Pump pulse duration dependence of coherent phonon amplitudes in antimony

Misochko, O.
August 2016
Journal of Experimental & Theoretical Physics;Aug2016, Vol. 123 Issue 2, p292
Academic Journal
Coherent optical phonons of A and E symmetry in antimony have been studied using the femtosecond pump-probe technique. By varying the pump-pulse duration and keeping the probe duration constant, it was shown that the amplitude of coherent phonons of both symmetries exponentially decreases with increasing pulse width. It was found that the amplitude decay rate for the fully symmetric phonons with larger frequency is greater than that of the doubly degenerate phonons, whereas the frequency and lifetime for coherent phonons of both symmetries do not depend on the pump-pulse duration. Based on this data, the possibility of separation between dynamic and kinematic contributions to the generation mechanism of coherent phonons is discussed.


Related Articles

  • Symmetries of history quantum theories and decoherence functionals.  // Journal of Mathematical Physics;Nov98, Vol. 39 Issue 11, p5850 

    Investigates the symmetries in the context of history quantum theories. Characterization of the symmetries of single decoherence functionals; Correspondence of the physical symmetries of history quantum theory and operators; Validity of the Schreckenberg theorem on physical symmetries.

  • Telefonica (Vivo), Ciena launch Brazil's first 100G network.  // Fiber Optics Weekly Update;3/1/2013, Vol. 33 Issue 9, p11 

    The article reports on a collaboration between Brazilian telecommunications company Telefonica and Ciena Corp. to deploy the latter's coherent optical technology to meet the carrier's future bandwidth growth.

  • Parity Symmetry and Parity Breaking in the Super-Ohmic Spin-Boson Model. Wang, Qiong; He, Zhi; Yao, Chun-Mei // International Journal of Theoretical Physics;Jun2015, Vol. 54 Issue 6, p1798 

    The parity symmetry and parity breaking in the super-Ohmic spin-boson model (SBM) is studied by using the coherent-state approach. We show that the parity symmetry is broken as well as the scaling behavior of the ground state by introducing a bias, and then it can be restored by involving an...

  • Coherent Perfect Absorption in í“Ÿí“£ Symmetric Optical Lattice. Sinha, Anjana; Roychoudhury, Rajkumar // International Journal of Theoretical Physics;Nov2015, Vol. 54 Issue 11, p3991 

    In this work we study scattering in a í“Ÿí“£ symmetric periodic optical lattice, when two coherent beams are incident on it from two opposite directions. We focus our attention on both í“Ÿí“£ broken as well as í“Ÿí“£ unbroken phase, with special emphasis on spectral...

  • Quaternionic vector coherent states and the supersymmetric harmonic oscillator. Thirulogasanthar, K.; Krzyżak, A.; Katatbeh, Q. // Theoretical & Mathematical Physics;Oct2006, Vol. 149 Issue 1, p1366 

    The quaternionic vector coherent states are realized as coherent states of the supersymmetric harmonic oscillator with broken symmetry in analogy with the standard canonical coherent states of the ordinary harmonic oscillator. We study the nonclassical properties of the oscillator, such as the...

  • SEGMENTATION ANALYSIS OF OPTICAL COHERENT TOMOGRAPHY IMAGE BY STATISTICAL METHODS. G., Mohandass; Natarajan, R. Ananda // Indian Streams Research Journal;Oct2013, Vol. 3 Issue 9, p1 

    Optical coherent tomography image is an effective and efficient in diagnosis procedure in the retina. The challenge in OCT image is to detect retinal layers. Here, detection process in retina layers is a primary objective, such that, different existing segmentation methods is studied and...

  • Spherically Symmetric Solutions of Light Galileon. Momeni, D.; Houndjo, M.; Güdekli, E.; Rodrigues, M.; Alvarenga, F.; Myrzakulov, R. // International Journal of Theoretical Physics;Feb2016, Vol. 55 Issue 2, p1211 

    We have been studied the model of light Galileon with translational shift symmetry ϕ → ϕ + c. The matter Lagrangian is presented in the form $\mathcal {L}_{\phi }= -\eta (\partial \phi )^{2}+\beta G^{\mu \nu }\partial _{\mu }\phi \partial _{\nu }\phi $. We have been addressed two...

  • Dephasing caused by the Thin Spectrum in a BCS Superconductor. van Wezel, Jasper; van den Brink, Jeroen // AIP Conference Proceedings;2007, Vol. 918 Issue 1, p332 

    Recently we have shown that the thin spectrum associated with the process of spontaneous symmetry breaking will lead to a maximum coherence time for many-particle solid state qubits. In this paper we will discuss how the general mechanism of dephasing caused by a thin spectrum can be applied to...

  • Quantum Physics with Neutrons: From Spinor Symmetry to Kochen-Specker Phenomena. Rauch, Helmut // Foundations of Physics;Jan2012, Vol. 42 Issue 1, p153 

    In 1974 perfect crystal interferometry has been developed and immediately afterwards the 4 π-symmetry of spinor wave-functions has been verified. The new method opened a new access to the observation of intrinsic quantum phenomena. Spin-superposition, quantum state reconstruction and quantum...

  • Decoherence and entanglement degradation of a qubit-qutrit system in non-inertial frames. Ramzan, M.; Khan, M. // Quantum Information Processing;Apr2012, Vol. 11 Issue 2, p443 

    We study the effect of decoherence on a qubit-qutrit system under the influence of global, local and multilocal decoherence in non-inertial frames. We show that the entanglement sudden death can be avoided in non-inertial frames in the presence of amplitude damping, depolarizing and phase...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics