# Microelectromechanical-System-Based Design of a High-Finesse Fiber Cavity Integrated with an Ion Trap

## TL;DR

This paper presents a numerical study of a MEMS-based fiber cavity integrated with an ion trap, demonstrating mechanical stability, controllable fiber positioning, and feasible ion-cavity coupling for quantum information applications.

## Contribution

It introduces a novel MEMS-based design for an integrated fiber cavity and ion trap system with demonstrated mechanical stability and controllable positioning.

## Key findings

- Actuators provide stable support with >10 μm stroke
- Mechanical resonance frequencies are on the order of kHz
- Strong ion-cavity coupling is feasible with the design

## Abstract

We present a numerical study of a MEMS-based design of a fiber cavity integrated with an ion trap system. Each fiber mirror is supported by a microactuator that controls the mirror's position in three dimensions. The mechanical stability is investigated by a feasibility analysis showing that the actuator offers a stable support of the fiber. The actuators move the fibers' positions continuously with a stroke of more than 10 $\mu$m, with mechanical resonance frequencies on the order of kHz. A calculation of the trapping potential shows that a separation between ion and fiber consistent with strong ion-cavity coupling is feasible. Our miniaturized ion-photon interface constitutes a viable approach to integrated hardware for quantum information.