Coherent phonon spectroscopy of non-fully symmetric modes using resonant terahertz excitation

Journal Article · Mon Aug 31 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4930021· OSTI ID:22489185

Huber, L.; Johnson, S. L. ^[1]; Ranke, M. ^[2]; Ferrer, A. ^[1]

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1. Institute for Quantum Electronics, Physics Department, ETH Zurich, CH-8093 Zurich (Switzerland)
2. The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg (Germany)

We use intense terahertz (THz) frequency electromagnetic pulses generated via optical rectification in an organic crystal to drive vibrational lattice modes in single crystal Tellurium. The coherent modes are detected by measuring the polarization changes of femtosecond laser pulses reflecting from the sample surface, resulting in a phase-resolved detection of the coherent lattice motion. We compare the data to a model of Lorentz oscillators driven by the near-single-cycle broadband THz pulse. The demonstrated technique of optically probed coherent phonon spectroscopy with THz frequency excitation could prove to be a viable alternative to other time-resolved spectroscopic methods like standard THz time domain spectroscopy.

• OSTI ID: 22489185
• Journal Information: Applied Physics Letters, Vol. 107, Issue 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DETECTION
ELECTROMAGNETIC PULSES
EXCITATION
LASERS
MONOCRYSTALS
OSCILLATORS
PHONONS
POLARIZATION
SPECTROSCOPY
SURFACES
SYMMETRY
TELLURIUM
TIME RESOLUTION