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| 1 | All-angle optical switch based on the zero reflection effect of graphene–dielectric hyperbolic metamaterials显示文摘We have studied a switchable hyperbolic metamaterial composed of a graphene–dielectric periodic structure.By tuning the chemical potential of all graphene sheets simultaneously, the isofrequency curve can switch between an ellipse and a hyperbola conveniently. In particular, a special hyperbolic isofrequency curve with its asymptote perpendicular to the interface is obtained and used to realize the zero reflection effect. Furthermore, a zeroreflection-based optical switch working in the terahertz spectrum is demonstrated. Its bandwidth can be efficiently adjusted by geometric parameters such as permittivity and period. Such an optical switch possesses the merits of low loss, high transmittance contrast, high response speed, compact size, high tolerance of chemical potential, and having all incident angles(0°–90°) simultaneously. Such an optical switch holds great potential in many fields,such as data storage, beam steering, and integrated photonic circuits. | WENYAO LIANG ZHENG LI YU WANG WUHE CHEN ZHIYUAN LI | 2019 | Photonics Research2019，7，3： | 1 |
| 2 | Biomass, diversity and composition of epiphytic macrolichens in primary and secondary forests in the subtropical Ailao Mountains, SW China显示文摘 | Su Li Wenyao Liu Lisong Wang Wenzhang Ma Liang Song | 2011 | Forest Ecology and Management2011，，11： | 1 |
| 3 | Switchable slow light rainbow trapping and releasing in strongly coupling topological photonic systems显示文摘We design and present a switchable slow light rainbow trapping(SLRT) state in a strongly coupling topological photonic system made from a magneto-optical photonic crystal waveguide channel. The waveguide channel supports slow light states with extremely small group velocity(vg2.1 × 10-6c), low group-velocity dispersion, and a broadband operation bandwidth(3.60–4.48 GHz, near 22% of bandwidth). These slow light states originate from the strong coupling between two counter propagating topological photonic states. Under a gradient magnetic field, different frequency components of a wave packet are separated and stored at different positions for a long temporal duration with high spatial precision(without crosstalk and overlap between the electric fields of different frequencies) to form SLRT. Besides, these SLRT states can be easily switched among the forbidden state,trapped state, and releasing state by tuning the external magnetic field. The results suggest that the topological photonic state can offer a precise route of spatial-temporal-spectral control upon a light signal and find applications for optical buffers, broadband slow light systems, optical filters, wavelength-division multiplexing, and other optical communication devices. | JIANFENG CHEN WENYAO LIANG ZHI-YUAN LI | 2019 | Photonics Research2019，7，9： | 1 |
| 4 | Supramolecular assembly-derived carbon-nitrogen-based functional materials for photo/electrochemical applications: progress and challenges显示文摘Supramolecular chemistry during the synthesis of carbon-nitrogen-based materials has recently experienced a renaissance in the arena of photocatalysis and electrocatalysis.In this review,we start with the discussion of supramolecular assemblies-derived carbon-nitrogen-based materials’regulation from the aspect of morphology,chemical composition,and micro/nanostructural control.Afterwards the recent advances of these materials in energy and environment related applications,including degradation of pollutants,water splitting,oxygen reduction reactions,CO_(2) reduction reactions along with organic synthesis are summarized.The correlations between the structural features and physicochemical properties of the carbonnitrogen-based materials and the specific catalytic activity are discussed in depth.By highlighting the opportunities and challenges of supramolecular assembly strategies,we attempt an outlook on possible future developments for highly efficient carbon-based photo/electrocatalysts. | Fanglei Yao Chenchen Fang Junjie Cui Liming Dai Xiaoyuan Zhang Liang Xue Pan Xiong Yongsheng Fu Wenyao Zhang Jingwen Sun Junwu Zhu | 2023 | National Science Open2023，2，4： | 0 |
| 5 | Topological large-area one-way transmission in pseudospin-field-dependent waveguides using magneto-optical photonic crystals显示文摘We propose a pseudospin-field-dependent waveguide(PFDW)by constructing a sandwiched heterostructure consisting of three magneto-optical photonic crystals(MOPCs)with different geometric parameters.The upper expanded MOPC applied with an external magnetic field has broken time-reversal symmetry(TRS)and an analogous quantum spin Hall(QSH)effect,while the middle standard and the lower compressed ones are not magnetized and trivial.Attributed to the TRS-broken-QSH effect of the upper MOPC,the topological large-area one-way transmission that uniformly distributes over the middle domain is achieved and exhibits the characteristics of a pseudospin-field-momentum-locking;i.e.,pseudospin-down(or pseudospin-up)leftward(or rightward)waveguide state when the positive(or negative)magnetic field is applied on the upper MOPC.We further demonstrate the strong robustness of the PFDW against backscattering from various kinds of defects.In addition,a topological beam modulator that can compress or expand the light beam,and a large-area pseudospin beam splitter have been designed.These results have potential in various applications such as sensing,signal processing,and optical communications. | XINYUE YU JIANFENG CHEN ZHI-YUAN LI WENYAO LIANG | 2023 | Photonics Research2023，11，6： | 0 |
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