Modulation in statistical properties of electromagnetic beam using surface plasmon polaritons

Area of Science:

• Optics and Photonics
• Electromagnetism
• Materials Science

Background:

• Surface plasmon polaritons (SPPs) are collective oscillations of electrons at a metal-dielectric interface.
• SPPs can strongly interact with and modify electromagnetic fields.
• Controlling light's coherence and polarization is crucial for advanced optical applications.

Purpose of the Study:

• To investigate how surface plasmons affect the statistical properties of electromagnetic beams.
• To derive mathematical expressions for coherence and polarization changes induced by SPPs.
• To explore the potential of subwavelength structures for manipulating beam properties.

Main Methods:

• Derivation of mathematical expressions for polarization and coherence.
• Analysis of electromagnetic beam properties in a double-slit experiment.
• Simulation and theoretical modeling of SPP-enhanced beams.

Main Results:

• Surface plasmons modulate the degree of polarization, Stokes parameters, and degree of coherence.
• The amplitude and period of modulation are controllable via subwavelength structure design.
• Incident field at a single slit shows altered output beam properties with enhanced SPP strength.

Conclusions:

• SPPs offer a powerful mechanism to tailor the coherence and polarization of electromagnetic beams.
• Subwavelength structures can be engineered to precisely control these optical attributes.
• This research enables the development of new optical systems for manipulating light at the subwavelength scale.