104 citations · 464 across the 27 of their papers we have counts for
22 papers · 1 filter
Fully programmable slow light based on a spinor representation of generalized coupled-resonator-induced transparency
Seungkyun Park, Beomjoon Chae, Hyungchul Park +3
Electromagnetically induced transparency (EIT), arising from quantum interference in coherently driven atomic systems, has inspired a variety of photonic analogues, such as coupled…
Non-Hermitian stealthy hyperuniformity
Gitae Lee, Seungmok Youn, Ikbeom Lee +5
Symmetry-driven wave physics in open systems, exemplified by parity-time (PT) symmetry, has extended the landscape of crystalline phases in materials science to include gain-loss m…
Nonlinear unitary circuits for photonic neural networks
Sunkyu Yu, Xianji Piao, Namkyoo Park
Photonics has unlocked the potential for energy-efficient acceleration of deep learning. Most approaches toward photonic deep learning have diligently reproduced traditional deep l…
Programmable photonic unitary circuits for light computing
Kyuho Kim, Kunwoo Park, Hyungchul Park +3
Unitarity serves as a fundamental concept for characterizing linear and conservative wave phenomena in both classical and quantum systems. Developing platforms that perform unitary…
Programmable lattices for non-Abelian topological photonics and braiding
Gyunghun Kim, Jensen Li, Xianji Piao +2
Non-Abelian physics, originating from noncommutative sequences of operations, unveils novel topological degrees of freedom for advancing band theory and quantum computation. In pho…
Computing Riemann zeros with light scattering
Sunkyu Yu, Xianji Piao, Namkyoo Park
Finding hidden order within disorder is a common interest in material science, wave physics, and mathematics. The Riemann hypothesis, stating the locations of nontrivial zeros of t…
Programmable photonic time circuits for highly scalable universal unitaries
Xianji Piao, Sunkyu Yu, Namkyoo Park
Programmable photonic circuits (PPCs) have garnered substantial interest in achieving deep learning accelerations and universal quantum computations. Although photonic computation…
Machine learning identifies scale-free properties in disordered materials
Sunkyu Yu, Xianji Piao, Namkyoo Park
The vast amount of design freedom in disordered systems expands the parameter space for signal processing, allowing for unique signal flows that are distinguished from those in reg…
Topological protection in nonlinear optical dynamics with parity-time symmetry
Sunkyu Yu, Xianji Piao, Namkyoo Park
Topological phases exhibit properties that are conserved for continuous deformations, as demonstrated in topological protections in condensed-matter physics and electromagnetic wav…
Topological hyperbolic lattices
Sunkyu Yu, Xianji Piao, Namkyoo Park
Non-Euclidean geometry, discovered by negating Euclid's parallel postulate, has been of considerable interest in mathematics and related fields for the description of geographical…
Chirality in non-Hermitian photonics
Sunkyu Yu, Xianji Piao, Namkyoo Park
Chirality is ubiquitous from microscopic to macroscopic phenomena in physics and biology, such as fermionic interactions and DNA duplication. In photonics, chirality has traditiona…
Transverse spinning of light with globally unique handedness
Xianji Piao, Sunkyu Yu, Namkyoo Park
Access to the transverse spin of light has unlocked new regimes in topological photonics and optomechanics. To achieve the transverse spin of nonzero longitudinal fields, various p…
Dynamical phase diagram of parity-time symmetry with competing saturable channels
Sunkyu Yu, Xianji Piao, Namkyoo Park
Nonlinear channels play a critical role in realizing dynamical functions. Neural ionic channels and non-volatile memristors each derive representative biological and electrical fun…
Digital building blocks for controlling random waves based on supersymmetry
Sunkyu Yu, Xianji Piao, Namkyoo Park
Harnessing multimode waves allows high information capacity through modal expansions. Although passive multimode devices including waveguides, couplers, and multiplexers have been…
Target decoupling in a coupled optical system resistant to random perturbation
Sunkyu Yu, Xianji Piao, Namkyoo Park
To suppress unwanted crosstalks between nearby optical elements, the decoupling technique for integrated systems has been desired for the target control of light flows. Although cl…
Acceleration toward polarization singularity inspired by relativistic ExB drift
Sunkyu Yu, Xianji Piao, Namkyoo Park
The relativistic trajectory of a charged particle driven by the Lorentz force is different from the classical one, by velocity-dependent relativistic acceleration term. Here we sho…
Interdimensional optical isospectrality inspired by graph networks
Sunkyu Yu, Xianji Piao, Jiho Hong +1
A network picture has been applied to various physical and biological systems to understand their governing mechanisms intuitively. Utilizing discretization schemes, both electrica…
Metadisorder for designer light in random-walk systems
Sunkyu Yu, Xianji Piao, Jiho Hong +1
Disorder plays a critical role in signal transport, by controlling the correlation of systems. In wave physics, disordered potentials suppress wave transport due to their localized…
Progress toward high-Q perfect absorption: A Fano antilaser
Sunkyu Yu, Xianji Piao, Jiho Hong +1
Here we propose a route to the high-Q perfect absorption of light by introducing the concept of a Fano anti-laser. Based on the drastic spectral variation of the optical phase in a…
Bloch-like waves in random-walk potentials based on supersymmetry
Sunkyu Yu, Xianji Piao, Jiho Hong +1
Bloch's theorem was a major milestone that established the principle of bandgaps in crystals. Although it was once believed that bandgaps could form only under conditions of period…
One-Way Optical Transition based on Causality in Momentum Space
Sunkyu Yu, Xianji Piao, KyungWan Yoo +2
The concept of parity-time (PT) symmetry has been used to identify a novel route to nonreciprocal dynamics in optical momentum space, imposing the directionality on the flow of lig…
Low-dimensional optical chirality in complex potentials
Sunkyu Yu, Hyun Sung Park, Xianji Piao +2
Chirality is a universal feature in nature, as observed in fermion interactions and DNA helicity. Much attention has been given to chiral interactions of light, not only regarding…