Researchers have developed an optomechanical bio-dart that allows for neural stimulation and modulation with sub-cellular precision. The technology appears to be part of a broader field of study that involves the use of light and other methods to manipulate and interact with biological particles and cells. Various related techniques and tools, including optical tweezers and photoacoustic emitters, are also being explored for applications such as neuronal photoactivation and bioparticle manipulation.