Raman Spectroscopy At Very High Pressures

Shiv K. Sharma

doi:10.1117/12.951578

5 July 1989 Raman Spectroscopy At Very High Pressures

Shiv K. Sharma

Proceedings Volume 1055, Raman Scattering, Luminescence and Spectroscopic Instrumentation in Technology; (1989) https://doi.org/10.1117/12.951578
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

In this review article technical aspects of high-pressure Raman spectroscopy are discussed. With the advancements-in the diamond anvil cell (DAC) technology and spectroscopic instrumentation, high-pressure Raman spectroscopy has made tremendous advances. It has become possible to study vibrational spectra of micron size (~5μ) samples of solids, liquids and gases to very high pressures--approaching the megabar range--in the 0°, 90°, 135° and 180° scattering geometries. The advantages and problems of Raman measurements in various scattering geometries in the DAC are examined by comparing: (i) the high-pressure spectra of normal deuterium (n-D2) fluid in 0° and 90° scattering geometries, and (ii) micro-Raman spectra of diamond anvils at high pressures in 135° and 180° scattering geometries. It is found that the 90° and 135° scattering modes of high-pressure Raman measurements in the DAC provide better signal-to-noise ratio and less interference from diamond-anvil fluorescence. In addition, the results of high-pressure Raman measurements of Ge02 and Si02 glasses and of crystalline polymorphs of a number of materials, including Ge02, Si02, and TiO2 are summarized.

Citation Download Citation

Shiv K. Sharma "Raman Spectroscopy At Very High Pressures", Proc. SPIE 1055, Raman Scattering, Luminescence and Spectroscopic Instrumentation in Technology, (5 July 1989); https://doi.org/10.1117/12.951578

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available