Implication of the double-gating mode in hybrid photon counting detector for measurements of transient heat conduction in GaAs/AlAs superlattice structures

TL;DR

This paper demonstrates that using the double-gating mode of the EIGER2 detector improves data quality and analysis speed in transient heat conduction measurements of GaAs/AlAs superlattices, aiding phonon dynamics studies.

Contribution

It introduces the application of the EIGER2 detector's double-gating mode for enhanced transient heat conduction measurements in superlattice structures.

Findings

Double-gating mode yields faster data acquisition.

Improved data quality reduces sensitivity to beam fluctuations.

Facilitates easier data analysis and interpretation.

Abstract

Understanding and control of thermal transport in solids at nanoscale is crucial to engineer and to enhance properties of a new generation of optoelectronic, thermoelectric, and photonic devices. In this regard, semiconductor superlattice structures provide a unique platform to study phenomena associated with phonon propagations in solids such as heat conduction. Transient X-ray diffraction can directly probe atomic motions and therefore is among the rare techniques sensitive to phonon dynamics in a condensed matter. Here, we study optically induced transient heat conduction in GaAs/AlAs superlattice structures using EIGER2 detector. Benchmark experiments have been performed at the Austrian SAXS beamline at Elettra Sincrotrone Trieste that operated in the hybrid filling mode. We demonstrate that drifts of experimental conditions, such as synchrotron beam fluctuations, become less essential when utilizing EIGER2 double gating mode that results in a faster acquisition of high quality data and facilitates data analysis and data interpretation.