341 citations · 1.1k across the 24 of their papers we have counts for
24 papers
Annihilation of Dirac points and its topological obstruction in a photonic Kagome lattice
Zhaoyang Zhang, Matthieu Finck, Changchang Li +7
Dirac points (DPs) are topological singularities that determine the extraordinary properties of two-dimensional materials. They are generally classified by discrete topological inv…
Nonreciprocal spontaneous parametric process
Changbiao Li, Jiaqi Yuan, Ruidong He +5
Mediated by the interaction with quantum vacuum fields, a laser field propagating in a nonlinear optical medium can generate new light fields via spontaneous parametric process. Su…
Non-Hermitian delocalization in a 2D photonic quasicrystal
Zhaoyang Zhang, Shun Liang, Ismael Septembre +7
Quasicrystals show long-range order, but lack translational symmetry. So far, theoretical and experimental studies suggest that both Hermitian and non-Hermitian quasicrystals show…
Loss-difference-induced localization in a non-Hermitian honeycomb photonic lattice
Yuan Feng, Zhenzhi Liu, Fu Liu +6
Non-Hermitian systems with complex-valued energy spectra provide an extraordinary platform for manipulating unconventional dynamics of light. Here, we demonstrate the localization…
Simultaneous creation of multiple vortex-antivortex pairs in momentum space in photonic lattices
Feng Li, S. V. Koniakhin, A. V. Nalitov +6
Engineering of the orbital angular momentum (OAM) of light due to interaction with photonic lattices reveals rich physics and motivates potential applications. We report the experi…
Angular-dependent Klein tunneling in photonic graphene
Zhaoyang Zhang, Yuan Feng, Feng Li +7
The Klein paradox consists in the perfect tunneling of relativistic particles through high potential barriers. As a curious feature of particle physics, it is responsible for the e…
Spin-orbit coupling in photonic graphene
Zhaoyang Zhang, Shun Liang, Feng Li +6
We generate experimentally a honeycomb refractive index pattern in an atomic vapor cell using electromagnetically-induced transparency. We study experimentally and theoretically th…
Observation of Edge Solitons in Photonic Graphene
Zhaoyang Zhang, Rong Wang, Yiqi Zhang +8
Edge states emerge in diverse areas of science, offering new opportunities for the development of novel electronic or optoelectronic devices, sound and light propagation controls i…
Particle-like behavior of topological defects in linear wave packets in photonic graphene
Zhaoyang Zhang, Feng Li, Guillaume Malpuech +7
Topological defects, such as quantum vortices, determine the properties of quantum fluids. The study of their properties has been at the center of activity in solid state and BEC c…
Parity-time-symmetric optical lattice with alternating gain and loss atomic configurations
Zhaoyang Zhang, Liu Yang, Jingliang Feng +4
Since the spatially extended periodic parity-time (PT) symmetric potential can possess certain unique properties compared to a single PT cell (with only a pair of coupled gain-loss…
Edge states in dynamical superlattices
Yiqi Zhang, Yaroslav V. Kartashov, Feng Li +4
We address edge states and rich localization regimes available in the one-dimensional (1D) dynamically modulated superlattices, both theoretically and numerically. In contrast to c…
Greatly enhanced intensity-difference squeezing for narrow-band quantum metrology applications
Da Zhang, Changbiao Li, Zhaoyang Zhang +4
Narrow-band intensity-difference squeezing beams have important applications in quantum metrology and gravitational wave detection. The best way to generate narrow-band intensity-d…
Unveiling the link between fractional Schrödinger equation and light propagation in honeycomb lattice
Da Zhang, Yiqi Zhang, Zhaoyang Zhang +5
We establish a link between the fractional Schrödinger equation (FSE) and light propagation in the honeycomb lattice (HCL) - the Dirac-Weyl equation (DWE). The fractional Laplacian…
A large enhancement of carrier mobility in phosphorene by introducing hexagonal boron nitride substrate
Jiafeng Xie, Z. Y. Zhang, D. Z. Yang +3
Carrier mobility is a crucial character for electronic devices since it domains power dissipation and switching speed. Materials with certain high carrier mobility, equally, unveil…
Interacting photon pulses in Rydberg medium
Liu Yang, Bing He, Jin-Hui Wu +2
The understanding of dynamical evolutions of interacting photon pulses in Rydberg atomic ensemble is the prerequisite for realizing quantum devices with such system. We present an…
Observation of electromagnetically induced Talbot effect in an atomic system
Zhaoyang Zhang, Xing Liu, Dan Zhang +4
We experimentally demonstrate the Talbot effect resulting from the repeated self-reconstruction of a spatially intensity-modulated probe field under the Fresnel near-field regime.…
Coherent and incoherent nonparaxial self-accelerating Weber beams
Yiqi Zhang, Junfeng Liu, Feng Wen +4
We investigate the coherent and incoherent nonparaxial Weber beams, theoretically and numerically. We show that the superposition of coherent self-accelerating Weber beams with tra…
New face-centered photonic square lattices with flat bands
Yiqi Zhang, Milivoj R. Belić, Changbiao Li +3
We report two new classes of face-centered photonic square lattices with flat bands which we call the Lieb-I and the Lieb-II lattices. There are 5 and 7 sites in the corresponding…
Observation of Parity-Time Symmetry in Optically Induced Atomic Lattices
Zhaoyang Zhang, Yiqi Zhang, Jiteng Sheng +6
We experimentally demonstrate PT-symmetric optical lattices with periodical gain and loss profiles in a coherently-prepared four-level N-type atomic system. By appropriately tuning…
Controllable circular Airy beams via dynamic linear potential
Hua Zhong, Yiqi Zhang, Milivoj R. Belić +4
We investigate controllable spatial modulation of circular autofocusing Airy beams, under action of different dynamic linear potentials, both theoretically and numerically. We intr…
Nonparaxial accelerating Talbot effect
Yiqi Zhang, Hua Zhong, Milivoj R. Belić +5
We demonstrate the fractional Talbot effect of nonpraxial accelerating beams, theoretically and numerically. It is based on the interference of nonparaxial accelerating solutions o…
Storage and retrieval of photons under their mutual interaction in Rydberg medium
Liu Yang, Bing He, Jin-Hui Wu +2
Stopping and regenerating a pair of single-photon pulses at adjacent locations in coherently prepared Rydberg atomic ensembles are significantly affected by their effective interac…
Cyclic permutation-time symmetric structure with coupled gain-loss microcavities
Bing He, Liu Yang, Zhaoyang Zhang +1
We study the coupled even number of microcavities with the balanced gain and loss between any pair of their neighboring components. The effective non-Hermitian Hamiltonian for such…
Controlling multi-wave mixing signals via photonic band gap of electromagnetically induced absorption grating in atomic media
Yiqi Zhang, Zhenkun Wu, Xin Yao +4
We experimentally demonstrate dressed multi-wave mixing (MWM) and the reflection of the probe beam due to electromagnetically induced absorption (EIA) grating can coexist in a five…