All-Optical Control of Vortex Lasing in Silicon-Organic Lattices

Area of Science:

• Photonics and Nanotechnology
• Materials Science
• Quantum Optics

Background:

• Silicon-organic hybrid structures offer unique optical properties.
• Bound states in the continuum (BICs) enable highly confined light modes.
• Vortex beams carry orbital angular momentum, useful for advanced optical applications.

Purpose of the Study:

• To demonstrate vortex lasing in a silicon-organic hybrid lattice.
• To achieve all-optical control over lasing emission.
• To explore the potential for active silicon topological devices.

Main Methods:

• Fabrication of an array of amorphous silicon nanodisks integrated with dye molecules.
• Utilizing pulsed optical pumping to excite the hybrid system.
• Employing a continuous-wave green laser for all-optical control via thermo-optic effects and additional gain.

Main Results:

• Successful generation of vortex lasing from bound states in the continuum.
• Demonstration of dynamic wavelength tuning by modulating the control laser intensity.
• Switching between vortex and single-lobed beam emission by manipulating the control beam's position.

Conclusions:

• The silicon-organic hybrid lattice provides a versatile platform for tunable vortex lasing.
• All-optical control is achieved through thermo-optic effects and gain modulation in the hybrid system.
• These findings open new avenues for developing active silicon-based topological photonic devices.