Femtosecond optical Kerr effect in vapors, liquids, and tissues

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.