Search query: Reconfigurable 3D plasmonic metamolecules

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abstract: A reconfigurable plasmonic nanosystem combines an active plasmonic structure with a regulated physical or chemical control input. There have been considerable efforts on integration of plasmonic nanostructures with active platforms using top down techniques. The active media include phase transition materials, graphene, liquid crystals and carrier modulated semiconductors, which can respond to thermal, electrical and optical stimuli. However, these plasmonic nanostructures are often restricted to two dimensional substrates, showing desired optical response only along specific excitation directions. Alternatively, bottom up techniques offer a new pathway to impart reconfigurability and functionality to passive systems. In particular, DNA has proven to be one of the most versatile and robust building blocks for construction of complex three dimensional architectures with high fidelity. Here we show the creation of reconfigurable three dimensional plasmonic metamolecules, which execute DNA regulated conformational changes at the nanoscale. DNA serves as both a construction material to organize plasmonic nanoparticles in three dimensions, as well as fuel for driving the metamolecules to distinct conformational states. Simultaneously, the three dimensional plasmonic metamolecules can work as optical reporters, which transduce their conformational changes in situ into circular dichroism changes in the visible wavelength range.
author_names: Anton Kuzyk

Robert Dipl -Ing Schreiber

Hui Zhang

Alexander O Govorov

Tim Liedl

Na Liu
title: Reconfigurable 3D plasmonic metamolecules.
venue: Nature materials
year: 2014

abstract: Plasmonic metamolecules have many peculiar properties and have been applied in biological and materials science such as in reconfigurable 3D building blocks for complex nano architectures and imaging probes for high resolution sensing. In these applications, fast detection of the bond angles of the sub wavelength metamolecules is highly desired. However, angle detection is not the same as orientation detection. The two orientations must be determined simultaneously, and common orientation sensors can only measure one. In this work, we propose and demonstrate a method to resolve the bond angle of a plasmonic metamolecule composed of three spherical nanoparticles. The detection of the bond angle is achieved via modulation depth analysis of polarization resolved dark field images. The underlying mechanism is found to be the opposing responses of the longitudinal and transversal bonding modes to the polarization variation of the incident light. In addition, the spectrally degenerate structures are further distinguished by the spot center localization method. This method may pave the way for practical application of plasmonic metamolecules.
author_names: Yanrong Wang

Ruqiang Zheng

Yufeng Ding

Wenjun Fan

Dahe Liu

Jing Zhou

Jinwei Shi
title: Resolving the bond angle of a plasmonic metamolecule
year: 2017

abstract: Atomic force microscopy (AFM) nanomanipulation has been viewed as a deterministic method for the assembly of plasmonic metamolecules because it enables unprecedented engineering of clusters with exquisite control over particle number and geometry. Nevertheless, the dimensionality of plasmonic metamolecules via AFM nanomanipulation is limited to 2D, so as to restrict the design space of available artificial electromagnetisms. Here, we show that 2D nanomanipulation of the AFM tip can be used to assemble 3D plasmonic metamolecules in a versatile and deterministic way by dribbling highly spherical and smooth gold nanospheres (NSs) on a nanohole template rather than on a flat surface. Various 3D plasmonic clusters with controlled symmetry were successfully assembled with nanometer precision, the relevant 3D plasmonic modes (i.e. artificial magnetism and magnetic based Fano resonance) were fully rationalized by both numerical calculation and dark field spectroscopy. This templating strategy for advancing AFM nanomanipulation can be generalized to exploit the fundamental understanding of various electromagnetic 3D couplings and can serve as the basis for the design of metamolecules, metafluids, and metamaterials.
author_names: Kyung jin Park

Ji-Hyeok Huh

Daewoong Jung

Jin-Sung Park

Gwan Hyun Choi

Gaehang Lee

Pil J Yoo

Hong-Gyu Park

Gi-Ra Yi

Seungwoo Lee
title: Assembly of 3D plasmonic metamolecules by 2D AFM nanomanipulation of highly uniform and smooth gold nanospheres
year: 2017

abstract: We demonstrate a reconfigurable 3D plasmonic nanomachine, which operates in the visible wavelength range. The conformation of this 3D nanomachine can be actively switched through DNA mediated molecular processes in a fully programmable manner.
author_names: Laura Na Liu

