Phys.org July 7, 2021
Parity-time reversal symmetry in non-Hermitian systems realizes spontaneous symmetry breaking. A team of researchers in South Korea have demonstrated that such direct coupling can remodel conventional photonic platforms of non-Hermitian systems into polaritonic platforms with a single component; thus, improving the degrees of freedom of both integration and design for the coupled system. In this system, they found that as energy loss increased, the amount of energy needed to induce lasing decreased. By controlling the degree of loss between the microcavity and the semiconductor substrate the threshold energy becomes smaller as energy loss increases. According to the researchers exploiting this phenomenon could lead to the development of high efficiency, low threshold lasers for future quantum optical devices…read more. TECHNICAL ARTICLEÂ
Polaritonic non-Hermitian system based on hexagonal microcavity. Credit: Nature Photonics (2021)Â