Paper 13139-9
Paper 13139-9
Femtosecond optical Kerr effect in vapors, liquids, and tissues (Keynote Presentation)
18 August 2024 • 3:40 PM - 4:15 PM PDT | Conv. Ctr. Room 11B
Abstract
Our work proposes the use of a collinear femtosecond Optical Kerr Gate for the first time to study the temporal behavior of the molecular interactions of carbon disulfide (CS2) vapor at 51kPa at room temperature in comparison to its liquid state. A faster molecular relaxation time for the vapor sample (800fs) is shown as it has less neighboring molecule interactions from collisions, while the liquids state has more collisions and interactions giving a 1.7ps relaxation time. This study also presents the OKE as a new optical biopsy method to differentiate different types of tissues. The main biomarker observed in our study is the doubling in the tissue’s conductivity from the dielectric response time, associated with the conductivity and permittivity observed in different grades of breast cancer tissues. Our finding suggests conductivity can be used as a new major biomarker for the classification or detection of diseases.
Presenter
The City Univ. of New York (United States)
Dr. Robert Alfano is a Distinguished Professor of Science and Engineering in the Physics Dept at CCNY. His research focuses on ultrafast laser science to advance knowledge and fundamental understanding in a wide scope of optical engineering and science fields, including Nonlinear Optics with the discovery of supercontinuum, self-focusing, 4 wave mixing, and XPM; Time-resolved spectroscopy–pump-probe and Ultrafast Optics. Dr. Alfano is the director of CUNY IUSL at CCNY, has published more than 750 papers, holds 135 patents, and has mentored over 59 Ph.D. students. The citation index is greater than 49,000, and Hirsh Index is 105. Dr. Alfano earned a Ph. D. from New York University; is a fellow of APS, IEEE, OSA, and NYAS. Dr. Alfano’s major awards are OSA 2008 Charlie Townes, SPIES 2011 Briton Chance Award Biomedical Optics, APS 2013 Arthur Schawlow, OSA 2016 Michael Feld Biophotonics award, and 2019 SPIE Gold Medal award.