Anton Kyzyk

Robert Dipl -Ing Schreiber

Hui Zhang

Alexander O Govorov

Tim Liedl
title: A Reconfigurable 3D Plasmonic Nanomachine
year: 2014

abstract: DNA origami nanotechnology enables selective reconfiguration of plasmonic quasi enantiomers through simple pH tuning. Selective configuration control of plasmonic nanostructures using either top down or bottom up approaches has remained challenging in the field of active plasmonics. We demonstrate the realization of DNA assembled reconfigurable plasmonic metamolecules, which can respond to a wide range of pH changes in a programmable manner. This programmability allows for selective reconfiguration of different plasmonic metamolecule species coexisting in solution through simple pH tuning. This approach enables discrimination of chiral plasmonic quasi enantiomers and arbitrary tuning of chiroptical effects with unprecedented degrees of freedom. Our work outlines a new blueprint for implementation of advanced active plasmonic systems, in which individual structural species can be programmed to perform multiple tasks and functions in response to independent external stimuli.
author_names: Anton Kuzyk

Maximilian J Urban

Andrea Idili

Francesco Ricci

Na Liu
title: Selective control of reconfigurable chiral plasmonic metamolecules
venue: Science Advances
year: 2017

abstract: Molecular chirality is a geometric property that is of great importance in chemistry, biology, and medicine. Recently, plasmonic nanostructures that exhibit distinct chiroptical responses have attracted tremendous interest, given their ability to emulate the properties of chiral molecules with tailored and pronounced optical characteristics. However, the optical chirality of such human made structures is in general static and cannot be manipulated postfabrication. Herein, different concepts to reconfigure the chiroptical responses of plasmonic nano and micro objects are outlined. Depending on the utilized strategies and stimuli, the chiroptical signature, the 3D structural conformation, or both can be reconfigured. Optical devices based on plasmonic nanostructures with reconfigurable chirality possess great potential in practical applications, ranging from polarization conversion elements to enantioselective analysis, chiral sensing, and catalysis.
author_names: Frank Neubrech

Mario Hentschel

Na Liu
title: Reconfigurable Plasmonic Chirality: Fundamentals and Applications.
venue: Advanced materials
year: 2020

abstract: While in most existing terahertz communications systems, the THz carrier wave is transmitted via free space channels, the THz waveguide based integrated solutions can be of great utility at both the transmitter and receiver ends, thus simplifying the miniaturization and mass production of cost effective THz communications systems. Here we present a new type of modular THz integrated circuits based on the two wire plasmonic waveguide components fabricated using a combination of stereolithography (SLA) 3D printing, wet chemistry metal deposition, and hot stamping techniques. Particular attention is paid to the design of the optical circuits based on the two wire waveguides suspended inside a protective micro sized enclosure. Such waveguides feature low transmission and bending losses, as well as low dispersion. Using such waveguides as basic building blocks, we then demonstrate several key optical subcomponents, such as low loss broadband 2x1THz couplers that use two coalescing two wire waveguide bends, as well as broadband waveguide Bragg gratings that feature a paper sheet with a periodic sequence of metal strips inserted into the air gap of a two wire waveguide. Finally, using these developed subcomponents, a two channel add drop multiplexer is demonstrated to operate at 140 GHz. We believe that the reported micro encapsulated two wire waveguide based modular platform can have a strong impact on the field of THz signal processing and sensing due to the ease of device fabrication and handling, high degree of reconfigurability, and high potential for real time tunability.
author_names: Yang Cao

Kathirvel Nallappan

Hichem Guerboukha

Guofu Xu

Maksim Skorobogatiy
title: Additive manufacturing of highly reconfigurable plasmonic circuits for terahertz communications
year: 2020

abstract: For the first time, we have successfully demonstrated a 3 dimensional (3 D) depth scan using an electrically tunable active metasurface, which is an array of plasmonic resonators with an active indium tin oxide (ITO) layer. Our active device can steer a beam in reflection with a positive side mode suppression ratio by independently controlling the amplitude and the phase from 0 to 360deg using two separate bias controls. These are very promising results for small and high speed 3D depth sensing for mobile and automotive applications.
author_names: Sun Il Kim

