POLARIZATION ABSORPTION SPECTROSCOPY: DETERMINATION OF THE DIRECTION AND DEGREE OF ORIENTATION OF ABSORPTION TRANSITIONS.

J. M. DANIELS, P. E. CLADIS, P. L. FINN, Linda S Powers, J. C. SMITH, R. W. FILAS, J. W. GOODBY, T. M. LESLIE

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

IN AN ORDERED, DIRECTIONAL MEDIUM, SUCH AS LIQUID CRYSTALS OR BIOLOGICAL MEMBRANES, IT IS OFTEN DESIRABLE TO DETERMINE BOTH THE DEGREE OF ORDERING (I. E. , ORDER PARAMETERS) AND THE DIRECTIONS IN SPACE WHICH MOST APTLY CHARACTERIZE IT. A METHOD IS PRESENTED FOR DETERMINING THESE QUANTITIES RELATIVETO A LABORATORY FRAME WHICH CONSISTS IN MEASURING CHANGES IN THE LIGHT ABSORBED BY A PLEOCHROIC DYE DISSOLVED IN DILUTEQUANTITY IN A DIRECTIONALLY ORDERED MEDIUM AS FUNCTIONS OF POLARIZATION AND ANGLES OF INCIDENCE. THE RESULTS OF TESTINGTHIS METHOD ON A MODEL SYSTEM OF DILUTE MIXTURES OF DYES INA ROOM TEMPERATURE NEMATIC LIQUID CRYSTAL ARE PRESENTED. INPRINCIPLE, ONLY SIX SUCH MEASUREMENTS ARE NECESSARY TO MAKETHESE DETERMINATIONS; HOWEVER, SOME REDUNDANCY IS DESIRABLETO OBTAIN SUFFICIENTLY ACCURATE RESULTS.

Original languageEnglish (US)
Pages (from-to)6127-6136
Number of pages10
JournalJournal of Applied Physics
VolumeV 53
Issue numberN 9
Publication statusPublished - Sep 1982
Externally publishedYes

    Fingerprint

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

DANIELS, J. M., CLADIS, P. E., FINN, P. L., Powers, L. S., SMITH, J. C., FILAS, R. W., ... LESLIE, T. M. (1982). POLARIZATION ABSORPTION SPECTROSCOPY: DETERMINATION OF THE DIRECTION AND DEGREE OF ORIENTATION OF ABSORPTION TRANSITIONS. Journal of Applied Physics, V 53(N 9), 6127-6136.