Modeling interaction of ultrashort pulses with ENZ materials

Elloh C., Edah G., Ayela A., Biswas A., EKİCİ M., Alzahrani A. K., ...Daha Fazla

CHINESE JOURNAL OF PHYSICS, cilt.71, ss.492-505, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 71
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.cjph.2021.03.023
  • Dergi Adı: CHINESE JOURNAL OF PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC, zbMATH
  • Sayfa Sayıları: ss.492-505
  • Anahtar Kelimeler: ENZ-materials, Self-phase modulation, Self-steepening, Absorption, Gain-bandwidth, Dispersion, INDIUM TIN OXIDE, 2ND-HARMONIC GENERATION, NONLINEARITY, DISPERSION, DYNAMICS
  • Yozgat Bozok Üniversitesi Adresli: Evet

Özet

In this work, the split-step Fourier method for beam propagation is used to investigate the interaction of ultra-short pulses with epsilon-near-zero materials. The propagation of pulses is governed by the nonlinear Schro center dot dinger equation (NLSE) containing dispersion, gain-bandwidth, self-phase modulation, self-steepening, and absorption parameters. It is found that the intensity profile of the pulse is broadened and the phase of the pulse is shifted by dispersion phenomena. The gain/loss related to the imaginary part of the refractive index causes an increase or decrease in intensity and pulse edge effects. These effects do not favor the steady propagation of the pulse. The self-phase modulation is not noted to appreciably affect the intensity pulse profile. The selfsteepening modifies the phase and energy of the pulse during propagation, as well as absorption, which influences the losses by both the linear and nonlinear effects.