title: Broadband absorption spectroscopy via excitation of lossy resonance modes in thin films.
abstract: It is shown that broadband absorption spectroscopy utilizing thin lossy film configurations can be optimally facilitated when applied to metallic and insulating materials. For metallic films, the zero-order highly lossy resonance mode, characterized by ultra wideband absorption behavior under normal incidence, can be shifted, under parallel-polarization oblique incidence, toward a narrow band light-wavelength surface plasmon resonance condition. Higher order low-loss modes, however, occur in thin insulating films, exhibiting Debye relaxation behavior, typical for many aqueous solutions and biological substances. They can be excited in a highly scalable and sensitive manner in various frequency bands, between light and radio frequencies.
authors.affiliation: Department of Biomedical Engineering, Technion--Israel Institute of Technology, Haifa 32000, Israel. danir@tx.technion.ac.il
authors.forename: D
authors.initials: D
authors.lastname: Razansky
authors.forename: P D
authors.initials: PD
authors.lastname: Einziger
authors.forename: D R
authors.initials: DR
authors.lastname: Adam