➀ Scientists have developed a method using elliptical micropillars to enhance the generation and detection of coherent acoustic phonons in the gigahertz range. ➁ This advancement addresses the challenge of controlling hypersound at the nanoscale and could revolutionize optophononic technologies. ➂ The technique leverages the unique properties of elliptical micropillars to achieve optimal conditions for both phonon generation and detection, promising applications in quantum communication and data processing.