Exceptional points in parity-time symmetric optics and photonics have in recent years been promoted in various contexts of light-matter interactions. In particular, the spectrum with coalescing eigenvalues changes dramatically the photonics system's response to perturbations. The talk will discuss both some fundamental aspects of this, including limitations associated with causality, as well as some of the pros and cons for pratical sensor applications, including the noise limitations on the detection limit.

© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

N. Asger Mortensen, "Exceptional-point photonics: the blessing and the curse of enhanced light-matter interactions," Proc. SPIE PC12447, Quantum Sensing, Imaging, and Precision Metrology, PC1244722 (Presented at SPIE Quantum West: January 31, 2023; Published: 9 March 2023); https://doi.org/10.1117/12.2657362.6321510440112.