Dynamic self-pumped phase-conjugating mirror based on the bacteriorhodopsin variant D96N

Area of Science:

• Optics and Photonics
• Biophotonics
• Materials Science

Background:

• Phase-conjugating mirrors are crucial for optical wave-front correction.
• Bacteriorhodopsin offers unique photoactive properties for optical devices.
• Developing efficient and stable phase-conjugating materials remains an active research area.

Purpose of the Study:

• To develop and characterize a self-pumped phase-conjugating mirror utilizing the bacteriorhodopsin D96N variant.
• To evaluate the performance metrics including reflectivity, response time, and angular stability.
• To demonstrate wave-front restoration capabilities using this novel optical device.

Main Methods:

• Fabrication of a 17 mm diameter self-pumped phase-conjugating mirror with bacteriorhodopsin D96N.
• Optical measurements of resonant reflectivity at 647 nm and response times at 532 nm.
• Demonstration of wave-front restoration using spatial light modulators and analysis of reflectivity dependence on intensity and polarization.

Main Results:

• Achieved resonant reflectivities up to 30% at 25 mW/cm(2) (647 nm).
• Observed rise times below 1 ms at 500 mW/cm(2) (532 nm).
• Demonstrated effective wave-front restoration and analyzed reflectivity behavior, showing high angular stability due to high-resolution bacteriorhodopsin films.

Conclusions:

• The bacteriorhodopsin D96N based self-pumped phase-conjugating mirror is a high-performance optical device.
• The mirror exhibits excellent reflectivity, fast response, and robust wave-front correction capabilities.
• Its high resolution ensures stable performance even with varying pump-signal beam angles, paving the way for advanced optical systems.