SNAP microwave optical filters

TL;DR

This paper proposes a novel design for microwave photonic tunable filters using SNAP microresonators, leveraging quantum well modulation effects to achieve high performance and tunability.

Contribution

It introduces a new approach to microwave filter design by applying quantum well modulation principles to SNAP microresonators, enhancing filter performance.

Findings

Eigenvalues form denser groups with wider gaps after modulation.

The proposed filters demonstrate high tunability and performance.

The method enables precise control over microwave photonic filtering.

Abstract

If the originally flat bottom of a wide quantum well with multiple eigenstates is periodically modulated, its eigenvalues rearrange into denser groups separated by wider gaps. We show that this effect, if implemented in an elongated bottle microresonator (also called a SNAP microresonator) allows to design microwave photonic tunable filters with an outstanding performance.