High-order-harmonic generation from H2+ molecular ions near plasmon-enhanced laser fields

I. Yavuz, Y. Tikman, and Z. Altun
Phys. Rev. A 92, 023413 – Published 12 August 2015

Abstract

Simulations of plasmon-enhanced high-order-harmonic generation are performed for a H2+ molecular cation near the metallic nanostructures. We employ the numerical solution of the time-dependent Schrödinger equation in reduced coordinates. We assume that the main axis of H2+ is aligned perfectly with the polarization direction of the plasmon-enhanced field. We perform systematic calculations on plasmon-enhanced harmonic generation based on an infinite-mass approximation, i.e., pausing nuclear vibrations. Our simulations show that molecular high-order-harmonic generation from plasmon-enhanced laser fields is possible. We observe the dispersion of a plateau of harmonics when the laser field is plasmon enhanced. We find that the maximum kinetic energy of the returning electron follows 4Up. We also find that when nuclear vibrations are enabled, the efficiency of the harmonics is greatly enhanced relative to that of static nuclei. However, the maximum kinetic energy 4Up is largely maintained.

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  • Received 25 June 2015

DOI:https://doi.org/10.1103/PhysRevA.92.023413

©2015 American Physical Society

Authors & Affiliations

I. Yavuz, Y. Tikman, and Z. Altun

  • Physics Department, Marmara University, 34722 Ziverbey, Istanbul, Turkey

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Vol. 92, Iss. 2 — August 2015

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