Humans are capable of building nano-lasers in the lab as of 2009: https://www.technologyreview.com/2009/08/17/210962/the-smallest-laser-ever-made/ https://www.t

Humans are capable of building nano-lasers in the lab as of 2009: https://www.technologyreview.com/2009/08/17/210962/the-smallest-laser-ever-made/ https://www.technologyreview.com/2009/08/17/210962/the-small...