On-Chip Fabrication-Tolerant Exceptional Points Based on Dual-Scatterer Engineering

J Li, W Li, Y Feng, J Wang, Y Yao, Y Sun, Y Zou… - Nano Letters, 2024 - ACS Publications
The intriguing and anomalous optical characteristics of exceptional points (EPs) in optical
resonators have attracted significant attention. While EP-related phenomena have been …

On the effect of the thermal cross-talk in a photonic feed-forward neural network based on silicon microresonators

S Biasi, R Franchi, D Bazzanella, L Pavesi - Frontiers in Physics, 2022 - frontiersin.org
Local heating is widely used to trim or tune photonic components in integrated optics.
Typically, it is achieved through the power dissipation of metal microwires driven by a …

[HTML][HTML] The infinity-loop microresonator: A new integrated photonic structure working on an exceptional surface

R Franchi, S Biasi, D Piciocchi, L Pavesi - APL Photonics, 2023 - pubs.aip.org
Exceptional points, where eigenvalues and eigenvectors coalesce, impact the behavior of
different photonics components that show, eg, enhanced sensing, coherent perfect …

On the spectral response of a taiji-CROW device

B Aslan, R Franchi, S Biasi, S Ali, L Pavesi - Optics Express, 2024 - opg.optica.org
Physical systems with topological properties are robust against disorder. However,
implementing them in integrated photonic devices is challenging because of the various …

Non-orthogonal cavity modes near exceptional points in the far field

J Yang, S Shi, S Yan, R Zhu, X Zhao, Y Qin… - Communications …, 2024 - nature.com
Non-orthogonal eigenstates are a fundamental feature of non-Hermitian systems and are
accompanied by the emergence of nontrivial features. However, the platforms to explore non …

On the response of the Taiji microresonator against small perturbation of the counter propagating mode

R Franchi, S Biasi, F Mione… - Integrated Optics: Devices …, 2022 - spiedigitallibrary.org
In this work, we study the eigenvalues and eigenvectors of a taiji microresonator that is
made by a ring cavity with an embedded S-shaped waveguide. Specifically, we …

Interferometric cavity ringdown technique for ultrahigh Q-factor microresonators

S Biasi, R Franchi, L Pavesi - Optics Letters, 2022 - opg.optica.org
Microresonators (MRs) are key components in integrated optics. As a result, the estimation
of their energy storage capacity as measured by the quality factor (Q) is crucial. However, in …

Modeling the Non-Hermitian Infinity-Loop Micro-Resonator over a Free Spectral Range Reveals the Characteristics for Operation at an Exceptional Point

T Li, MP Halsall, IF Crowe - Symmetry, 2024 - mdpi.com
We develop a 4× 4-matrix model based on temporal coupled mode theory (TCMT) to
elucidate the intricate energy exchange within a non-Hermitian, resonant photonic structure …

Investigating the Spectral Response of a Taiji-CROW Device

B Aslan, R Franchi, S Biasi, S Ali, L Pavesi - European Conference on …, 2024 - Springer
We report a study on modeling, designing, and testing an integrated photonic structure
based on a sequence of two taiji microresonators coupled with a middle link microresonator …

Coupled Resonators Optical Waveguide Based on Taiji Microresonators

B Aslan, R Franchi, S Biasi, S Ali… - 2023 IEEE Photonics …, 2023 - ieeexplore.ieee.org
We model and measure the transmission and reflection properties of a new integrated
photonic structure consisting of two taiji microresonators coupled with a middle link …