Junghyun Park

Byung Gil Jeong

Duhyun Lee

Jungwoo Kim

Chang Gyun Shin

Chang Bum Lee

Tatsuhiro Otsuka

Sangwook Kim

Ki-Yeon Yang

Jisan Lee

Inoh Hwang

Jaeduck Jang

K H Ha

Hyuck Choo

Byoung Lyong Choi

Sungwoo Hwang
title: Electrically Reconfigurable Active Metasurface for 3D Distance Ranging
venue: 2020 IEEE International Electron Devices Meeting (IEDM)
year: 2020

abstract: Powered by TCPDF (www.tcpdf.org) This material is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted, except that material may be duplicated by you for your research use or educational purposes in electronic or print form. You must obtain permission for any other use. Electronic or print copies may not be offered, whether for sale or otherwise to anyone who is not an authorised user. Kuzyk, Anton; Urban, Maximilian J. Idili, Andrea; Ricci, Francesco; Liu, Na
author_names: Anton Kuzyk

Maximilian J Urban

Andrea Idili

Francesco Ricci

Na Liu
title: Na Selective control of reconfigurable chiral plasmonic metamolecules
year: 2017

abstract: A reconfigurable plasmonic nanosystem combines an active plasmonic structure with a regulated physical or chemical control input. There have been considerable e orts on integration of plasmonic nanostructures with active platforms using topdown techniques. The active media include phase transition materials, graphene, liquid crystals and carrier modulated semiconductors, which can respond to thermal1, electrical2 and optical stimuli3 5. However, these plasmonic nanostructures are often restricted to two dimensional substrates, showing desired optical response only along specific excitation directions. Alternatively, bottom up techniques o er a new pathway to impart reconfigurability and functionality to passive systems. In particular, DNAhas proven to be one of the most versatile and robust building blocks6 9 for construction of complex three dimensional architectureswith highfidelity10 14. Herewe show the creation of reconfigurable three dimensional plasmonic metamolecules, which execute DNA regulated conformational changes at the nanoscale. DNA serves as both a construction material to organize plasmonic nanoparticles in three dimensions, aswell as fuel for driving themetamolecules to distinct conformational states. Simultaneously, the threedimensional plasmonic metamolecules can work as optical reporters,which transduce their conformational changes in situ into circular dichroismchanges in the visiblewavelength range. Circular dichroism (CD) that is, differential absorption of leftand right handed circularly polarized light, of natural chiral macromolecules is highly sensitive to their three dimensional (3D) conformations15. Taking a similar strategy, we create 3D reconfigurable plasmonic chiral metamolecules4,16, whose conformation changes are highly correlated with their pronounced and distinct CD spectral changes in the visiblewavelength range. Figure 1a shows the design schematic. Two gold nanorods (AuNRs) are hosted on a reconfigurable DNA origami template7,10, which consists of two 14 helix bundles (80 nm x 16 nm x 8 nm) folded from a long single stranded DNA (ssDNA) scaffold with the help of hundreds of staple strands13. The two origami bundles are linked together by the scaffold strand passing twice between them at one point. To ensure the mobility of the DNA bundles and avoid the formation of a Holliday junction17, 8 unpaired bases are introduced to each ssDNA connector (Supplementary Note 1) Twelve binding sites are extended from each origami bundle for robust assembly of one AuNR (38 nm x 10 nm) functionalized with complementary DNA (Supplementary Note 2) The surface to surface distance of the two AuNRs is roughly 25 nm. Owing to close proximity, the excited plasmons in the two AuNRs can be strongly coupled18. The two crossed AuNRs constitute a 3D plasmonic chiral object19 22, which generates a theme of handedness when interacting with leftand right handed circularly polarized light, giving rise to strong CD. Left handed Right handed Relaxed R1 R2 Waste 1 Waste 2
author_names: Anton Kuzyk

Robert Dipl -Ing Schreiber

Hui Zhang

Alexander O Govorov

Tim Liedl

Na Liu
title: Reconfigurable 3 D plasmonic metamolecules
year: 2014