Broadband circularly polarizing dichroism with high efficient plasmonic helical surface

Hu, Jingpei; Zhao, Xiaonan; Li, Ruibin; Zhu, Aijiao; Chen, Linghua; Lin, Yu; Cao, Bing; Zhu, Xiaojun; Wang, Chinhua

doi:10.1364/oe.24.011023

Cited by 34 publications

(28 citation statements)

References 21 publications

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“…On drawing the helices close together, their mutual action becomes more pronounced, and the resonance starts exhibiting a blue shift (BS) (Figure c). A similar blue shift of the resonance due to the mutual influence of planar and helical metal metasurface elements was previously observed . The blue shift of the fundamental resonance observed on decreasing the distance between helices is beneficial for the fabrication of structures to control shorter‐wavelength radiation.…”

Section: Characterization and Discussionsupporting

confidence: 77%

Large‐Area 3D‐Printed Chiral Metasurface Composed of Metal Helices

Golod

Seyfi

Buldygin

et al. 2018

Advanced Optical Materials

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of semiconductor technology, such as consecutive lithographic steps with layers alignment, and the deposition and chemical etching of materials, are used. Besides, for preventing the capillary sticking of 3D microstructures and nanostructures, special treatments of surfaces and the supercritical drying technique are used after liquid-etching and resistdevelopment steps. [15,16] In ref.[17], a method was proposed for fabrication of microhelices and nanohelices from elastically strained thin semiconductor strips detached, with the help of selective etching of a sacrificial layer, from the substrate and then rolled in classically shaped 3D helices. The latter approach, combined with supercritical drying, [16] was successively employed for forming, on a GaAs substrate, a chiral metamaterial in the form of a single-layer array of 14.5 µm diameter 3D microhelices fabricated from a strained hybrid semiconductor-metal (In 0.2 Ga 0.8 As/GaAs/Ti/Au) films. [18,19] It was shown that the maximum polarization-plane rotation angle for terahertz radiation having passed the heliceson-substrate system reached 17° at 2.1 THz frequency. A close value for the polarization-plane rotation angle of terahertz radiation, 14°, was also obtained using a structure that involved 3D metal gammadion-shaped elements located directly on the surface of pyramidal trenches etched in a silicon substrate. [20] Experimental data obtained for both chiral metamaterials proved a high effectiveness of the interaction of electromagnetic radiation with the 3D conducting microresonators, thus encouraging the workers to spent further efforts on the search for simpler and cheaper technological solutions.Today, rapid progress in the development of additive technologies [21,22] opens up wide opportunities in the field of 3D chiral resonator elements, 3D metamaterials, and photonic crystals. [23][24][25] A number of sequential 3D printing methods have enabled the point-by-point formation of free-standing conducting helices for chiral metamaterials active in a broad range of radiation wavelengths, from microwave (MW) to optical frequencies. Those methods can be classed to several groups. First, these are methods including the electrochemical and chemical deposition of metals onto the surface of printed 3D polymer structures: i) filling of helically shaped channels with a metal [9,26] and ii) covering of free-standing 3D helical microcarcasses with a metal. [27] Second, this is the growth of An original design for chiral metasurfaces formation is proposed. The hybrid fabrication approach is based on the 3D printing of polymer substrates with a shape-generating "helical" relief, molding, and subsequent shadow metal deposition. The formed double-layer grating of multiturn metal helices rotates the polarization plane of sub-terahertz and microwave radiation through an angle in excess of 40°. Both experimentally and in numerical simulations, it is demonstrated that re-reflection phenomena occur in the "metal helixpolymer substrate" hybrid structure. Those phenomena per...

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Section: Characterization and Discussionsupporting

confidence: 77%

Large‐Area 3D‐Printed Chiral Metasurface Composed of Metal Helices

Golod

Seyfi

Buldygin

et al. 2018

Advanced Optical Materials

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“…The experimentally retrieved CD reaches a maximum value of approximately 2.5 %. It should be emphasized again that this value is recorded for a single nanohelix, in contrast to most of the studies reporting on CD values for large arrays of chiral nanostructures [13,40,43,[46][47][48]51]. In the case discussed here, a single nanohelix with an approximate diameter of only 120 nm is excited by a Gaussian beam focused weakly down to a spot with diameter of around 1.2 µm (full width at half maximum at λ = 1450 nm).…”

Section: Chiroptical Response Of a Single-loop Nanohelixmentioning

confidence: 67%

Chiroptical response of a single plasmonic nanohelix

Woźniak¹,

León²,

Höflich³

et al. 2018

Opt. Express

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Abstract:We investigate the chiroptical response of a single plasmonic nanohelix interacting with a weakly focused circularly polarized Gaussian beam. The optical scattering at the fundamental resonance is characterized experimentally and numerically. The angularly resolved scattering of the excited nanohelix is verified experimentally and it validates the numerical results. We employ a multipole decomposition analysis to study the fundamental and first higher-order resonance of the nanohelix, explaining their chiral properties in terms of the formation of chiral dipoles. N. Gadegaard and M. Kadodwala, "Ultrasensitive detection and characterization of biomolecules using superchiral fields," Nat. Nanotechnol. 5, 783-787 (2010). 4. Y. Zhao, L. Xu, W. Ma, L. Wang, H. Kuang, C. Xu and N. A. Kotov, "Shell-engineered chiroplasmonic assemblies of nanoparticles for zeptomolar DNA detection," Nano Lett. 14(7), 3908-3913 (2014). 5. C. Jack. A. S. Karimullah, R. Leyman, R. Tullius, V. M. Rotello, G. Cooke, N. Gadegaard, L. D. Barron and M.Kadodwala, "Biomacromolecular stereostructure mediates mode hybridization in chiral plasmonic nanostructures," Nano Lett. 16(9), 5806-5814 (2016

