Vibrational Two-Photon Emission from Coherently Excited Solid Parahydrogen

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2 Citations (Scopus)

Abstract

We report the observation of two-photon emission from a coherently excited vibrational state of solid parahydrogen, which is also a known quantum solid. Coherence between the ground and the excited states is prepared by stimulated Raman scattering using two visible laser pulses. The two-photon emission is triggered by another mid-infrared laser pulse. It was observed that the two-photon emission persists even when the trigger pulse is injected long after the excitation. This is due to the long decoherence time of the vibrational states of solid parahydrogen. It is found that the emission intensity increases even after the excitation pulses pass through the target completely. This coherence development is highly suppressed at high target temperatures and high residual orthohydrogen concentrations. Effects of target annealing and laser-induced damage on the target are also observed.

Original languageEnglish
Pages (from-to)3943-3951
Number of pages9
JournalJournal of Physical Chemistry A
Volume121
Issue number20
DOIs
Publication statusPublished - May 25 2017

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Laser pulses
Photons
photons
pulses
vibrational states
Stimulated Raman scattering
Laser damage
Infrared lasers
excitation
Excited states
infrared lasers
Annealing
lasers
actuators
Raman spectra
damage
annealing
Temperature
temperature

Keywords

  • pH2

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

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title = "Vibrational Two-Photon Emission from Coherently Excited Solid Parahydrogen",
abstract = "We report the observation of two-photon emission from a coherently excited vibrational state of solid parahydrogen, which is also a known quantum solid. Coherence between the ground and the excited states is prepared by stimulated Raman scattering using two visible laser pulses. The two-photon emission is triggered by another mid-infrared laser pulse. It was observed that the two-photon emission persists even when the trigger pulse is injected long after the excitation. This is due to the long decoherence time of the vibrational states of solid parahydrogen. It is found that the emission intensity increases even after the excitation pulses pass through the target completely. This coherence development is highly suppressed at high target temperatures and high residual orthohydrogen concentrations. Effects of target annealing and laser-induced damage on the target are also observed.",
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author = "Yuki Miyamoto and Hideaki Hara and Takahiko Masuda and Noboru Sasao and Satoshi Uetake and Akihiro Yoshimi and Koji Yoshimura and Motohiko Yoshimura",
year = "2017",
month = "5",
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language = "English",
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journal = "Journal of Physical Chemistry A",
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publisher = "American Chemical Society",
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TY - JOUR

T1 - Vibrational Two-Photon Emission from Coherently Excited Solid Parahydrogen

AU - Miyamoto, Yuki

AU - Hara, Hideaki

AU - Masuda, Takahiko

AU - Sasao, Noboru

AU - Uetake, Satoshi

AU - Yoshimi, Akihiro

AU - Yoshimura, Koji

AU - Yoshimura, Motohiko

PY - 2017/5/25

Y1 - 2017/5/25

N2 - We report the observation of two-photon emission from a coherently excited vibrational state of solid parahydrogen, which is also a known quantum solid. Coherence between the ground and the excited states is prepared by stimulated Raman scattering using two visible laser pulses. The two-photon emission is triggered by another mid-infrared laser pulse. It was observed that the two-photon emission persists even when the trigger pulse is injected long after the excitation. This is due to the long decoherence time of the vibrational states of solid parahydrogen. It is found that the emission intensity increases even after the excitation pulses pass through the target completely. This coherence development is highly suppressed at high target temperatures and high residual orthohydrogen concentrations. Effects of target annealing and laser-induced damage on the target are also observed.

AB - We report the observation of two-photon emission from a coherently excited vibrational state of solid parahydrogen, which is also a known quantum solid. Coherence between the ground and the excited states is prepared by stimulated Raman scattering using two visible laser pulses. The two-photon emission is triggered by another mid-infrared laser pulse. It was observed that the two-photon emission persists even when the trigger pulse is injected long after the excitation. This is due to the long decoherence time of the vibrational states of solid parahydrogen. It is found that the emission intensity increases even after the excitation pulses pass through the target completely. This coherence development is highly suppressed at high target temperatures and high residual orthohydrogen concentrations. Effects of target annealing and laser-induced damage on the target are also observed.

KW - pH2

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U2 - 10.1021/acs.jpca.7b02011

DO - 10.1021/acs.jpca.7b02011

M3 - Article

VL - 121

SP - 3943

EP - 3951

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

SN - 1089-5639

IS - 20

ER -