Picosecond vibrational cooling in mixed molecular crystals studied with a new coherent raman scattering technique

Ta Chau Chang; Dana D. Dlott

doi:10.1016/0009-2614(88)80216-1

Picosecond vibrational cooling in mixed molecular crystals studied with a new coherent raman scattering technique

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Abstract

We demonstrate the pump-induced coherent Stokes Raman scattering (CSRS) technique by measuring vibrational cooling in low temperature crystals of pentacene in naphthalene following excitation of a vibration 747 cm^-1 above the S₁ origin. Using picosecond photon echoes and a two-color pump-probe technique, we find that the initial state decays in 33 ps, and reappears at the origin 25 ps later. We show that pump-induced CSRS simultaneously measures the decay from the initial state and reappearance at the origin. This technique has many of the advantages of conventional coherent Raman (e.g. intense coherent signals), but is a direct measure of the population dynamics in the initial and final states.

Original language	English (US)
Pages (from-to)	18-24
Number of pages	7
Journal	Chemical Physics Letters
Volume	147
Issue number	1
DOIs	https://doi.org/10.1016/0009-2614(88)80216-1
State	Published - May 27 1988

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Picosecond vibrational cooling in mixed molecular crystals studied with a new coherent raman scattering technique",

abstract = "We demonstrate the pump-induced coherent Stokes Raman scattering (CSRS) technique by measuring vibrational cooling in low temperature crystals of pentacene in naphthalene following excitation of a vibration 747 cm-1 above the S1 origin. Using picosecond photon echoes and a two-color pump-probe technique, we find that the initial state decays in 33 ps, and reappears at the origin 25 ps later. We show that pump-induced CSRS simultaneously measures the decay from the initial state and reappearance at the origin. This technique has many of the advantages of conventional coherent Raman (e.g. intense coherent signals), but is a direct measure of the population dynamics in the initial and final states.",

author = "Chang, {Ta Chau} and Dlott, {Dana D.}",

note = "Funding Information: * Research supported entirely by the National Science Foundation, Division of Materials Research, Solid State Chemistry program through grant NSF DMR 84-15070. I To whom correspondence should be addressed. 2 On leave until June 1,1988 at Department of Chemistry, Stanford University, Stanford, CA 94305, USA.",

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T1 - Picosecond vibrational cooling in mixed molecular crystals studied with a new coherent raman scattering technique

AU - Chang, Ta Chau

AU - Dlott, Dana D.

N1 - Funding Information: * Research supported entirely by the National Science Foundation, Division of Materials Research, Solid State Chemistry program through grant NSF DMR 84-15070. I To whom correspondence should be addressed. 2 On leave until June 1,1988 at Department of Chemistry, Stanford University, Stanford, CA 94305, USA.

PY - 1988/5/27

Y1 - 1988/5/27

N2 - We demonstrate the pump-induced coherent Stokes Raman scattering (CSRS) technique by measuring vibrational cooling in low temperature crystals of pentacene in naphthalene following excitation of a vibration 747 cm-1 above the S1 origin. Using picosecond photon echoes and a two-color pump-probe technique, we find that the initial state decays in 33 ps, and reappears at the origin 25 ps later. We show that pump-induced CSRS simultaneously measures the decay from the initial state and reappearance at the origin. This technique has many of the advantages of conventional coherent Raman (e.g. intense coherent signals), but is a direct measure of the population dynamics in the initial and final states.

AB - We demonstrate the pump-induced coherent Stokes Raman scattering (CSRS) technique by measuring vibrational cooling in low temperature crystals of pentacene in naphthalene following excitation of a vibration 747 cm-1 above the S1 origin. Using picosecond photon echoes and a two-color pump-probe technique, we find that the initial state decays in 33 ps, and reappears at the origin 25 ps later. We show that pump-induced CSRS simultaneously measures the decay from the initial state and reappearance at the origin. This technique has many of the advantages of conventional coherent Raman (e.g. intense coherent signals), but is a direct measure of the population dynamics in the initial and final states.

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Picosecond vibrational cooling in mixed molecular crystals studied with a new coherent raman scattering technique

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