Wavelength scaling of high-order-harmonic-generation efficiency by few-cycle laser pulses: Influence of carrier-envelope phase


Yavuz I. , Altun Z. , Topcu T.

PHYSICAL REVIEW A, cilt.86, sa.4, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 86 Konu: 4
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1103/physreva.86.043836
  • Dergi Adı: PHYSICAL REVIEW A

Özet

We investigate the wavelength scaling of high-order-harmonic-generation (HHG) efficiency by few-cycle laser pulses where the influence of the carrier-envelope phase (CEP) becomes prominent. Based on the numerical solution of time-dependent Schrodinger equation, in the infrared region of lambda (0.8-1.8 mu m), we observe that the power law of the form lambda (x) (x approximate to 5-6) is still present; but for constant intensity and a fixed energy interval, it differs markedly in the CEP. We find that for a specific value of CEP the wavelength dependence follows a lambda(-4.6) scaling in high-harmonic yield. We also perform classical trajectory calculations to gain some understanding of the CEP dependence of the wavelength scaling.