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Spectral changes of stochastic beams scattered on a deterministic medium.

Mayukh Lahiri¹, Emil Wolf

¹Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA. mayukh@pas.rochester.edu

|June 30, 2012

Summary

Scattering polychromatic plane waves can shift spectral line frequencies even in deterministic media, challenging prior assumptions. This scattering phenomenon offers a new method for analyzing the structure of deterministic mediums.

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Area of Science:

Optics and Photonics
Wave Scattering Phenomena
Materials Science

Background:

Scattering of polychromatic plane waves by random media is known to cause spectral line frequency shifts.
A common scientific perception is that random variations in a medium's refractive index are necessary for scattering-induced spectral shifts.
Previous studies have primarily focused on random media for observing these frequency shifts.

Purpose of the Study:

To investigate whether spectral line frequency shifts can occur during wave scattering in deterministic media.
To challenge the established notion that only random media can produce such scattering phenomena.
To explore the potential of using scattering-induced spectral shifts for characterizing deterministic medium structures.

Main Methods:

Theoretical analysis of polychromatic plane wave scattering.
Modeling wave propagation through media with deterministic variations in refractive index.
Investigating the relationship between medium structure and spectral shifts.

Main Results:

Demonstrated that frequency shifts of spectral lines can be generated by scattering even in deterministic media.
Showcased that the phenomenon is not exclusive to random media as previously believed.
Established a correlation between the deterministic structure of the medium and the observed spectral shifts.

Conclusions:

The scattering of polychromatic plane waves can induce spectral shifts in deterministic media.
This finding broadens the understanding of wave-matter interactions beyond random media.
The phenomenon provides a novel approach for probing and understanding the structural properties of deterministic materials.