Plasma-based polarizer and waveplate at large laser intensity

Area of Science:

• Plasma physics
• Photonics
• Laser-plasma interactions

Background:

• Plasma photonic crystals utilize plasma density gratings created by counterpropagating laser beams.
• Previous research focused on s-wave (TE mode) laser pulse interactions.

Purpose of the Study:

• Investigate the interaction of p-wave (TM mode) laser pulses with plasma photonic crystals.
• Determine if polarization affects the transmission and reflection properties of these crystals.
• Explore potential applications as polarizers and waveplates for high-intensity lasers.

Main Methods:

• Experimental investigation of plasma photonic crystal response to s-wave and p-wave laser pulses.
• Development of a simple analytic model for predicting crystal behavior.
• Analysis of transmission and reflection characteristics across different polarizations.

Main Results:

• Plasma photonic crystal properties are dependent on laser pulse polarization (s-wave vs. p-wave).
• The crystal can act as a plasma polarizer for high-intensity laser pulses in specific regimes.
• Differences in phase velocities for s and p polarizations at grazing incidence were observed.

Conclusions:

• Plasma photonic crystals offer polarization-sensitive control of high-power laser pulses.
• These crystals can function as effective polarizers and waveplates, transforming laser light polarization.
• The demonstrated capabilities extend to laser intensities exceeding the damage thresholds of conventional solid-state optics.