering phantoms. We observed a transition from laserinduced optical breakdown to laser-induced thermal breakdown as the absorption coefficient of the medium is increased. We found that the irradiance threshold after correction for the path length dependent absorption and scattering losses in the medium is lower due to the thermal pathway for the generation of seed electrons compared to the laser-induced optical breakdown. Furthermore, irradiance threshold gradually decreases with the increase in the absorption properties of the medium. Creating breakdown with lower irradiance threshold that is specific at the target chromophore can provide intrinsic target selectivity and improve safety and efficacy of skin treatment methods that use laser induced breakdown.

Original languageEnglish
Article numberA011
Pages (from-to)1234-1240
Number of pages7
JournalBiomedical Optics Express
Volume6
Issue number4
DOIs
Publication statusPublished - 1 Jan 2015

Fingerprint Dive into the research topics of 'Influence of absorption induced thermal initiation pathway on irradiance threshold for laser induced breakdown'. Together they form a unique fingerprint.

Cite this