Symmetric reflection line resonator for semiconductor circuit quantum electrodynamics

TL;DR

This paper introduces a novel half-wavelength reflection line resonator (RLR) for semiconductor quantum circuits, demonstrating tunable quality factors and minimized energy loss in a GaAs/AlGaAs heterostructure.

Contribution

The work presents the design and fabrication of a symmetric RLR with tunable quality factors, enhancing integration with semiconductor quantum circuits.

Findings

Tunable quality factors achieved via gate voltage control

Minimized energy loss in the two-dimensional electron gas

Versatile resonator suitable for quantum circuit integration

Abstract

We have designed and fabricated a half-wavelength reflection line resonator (RLR) that consists of a pair of two coupled microstrip lines on a GaAs/AlGaAs heterostructure. By changing the top gate voltage on a square of two dimensional electron gas under the resonator, a large range of the quality factors can be obtained. Energy loss in the two-dimensional electron gas can be minimized, thus realizing a versatile resonator suitable for integration with semiconductor quantum circuits.