9 March 2016 Effects of polarization and absorption on laser induced optical breakdown threshold for skin rejuvenation
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Abstract
Laser induced optical breakdown (LIOB) is a non-linear absorption process leading to plasma formation at locations where the threshold irradiance for breakdown is surpassed. In this paper we experimentally demonstrate the influence of polarization and absorption on laser induced breakdown threshold in transparent, absorbing and scattering phantoms made from water suspensions of polystyrene microspheres. We demonstrate that radially polarized light yields a lower irradiance threshold for creating optical breakdown compared to linearly polarized light. We also demonstrate that the thermal initiation pathway used for generating seed electrons results in a lower irradiance threshold compared to multiphoton initiation pathway used for optical breakdown.
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Babu Varghese, Valentina Bonito, Simona Turco, Rieko Verhagen, "Effects of polarization and absorption on laser induced optical breakdown threshold for skin rejuvenation", Proc. SPIE 9740, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVI, 97400I (9 March 2016); doi: 10.1117/12.2232894; https://doi.org/10.1117/12.2232894
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