Aperiodic photonic quantum-well structures for multiple channeled filtering at arbitrary preassigned frequencies

Area of Science:

• Photonics and Materials Science
• Quantum Optics and Nanophotonics

Background:

• Photonic crystals (PCs) offer unique light manipulation properties.
• Achieving multiple, precisely controlled filtering frequencies in photonic structures remains a challenge.

Purpose of the Study:

• To design aperiodic photonic quantum-well (APQW) structures capable of multi-channel filtering at user-defined frequencies.
• To explore the use of simulated annealing for optimizing APQW designs.

Main Methods:

• Utilized simulated annealing algorithm with a specialized merit function for structure design.
• Developed APQW structures comprising aperiodically stacked dielectric layers between finite-length prototype photonic crystals.
• Investigated the generation of defect states within the APQW structures.

Main Results:

• Successfully designed APQW structures capable of generating specific defect states at predetermined frequencies.
• Demonstrated the ability to achieve multiple channeled filtering at arbitrary preassigned frequencies.
• Numerical simulations confirmed that the designed APQWs meet the specified performance criteria.

Conclusions:

• Aperiodic photonic quantum-well structures are effective for multi-channel optical filtering.
• Simulated annealing is a viable method for designing complex photonic structures with precise frequency control.
• The proposed APQW design offers a pathway to advanced optical filtering applications.