Ultrafast Linear Kinetic Inductive Photoresponse of YBa2Cu3O7-{\delta} Meander-Line Structures by Photoimpedance Measurements

TL;DR

This paper demonstrates a fast, linear kinetic-inductive photoresponse in YBCO meander-line structures, with bilinear dependence on optical power and bias current, achieving a rise-time as short as 29ps, advancing high-speed photodetection.

Contribution

It introduces the first experimental observation of linear kinetic-inductive photoresponse in YBCO structures with bilinear dependence and ultrafast rise-time.

Findings

Photoresponse amplitude is bilinear in optical power and bias current.

Achieved a rise-time as short as 29 picoseconds.

Identified a trade-off between responsivity and speed.

Abstract

We report the experimental demonstration of linear kinetic-inductive photoresponse of thin-film YBa2Cu3O7-{\delta} (YBCO) meander-line structures, where the photoresponse amplitude, full-width-half-maximum (FWHM), and rise-time are bilinear in the incident optical power and bias current. This bilinear behavior reveals a trade off between obtaining high responsivity and high speed photodetection. We also report a rise-time as short as 29ps in our photoimpedance measurements.