A time-resolved Raman study of inhomogeneous dephasing in high-pressure molecular crystals

✍ Scribed by Robert A. Crowell; Eric L. Chronister

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 651 KB
• Volume: 195
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(92)85570-z

✦ Synopsis

Time-resolved coherent Raman measurements at low temperature are performed on strain-free crystals at high pressure and on highly strained crystals following a pressure release. Results for several Raman modes of naphthalene and carbon disulfide are analyzed in terms of a competition between vibrational relaxation and inhomogeneous dephasing. Changes in vibrational dephasing induced by a large negative pressure change ( -APp, 5 kbar) are used to determine the magnitude of inhomogeneous dephasing effects. The vibrational dephasing for molecular crystals grown at high pressure in a diamond anvil cell is found to be homogeneous, whereas strain-induced inhomogeneous dephasing is found to be vibrational mode specific.