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| 1 | Nature-inspired chiral metasurfaces for circular polarization detection and full-Stokes polarimetric measurements显示文摘The manipulation and characterization of light polarization states are essential for many applications in quantum communication and computing,spectroscopy,bioinspired navigation,and imaging.Chiral metamaterials and metasurfaces facilitate ultracompact devices for circularly polarized light generation,manipulation,and detection.Herein,we report bioinspired chiral metasurfaces with both strong chiral optical effects and low insertion loss.We experimentally demonstrated submicron-thick circularly polarized light filters with peak extinction ratios up to 35 and maximum transmission efficiencies close to 80% at near-infrared wavelengths(the best operational wavelengths can be engineered in the range of 1.3-1.6μm).We also monolithically integrated the microscale circular polarization filters with linear polarization filters to perform full-Stokes polarimetric measurements of light with arbitrary polarization states.With the advantages of easy on-chip integration,ultracompact footprints,scalability,and broad wavelength coverage,our designs hold great promise for facilitating chip-integrated polarimeters and polarimetric imaging systems for quantum-based optical computing and information processing,circular dichroism spectroscopy,biomedical diagnosis,and remote sensing applications. | Ali Basiri Xiahui Chen Jing Bai Pouya Amrollahi Joe Carpenter Zachary Holman Chao Wang Yu Yao | 2019 | Light(Science & Applications)2019，8，1： | 12 |
| 2 | Chip-integrated plasmonic flat optics for mid-infrared full-Stokes polarization detection显示文摘Flat optics presents a new path to control the phase, amplitude, and polarization state of light with ultracompact devices. Here we demonstrate chip-integrated metasurface devices for polarization detection of mid-infrared light with arbitrary polarization states. Six high-performance microscale linear and circular polarization filters based on vertically stacked plasmonic metasurfaces(with total thickness <600 nm) are integrated on the same chip to obtain all four Stokes parameters of light with high accuracy. The device designs can be tailored to operate at any wavelength in the mid-infrared spectral region and are feasible for on-chip integration with mid-infrared(mid-IR) photodetectors and imager arrays. Our work will enable on-chip mid-IR polarimeters and polarimetric imaging systems, which are highly desirable for many applications, such as clinical diagnosis, target detection, and space exploration. | JING BAI CHU WANG XIAHUI CHEN ALI BASIRI CHAO WANG YU YAO | 2019 | Photonics Research2019，7，9： | 8 |
| 3 | Ultrafast low-pump fluence all-optical modulation based on graphene-metal hybrid metasurfaces显示文摘Graphene is an attractive material for all-optical modulation because of its ultrafast optical response and broad spectral coverage.However,all-optical graphene modulators reported so far require high pump fluence due to the ultrashort photo-carrier lifetime and limited absorption in graphene.We present modulator designs based on graphene-metal hybrid plasmonic metasurfaces with highly enhanced light-graphene interaction in the nanoscale hot spots at pump and probe(signal)wavelengths.Based on this design concept,we have demonstrated high-speed all-optical modulators at near and mid-infrared wavelengths(1.56μm and above 6μm)with significantly reduced pump fluence(1–2 orders of magnitude)and enhanced optical modulation.Ultrafast near-infrared pump-probe measurement results suggest that the modulators’response times are ultimately determined by graphene’s ultrafast photocarrier relaxation times on the picosecond scale.The proposed designs hold the promise to address the challenges in the realization of ultrafast all-optical modulators for mid-and far-infrared wavelengths. | Ali Basiri Md Zubair Ebne Rafique Jing Bai Shinhyuk Choi Yu Yao | 2022 | Light(Science & Applications)2022，11，5： | 2 |
