560 citations · 1.7k across the 37 of their papers we have counts for
18 papers · 1 filter
Temporal Weyl Physics and Topological Control of Direction-Selected Radiation in Anisotropic Photonic Time Crystals
Zihao He, Sihao Zhang, Huanan Li +1
Anisotropic photonic time crystals, enabled by periodic temporal modulation of a uniform anisotropic medium, exhibit asymmetric momentum-bandgap structures and offer unique control…
Coherent Perfect Absorption in Chaotic Optical Microresonators for Efficient Modal Control
Xuefeng Jiang, Shixiong Yin, Huanan Li +5
Non-Hermitian wave engineering has attracted a surge of interest in photonics in recent years. One of the prominent phenomena is coherent perfect absorption (CPA), in which the ann…
Stationary Charge Radiation in Anisotropic Photonic Time Crystals
Huanan Li, Shixiong Yin, Huan He +3
Time metamaterials exhibit a great potential for wave manipulation, drawing increasing attention in recent years. Here, we explore the exotic wave dynamics in an anisotropic photon…
Photonics of Time-Varying Media
Emanuele Galiffi, Romain Tirole, Shixiong Yin +7
Time-varying media have recently emerged as a new paradigm for wave manipulation, thanks to thesynergy between the discovery of novel, highly nonlinear materials, such as epsilon-n…
Perfect diffraction metagratings supporting bound states in the continuum and exceptional points
Zi-Lan Deng, Feng-Jun Li, Huanan Li +2
Resonance coupling in non-Hermitian systems can lead to exotic features, such as bound states in the continuum (BICs) and exceptional points (EPs), which have been widely employed…
Temporal Parity-Time Symmetry for Extreme Energy Transformations
Huanan Li, Shixiong Yin, Emanuele Galiffi +1
Temporal interfaces introduced by abrupt switching of the constitutive parameters of unbounded media enable unusual wave phenomena. So far, their explorations have been mostly limi…
Implementation of Optimal Thermal Radiation Pumps using Adiabatically Modulated Photonic Cavities
Lucas J. Fernández-Alcázar, Huanan Li, Mona Nafari +1
We numerically implement the concept of thermal radiation pumps in realistic photonic circuits and demonstrate their efficiency to control the radiation current, emitted between tw…
Temporal Switching to Extend the Bandwidth of Thin Absorbers
Huanan Li, Andrea Alù
Wave absorption in time-invariant, passive thin films is fundamentally limited by a trade-off between bandwidth and overall thickness. In this work, we investigate the use of tempo…
Virtual Parity-Time Symmetry
Huanan Li, Ahmed Mekawy, Alex Krasnok +1
Parity-time (PT) symmetry has been opening exciting opportunities in optics, yet the required careful balance of loss and gain has been hindering its practical implementations. Her…
Anomalies in Light Scattering
Alex Krasnok, Denis Baranov, Huanan Li +3
Scattering of electromagnetic waves lies at the heart of most experimental techniques over nearly the entire electromagnetic spectrum, ranging from radio waves to optics and X-rays…
Adiabatic Thermal Radiation Pumps for Thermal Photonics
Huanan Li, Lucas J. Fernández-Alcázar, Fred Ellis +2
We control the direction and magnitude of thermal radiation, between two bodies at equal temperature (in thermal equilibrium), by invoking the concept of adiabatic pumping. Specifi…
Floquet Perfect Absorbers based on Periodically Driven Targets
Dashiell Halpern, Suwun Suwunnarat, Huanan Li +2
We introduce the concept of multichannel Floquet Perfect Absorbers (FPAs) which are periodically modulated lossy interferometric traps that completely absorb incident monochromatic…
Statistical Description of Transport in Multimode Fibers with Mode-Dependent Loss
P. Chiarawongse, H. Li, W. Xiong +3
We analyze coherent wave transport in a new physical setting associated with multimode wave systems where reflection is completely suppressed and mode-dependent losses together wit…
Floquet Protocols of Adiabatic State-Flips and Re-Allocation of Exceptional Points
Dashiell Halpern, Huanan Li, Tsampikos Kottos
We introduce the notion of adiabatic state-flip of a Floquet Hamiltonian associated with a non-Hermitian system that it is subjected to two driving schemes with clear separation of…
Towards a Floquet-Network Theory of Non-Reciprocal Transport
Huanan Li, Tsampikos Kottos, Boris Shapiro
We develop a theoretical framework that lays out the fundamental rules under which a periodic (Floquet) driving scheme can induce non-reciprocal transport. Our approach utilizes an…
Frozen Mode Regime in Finite Periodic Structures
Huanan Li, Ilya Vitebskiy, Tsampikos Kottos
Periodic structures with Bloch dispersion relation supporting a stationary inflection point (SIP) can display a unique scattering feature, the frozen mode regime (FMR). The FMR is…
Driving-induced metamorphosis of transport in arrays of coupled resonators
Huanan Li, Tsampikos Kottos, Boris Shapiro
We propose a new driving scheme, when different parts of a system are driven with different, generally incommensurate, frequencies. Such driving provides a flexible handle to contr…
Half-period Aharonov-Bohm oscillations in disordered rotating optical ring cavities
Huanan Li, Tsampikos Kottos, Boris Shapiro
There exists an analogy between Maxwell equations in a rotating frame and Schrödinger equation for a charged particle in the presence of a magnetic field. We exploit this analogy t…