Photoacoustic spectroscopy of semiconductor heterostructures by piezoelectric transducers. II. Space‐resolved detection of photoacoustic modes

摘要

Photoacoustic spectroscopy was applied to a III‐V semiconductor heterostructure layer on a substrate to observe the indirect transition absorption edge. An array of electrodes on a piezoelectric transducer resolved spatially the excited photoacoustic vibration modes in the sample.