Optical microcavities formed by semiconductor microtubes using a bottlelike geometry

Area of Science:

• Photonics and optical engineering.
• Resonant optical cavities.
• Wave propagation in structured media.

Background:

• Optical microcavities are crucial for various photonic applications.
• Designing microcavities with specific optical properties remains a challenge.
• Microtube resonators offer unique geometrical possibilities for light confinement.

Purpose of the Study:

• To realize and characterize optical microtube resonators with a bottlelike geometry.
• To develop a theoretical model for describing the optical modes within these resonators.
• To demonstrate the ability to tailor resonator geometry for desired optical properties.

Main Methods:

• Fabrication of optical microtube resonators with bottlelike shapes.
• Experimental measurement of eigenenergies and axial field distributions.
• Development and application of a theoretical model based on adiabatic separation of propagation.
• Utilizing a photonic quasi-Schrödinger equation with a geometry-dependent quasipotential.

Main Results:

• Successful realization of optical microtube resonators with bottlelike geometry.
• The measured optical properties are accurately described by the developed theoretical model.
• A precise and simple method for determining the quasipotential from the microtube geometry was established.
• Demonstrated tunability of mode distributions and dispersion relations by altering resonator geometry.

Conclusions:

• Bottlelike microtube resonators offer a versatile platform for controlling optical modes.
• The theoretical model provides an intuitive and accurate description of resonator behavior.
• Geometric tailoring of microtube resonators enables precise engineering of photonic properties.
• This work advances the design and application of novel optical microcavities.