Self-evolving photonic crystals for ultrafast photonics.

Area of Science:

• Optics and Photonics
• Materials Science
• Semiconductor Physics

Background:

• Ultrafast dynamics in nanophotonic materials are crucial for fundamental science and photonic device applications.
• Controlling high optical power is challenging due to significant energy requirements for external stimuli like optical pumping or voltage application.

Purpose of the Study:

• To introduce and demonstrate the concept of a self-evolving photonic crystal.
• To overcome the limitations of external stimuli for controlling nanophotonic dynamics.

Main Methods:

• Demonstrated a self-evolving photonic crystal concept utilizing carrier-photon interactions.
• Employed continuous uniform current injection to dynamically alter the photonic band's spatial profile.
• Experimentally validated the concept using a GaAs-based photonic crystal.

Main Results:

• Achieved short-pulse generation with a high peak power of 80 W.
• Generated pulses with a pulse width of less than 30 picoseconds.
• Confirmed dynamic spatial profile changes in the photonic band through carrier-photon interactions.

Conclusions:

• The self-evolving carrier-photon dynamics expand the potential of nanophotonic materials.
• This approach opens avenues for novel scientific and industrial applications in photonics.