Measurement of exciton fraction of microcavity exciton-polaritons using transfer-matrix modeling
arXiv:2406.12940
Abstract
We present a careful calibration of the exciton fraction of polaritons in high- (), long-lifetime ( ps), GaAs/AlGaAs microcavities.This is a crucial parameter for many-body theories which include the polariton-polariton interactions.It is much harder to establish this number in high- structures compared to low- structures, because the upper polariton is nearly invisible in high- cavities.We present a combination of photoluminescence, photoluminescence excitation, and reflectivity measurements to highly constrain the fit model, and compare the results of this model to the results from low- structures.We present a fitted curve of exciton fraction as a function of the lower polariton energy for multiple samples which have been used in prior experiments.
16 pages, 11 figures