Scientists at the National Institute of Standards and Technology (NIST) and the Joint Quantum Institute (JQI) have successfully demonstrated a new method for controlling vibrations in a device known as a phonon laser. While this is currently a scientific discovery rather than a formal industry standard, the research establishes a reliable protocol for achieving single-mode operation in mechanical systems. Previously, this “mode competition” behavior—where one vibration frequency suppresses others—was only well understood in optical lasers; now it has been observed and controlled in mechanical systems for the first time.
The experiment used a thin membrane inside a light-trapping device, where light pressure could trigger mechanical vibrations. The team discovered that by adjusting the light intensity, they could force any specific vibration mode to dominate while others were suppressed through a process called “anomalous cooling.” This allows the device to produce coherent mechanical vibrations at a well-defined frequency, similar to how optical lasers produce consistent light.
Currently, this finding is in the research and development phase rather than being implemented in commercial products. The primary impact is paving the way for high-precision metrology and commercial applications that require stable mechanical vibration sources. While no specific implementation timeline was provided, this breakthrough brings mechanical lasers closer to the reliability and utility that optical lasers have enjoyed for the past fifty years.
Source: https://www.nist.gov/news-events/news/2013/11/controllable-mode-competition-phonon-laser
Keywords: phonon laser, mode competition, optomechanical oscillator
