Accession Number : ADA575018


Title :   Substrate Independence of THz Vibrational Modes of Polycrystalline Thin Films of Molecular Solids in Waveguide THz-TDS


Descriptive Note : Journal article


Corporate Author : OKLAHOMA STATE UNIV STILLWATER SCHOOL OF ELECTRICAL AND COMPUTER ENGINEERING


Personal Author(s) : Harsha, S S ; Melinger, Joseph S ; Qadri, S B ; Grischkowsky, D


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a575018.pdf


Report Date : Jan 2012


Pagination or Media Count : 8


Abstract : The influence of the metal substrate on the measurement of high resolution THz vibrational modes of molecular solids with the waveguide THz-TDS technique is investigated. The sample film of salicylic acid is studied using waveguide THz-TDS on three different metal substrates and two-surface passivated substrates. The independence of the observed THz vibrational modes to the metal substrate is demonstrated. Independently, surface passivation is presented as a viable experimental addition to the waveguide THz-TDS technique to aid the characterization of samples with known reactivity to metal surfaces.


Descriptors :   *POLYCRYSTALLINE , *SUBSTRATES , *THIN FILMS , *VIBRATION , *WAVEGUIDES , BROADBAND , CRYSTALLOGRAPHY , HIGH RESOLUTION , METALS , SALICYLIC ACIDS , SPECTROSCOPY


Subject Categories : Crystallography
      Solid State Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE