C.V. Raman and the Impact of Raman Effect in Quantum Physics, Condensed Matter, and Materials Science

Anant K. Ramdas 

Purue University, Department of Physics, 525 Northwestern Avenue, West Lafayette 47907-2036, United States

Abstract

Raman’s momentous discovery in 1928 that the spectral analysis of the light scattered by matter, illuminated with monochromatic light of frequency ω L, reveals new signatures at (ω L ± ω i) , ω i’s being the internal frequencies of the matter [Nature 121, 501 (1928); Indian Journal of Physics 2, 387 (1928)]. In a cable to Nature [ 122, 349 (1928)], R.W. Wood, the renowned American Physicist, hailed it as a “very beautiful discovery, which resulted from Ramans’s long and patient study of the phenomenon of light scattering” and underscored its significance as “one of the most convincing proofs of the quantum theory of light we have at present time”.
After a brief account of Raman’s extraordinary scientific career, I will recount the profound impact made by Raman effect, which launched a new branch of spectroscopy, with two illustrative examples: (1) Rotational Raman Spectra of homonuclear diatonic gases and Bose-Einstein & Fermi-Dirac Statistics and (2) The parity related rule of mutual exclusion in the Raman vs infrared activity of vibrational modes of centro-symmetric matter.
The dramatic change and the vastly expanded scope of Raman spectroscopy brought about by the invention of the Laser in 1960 will be illustrated with select examples from Condensed Matter Physics and Materials Science. In particular, the focus will be on the collective and localized vibrational, electronic, and magnetic excitations in semiconductors and their nanostructures.

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: http://science24.com/paper/17258 must be provided.

 

Related papers
  1. CVT of Chalcopyrite Semiconductors

Presentation: Invited oral at E-MRS Fall Meeting 2008, Plenary session, by Anant K. Ramdas
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-07-21 13:27
Revised:   2009-06-07 00:48
Google
 
Web science24.com
© 1998-2022 pielaszek research, all rights reserved Powered by the Conference Engine