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“…It is observed that the spectral CPD (defined as CPD = T RCP − T LCP , where T RCP and T LCP are the transmission coefficients of the RCP and LCP incidences, respectively) in the entire 3–5 µm region is flat and greater than 0.7. It should be mentioned that this high and flat CPD in the wide spectral region is achieved with a gradient phase distributed structure (i.e., with varied helical units over entire device), which is in contrast to the previous reports using uniform structures …”

Section: Theory and Structure Designmentioning

confidence: 63%

“…Dichroism metasurfaces that exhibit strong optical activity (OA) and circular polarization dichroism (CPD) due to the flexible design of metamolecules in terms of structure, dimension, and materials, have attracted much attention recently. 3D chiral metamaterials exhibit superb CPD in the middle‐infrared band that transmits the opposite handedness of the circular polarization and structural helix such as the 3D gold helix wires array and 3D gold helical surface array due to the plasmonic effect and the chirality matching/mismatching between the metamaterial and the incidence. In an alternative approach to the use of the 3D chiral metamaterials, strong CPD can also be achieved using a planar chiral metasurface with broken in‐plane mirror symmetry, with examples such as an etched Z‐shaped Si metasurface and L‐shaped gold metasurface at telecom wavelengths and giant intrinsic chiro‐optical activity with TiO 2 gammadions overlaid on a TiO 2 thin film on a glass substrate at 540 nm …”

Section: Introductionmentioning

confidence: 99%

Chiral Metalens of Circular Polarization Dichroism with Helical Surface Arrays in Mid‐Infrared Region

Sun

Guo

et al. 2019

Advanced Optical Materials

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polarization manipulation elements have been the two of the most widely investigated device types because of the essential and indispensable functions of these elements. [5][6][7][8][9] In contrast with the traditional bulky optical lenses, a metalens is a micro/ nanostructured metasurface lens in which the amplitude, phase, and polarization state of the transmitted or reflected electromagnetic waves can be manipulated by the micro/nanostructures at the subwavelength scale based on the effects of surface plasmonic polaritons (SPP) or localized surface plasmonics (LSP), [10][11][12][13][14] Mie resonances, [15] and geometric phase (also known as Pancharatnam-Berry phase, P-B phase), [9,[16][17][18][19][20][21][22][23][24] using which focusing, imaging and/or wavefront manipulation in the transmission or reflection can be achieved. Plasmonic lenses consist of an array of metal plasmonic antennas in which a phase discontinuity related to the geometry and dimension of the metallic antennas appears between the incident electromagnetic wave and the transmitted and/or reflected electromagnetic wave due to the SPP/LSP effects. The ability to generate a spherical wavefront or nondiffracting Bessel beam by an array of gold (Au)_ V-shaped nanoantennas with different geometries and dimensions has been experimentally demonstrated at telecom wavelengths. [13] A dual-polarity metalens consisting of an array of plasmonic dipole antennas on a glass substrate with various orientations has also been experimentally demonstrated, in which a convex or concave lens can be realized with an opposite circular polarized illumination, i.e., either left-handed circular polarization (LCP) or right-handed circular polarization (RCP). [14] Using the similar plasmonic dipoles made of subwavelength metallic nanorods with spatially varying orientations, high-resolution 3D holography can also be achieved. [25] Unlike the plasmonic lens, the all-dielectric metalens based on Mie resonances can also achieve focusing with high efficiency, and a metalens with Si elliptical disks with different dimensions embedded in glass substrate was proposed for this purpose. [15] Recently, the P-B phase has attracted much attention and has been employed in focusing/imaging of the optical metasurface. Unlike the propagation phase, the P-B phase is achieved using azimuth-varied nano/micrograting structures. [26,27] Each nano/microunit (metamolecule) of the metalens is similar to a local half-wave plate (HWP) with different azimuthal angle (θ), so that the circular polarization state of the transmission or reflection is orthogonal to that of the A chiral metalens of circular polarization dichroism (CPD) in the mid-infrared region of 3-5 µm is demonstrated both theoretically and experimentally, in which one of the circularly polarized light beams (either left-handed or righthanded) is transmissively focused at a designed focal length, while the other beam is reflected. The metalens consists of subwavelength helical surface arrays covered by a gold thin film that gives r...

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Broadband circularly polarizing dichroism with high efficient plasmonic helical surface

Cited by 34 publications

References 21 publications

Large‐Area 3D‐Printed Chiral Metasurface Composed of Metal Helices

Large‐Area 3D‐Printed Chiral Metasurface Composed of Metal Helices

Chiroptical response of a single plasmonic nanohelix

Chiral Metalens of Circular Polarization Dichroism with Helical Surface Arrays in Mid‐Infrared Region

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