Year: 2025
Type: article
Abstract: Non-Hermitian photonic wave modulators utilizing exceptional points (EPs) was previously proposed as a potential approach to realize high-performance and compact optical modulators. However, their practical implementation has been restricted by their substantial footprint size limit due to stringent adiabatic conditions near EPs. Here, we demonstrate a principle for efficient wave modulation through optimized parametric trajectories around an EP. By employing rapid encirclement or parametric jump over the EP, we achieve an extinction ratio of 43 dB within a total device length of 15 coupling-length unit. Importantly, we show that adiabatic processes around the EP in the initial stage of the entire evolution can be replaced by an instantaneous parametric jump without compromising the switching performance in stark contrast to the conventional wisdom from the standard adiabaticity.
Source: Nanophotonics
Authors: Seung Han Shin, Yu Sung Choi, Yae Jun Kim, Jae Woong Yoon
Institution: Hanyang University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,995
Awards: G4060967372, G69180240
OpenAlex ID: W4407504073