| 4 | Synthesis and molecular modeling study of Cu(Ⅱ) complexes derived from 2-(diphenylmethylene)hydrazinecarbothioamide derivatives with cholinesterase inhibitory activities显示文摘2-amino-5-chlorobenzophenone 和 3-aminobenzophenone (L1L4 ) 的 Thiosemicarbazones 被综合了,他们的 Cu (II ) 建筑群(14 ) 与含铜的氯化物经由协作被负担得起。所有这些混合物被 UVvis 和红外光谱学和 CHN 元素的分析描绘。NMR 光谱学也被使用描绘 ligands。在 vitro 胆碱酯酶,为建筑群(14 ) 的禁止的试金证明 IC50 珍视不到 10 mol/L,与建筑群 1 展出大多数活动, IC50 = 为疼痛和 BuChE 的 2.15 mol/L 和 2.16 mol/L 分别地。分子的建模模拟为与疼痛和 BuChE 受体的建筑群 1 揭示了有约束力的相互作用模板。在 DPPH 试金,建筑群也与他们的父母 ligands 相比在 vitro 抗氧化剂活动更出现了。 | Yi Chen Chan Abdussalam Salhin Mohamed Ali Melati Khairuddean Kooi Yeong Khaw Vikneswaran Murugaiyah Alireza Basiri | 2013 | Chinese Chemical Letters2013，24，7： | 1 |
| 5 | Chip-integrated metasurface full-Stokes polarimetric imaging sensor显示文摘Polarimetric imaging has a wide range of applications for uncovering features invisible to human eyes and conventional imaging sensors.Chip-integrated,fast,cost-effective,and accurate full-Stokes polarimetric imaging sensors are highly desirable in many applications,which,however,remain elusive due to fundamental material limitations.Here we present a chip-integrated Metasurface-based Full-Stokes Polarimetric Imaging sensor(MetaPolarIm)realized by integrating an ultrathin(~600 nm)metasurface polarization filter array(MPFA)onto a visible imaging sensor with CMOS compatible fabrication processes.The MPFA is featured with broadband dielectric-metal hybrid chiral metasurfaces and double-layer nanograting polarizers.This chip-integrated polarimetric imaging sensor enables single-shot full-Stokes imaging(speed limited by the CMOS imager)with the most compact form factor,records high measurement accuracy,dual-color operation(green and red)and a field of view up to 40 degrees.MetaPolarIm holds great promise to enable transformative applications in autonomous vision,industry inspection,space exploration,medical imaging and diagnosis. | Jiawei Zuo Jing Bai Shinhyuk Choi Ali Basiri Xiahui Chen Chao Wang Yu Yao | 2023 | Light(Science & Applications)2023，12，10： | 0 |
| 6 | Deterministic assembly of single optical cavity formed by gold dimensional DNA origami显示文摘Controllable strong interactions between a nanocavity and a single emitter is important to manipulating optical emission in a nanophotonic system but challenging to achieve.Herein a three-dimensional DNA origami,named as DNA rack(DR)is proposed and demonstrated to deterministically and precisely assemble single emitters within ultra-small plasmonic nanocavities formed by closely coupled gold nanorods(AuNRs).Uniquely,the DR is in a saddle shape,with two tubular grooves that geometrically allow a snug fit and linearly align two AuNRs with a bending angle <10°.It also includes a spacer at the saddle point to maintain the gap between AuNRs as small as 2-3 nm,forming a nanocavity estimated to be 20 nm^(3) and an experimentally measured O factor of 7.3.A DNA docking strand is designed at the spacer to position a single fluorescent emitter at nanometer accuracy within the cavity.Using Cy5 as a model emitter,a -30-fold fluorescence enhancement and a significantly reduced emission lifetime(from 1.6 ns to 670 ps)were experimentally verified,confirming significant emitter-cavity interactions.This DR-templated assembly method is capable of fitting AuNRs of variable length-to-width aspect ratios to form anisotropic nanocavities and deterministically incorporate different single emitters,thus enabling flexible design of both cavity resonance and emission wavelengths to tailor light-matter interactions at nanometer scale. | Zhi Zhao Xiahui Chen Jiawei Zuo Ali Basiri Shinhyuk Choi Yu Yao Yan Liu Chao Wang | 2022 | Nano Research2022，15，2： | 0 |
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