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Goos-Hänchen shift for coupled vibrational modes in a semiconductor structure.

Diosdado Villegas1,2, Zorayda Lazcano2, Jesús Arriaga2

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Summary
This summary is machine-generated.

This study theoretically investigates the Goös-Hanchen shift (GHS) in semiconductor thin films. Enhanced GHS values for acoustic and optical modes suggest potential applications in acoustic device design.

Keywords:
Goos–Hänchen shiftcoupled modessemiconductor structuresvibrational waves

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Area of Science:

  • Acoustics and Optics
  • Condensed Matter Physics
  • Materials Science

Background:

  • The Goös-Hanchen shift (GHS) describes the transverse displacement of a reflected or transmitted light beam.
  • Understanding GHS in thin films is crucial for optical and acoustic device applications.
  • Semiconductor thin films offer unique properties for manipulating vibrational modes.

Purpose of the Study:

  • To theoretically investigate the Goös-Hanchen shift (GHS) for acoustic and optical vibrational modes.
  • To analyze the impact of incident angle on GHS in a semiconductor thin film.
  • To explore the coupling between longitudinal and transverse modes and its effect on GHS.

Main Methods:

  • Theoretical analysis of acoustic and optical vibrational modes.
  • Investigation of reflection and transmission from a semiconductor thin film.
  • Examination of GHS under varying incident angles and mode frequencies.

Main Results:

  • Acoustic GHS can be up to seven times the film thickness and 20 times the incident wavelength.
  • Optical GHS can exceed 30 times the incident wavelength.
  • Significant amplification of GHS is strongly influenced by incident angle and mode frequency.

Conclusions:

  • The Goös-Hanchen shift is significantly amplified in semiconductor thin films.
  • Observed GHS values highlight the potential for GHS in acoustical systems.
  • This research opens possibilities for designing advanced acoustic devices.