Reconfigurable Circularly Polarized Hemispherical DRA Using Plasmonic Graphene Strips for MIMO Communications

Plasmonics - This paper investigates the radiation characteristics of a Hemispherical- Dielectric Resonator Antenna (DRA) loaded with graphene strips and fed by ridge-gap waveguide (RGW)...     

Polarization-Independent Reconfigurable Graphene Gas Sensor Using Crescent Plasmonic Antenna

Plasmonics - A polarization-independent gas sensor based on crescent plasmonic dipole antenna loaded with graphene monolayer is introduced in this paper for environment...     

Tailoring Infrared Refractory Plasmonic Material to Broadband Circularly Polarized Thermal Emitter

Circularly polarized (CP) thermal emission possesses huge application value in the fields of infrared detecting and polarimetric thermal imaging; however, the naturally occurring infrared source is incoherent and unpolarized. In this paper, we designed a broadband CP source adaptive for high temperature in consideration of the collision frequency of the electrons increasing with temperature. Compared with the structure proposed before, “I”-shaped resonators based on refractory plasmonic material generate the linearly polarized (LP) emission and the dielectric quarter-wave plate enhances the degree of emitted CP by suppressing the parasitic radiation. More than 80 % right-handed circularly polarized (RCP) emissivity in wavelengths ranging from 3.28 to 4.81 μm within 706 to 884 K is theoretically achieved.     

Graphene Plasmonic Crystal: Two-Dimensional Gate-Controlled Chemical Potential for Creation of Photonic Bandgap

Plasmonics - A new design of graphene-based plasmonic waveguide is presented and its transmission properties are studied. The transmission channel is such designed that the chemical potential of...     

Highly Sensitive Plasmonic Refractive Index Sensor Using Doped Silicon: an Alternative to MIM Structures

Plasmonics - Metal–Insulator-Metal (MIM) structures possess a number of shortcomings which include optical loss, tenability, nanofabrication challenges, chemical instability, incompatible...     

Correction to: Using near-infrared spectroscopy to discriminate closely related species: a case study of neotropical ferns

Journal of Plant Research - Identifying plant species requires considerable knowledge and can be difficult without complete specimens. Fourier-transform near-infrared spectroscopy (FT-NIR) is an...     

研究报告: 氧化石墨烯介导的光热免疫疗法治疗转移性小鼠乳腺肿瘤

本研究分别从细胞层面和在体层面,研究纳米氧化石墨烯(nano graphene oxide,NGO)联合805 nm近红外激光对于肿瘤的杀伤和免疫刺激作用．细胞实验证实NGO具有良好的光热转换效应,联合激光治疗,能够有效杀伤肿瘤细胞．此外,NGO能够刺激巨噬细胞产生IL-6及TNFα,并增强激光杀伤的肿瘤细胞对巨噬细胞的免疫刺激效应．在体实验中,在小鼠背部不同位置使用同一瘤株种植两个瘤块,模拟局部原发肿瘤和转移瘤．实验结果表明,NGO联合激光治疗可以有效消融局部肿瘤,并且,未治疗的远隔部位肿瘤生长速度也显著降低．说明NGO联合激光治疗的方式在局部杀伤原位肿瘤的同时,可能诱发了机体的抗肿瘤免疫反应,从而达到了抑制远隔肿瘤生长的效果．