First observation of energy-difference conservation in optical domain

Pohang, South Korea (SPX) Sep 24, 2021 When optical gain or loss are precisely controlled using nanophotonics, a new physical event called the non-Hermitian phenomenon can be observed, potentially the next-generation technology of optical signal control and sensing. However, it is difficult to control the optical gain and loss in optical experiments precisely. Recently, a research team led by Professor Heedeuk Shin of the Depar