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23 papers · 1 filter
Enhancement of signal-to-noise ratio at a high-order exceptional point of coherent perfect absorption
Zi-Qi Wang, Yi-Ming Sun, Yao-Dong Hu +4
Exceptional points (EPs) in non-Hermitian systems offer a remarkably strong response to weak perturbations, but the nonorthogonal nature of the corresponding eigenvectors causes no…
Non-Abelian gauge field optics in the time domain
Yucheng Lai, Yongliang Zhang, Kai Chang
Artificial gauge fields open up burgeoning opportunities for wave engineering in different disciplines. So far,previous works have mostly focused on synthesizing spatial gauge fiel…
Emergence of Cascading Flat Bands in Breathing Superlattices
Moru Song, Jingyu Hu, Lina Shi +2
Flat bands have become a pillar of modern condensed matter physics and photonics owing to the vanishing group velocity and diverging density of states. Here, we present a paradigma…
Spintwistronics: Photonic bilayer topological lattices tuning extreme spin-orbit interactions
Peng Shi, Xinxin Gou, Qiang Zhang +6
Twistronics, the manipulation of Moiré superlattices via the twisting of two layers of two-dimensional (2D) materials to control diverse and nontrivial properties, has recently rev…
Direct Zernike Coefficient Prediction from Point Spread Functions and Extended Images using Deep Learning
Yong En Kok, Alexander Bentley, Andrew Parkes +3
Optical imaging quality can be severely degraded by system and sample induced aberrations. Existing adaptive optics systems typically rely on iterative search algorithm to correct…
Ultrafast Kapitza-Dirac effect
Kang Lin, Sebastian Eckart, Hao Liang +8
Similar to the optical diffraction of light passing through a material grating, the Kapitza-Dirac effect occurs when an electron is diffracted by a standing light wave. In its orig…