Local Surface Plasmons Launched Through Afm Lithographic Nanostructures And Propagation Of These Fields Monitored In Real Time Using A Fluorescence Near Field Probe Method
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Local Surface Plasmons Launched Through Afm Lithographic Nanostructures And Propagation Of These Fields Monitored In Real Time Using A Fluorescence Near Field Probe Method
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Author : Gwynn Curran-Sills
language : en
Publisher:
Release Date : 2006
Local Surface Plasmons Launched Through Afm Lithographic Nanostructures And Propagation Of These Fields Monitored In Real Time Using A Fluorescence Near Field Probe Method written by Gwynn Curran-Sills and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Surface Plasmons (SPs) are electromagnetic surface waves that propagate at a metal-dielectric interface. The SP field maintains maximum intensity at the interface and decays away exponentially in the directions perpendicular to the interface. SP fields are only detectable in the near-field region, precluding the use of conventional microscopes to observe such fields. Recently, a simplified method to detect the SP nearfield in the far-field has been created. This technique functions, as we have employed it, by spin coating a polymer-dye layer atop a plasmon carrying metal surface and monitoring the propagation of the SP in real-time through the dye fluorescence. It has been demonstrated that a SP mode can be launched through a grating, where the grating provides a mechanism to couple photon energy into a local SP mode, i.e. the SP mode is confined to the region around the grating. We have utilized a polymer template-chemical etching method to fabricate nanometer-sized gratings in an effort to couple photon energy into a SP mode.
Plasmonic And Near Field Phenomena In Low Dimensional Nanostructures
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Author : Bor-Yuan Jiang
language : en
Publisher:
Release Date : 2018
Plasmonic And Near Field Phenomena In Low Dimensional Nanostructures written by Bor-Yuan Jiang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Plasmonics aims to combine the advantages of nanometer scale electronics with the high operating frequency (terahertz and beyond) of photonics. Control of plasmon propagation can be achieved in a two-dimensional electron gas (2DEG) by tuning the electronic properties of the 1D nanostructures it contains, which act as scatters for plasmons. Plasmonic response of these nanostructures, however, happens on a length scale much smaller than the wavelength of free space electromagnetic radiation and cannot be studied with conventional optical microscopy. Instead, we resolve these nanoscopic phenomena using near-field optical microscopy, which has a spatial resolution of $\sim 20\,\mathrm{nm}$. In this dissertation, we first describe the working principles of near-field optical microscopy, then analyze the plasmonic phenomena we observed around several 1D nanostructures, including a potential well in monolayer graphene, domain walls in bilayer graphene, and a low-conductivity gap in a 2DEG. In Chapter 1, we give an overview of the basic properties of surface plasmons and graphene, followed by a brief explanation of the operating principles of near-field optical microscopy. In Chapter 2, we study theoretically the electromagnetic interaction between a sub-wavelength particle (the 'probe') and a material surface (the 'sample'). The interaction is shown to be governed by a series of resonances corresponding to surface polariton modes localized near the probe. The resonance parameters depend on the dielectric function and geometry of the probe, as well as the surface reflectivity of the material. Calculation of such resonances is carried out for several types of axisymmetric probes: spherical, spheroidal, and pear-shaped. For spheroids an efficient numerical method is developed, capable of handling cases of large or strongly momentum-dependent surface reflectivity. Application of the method to highly resonant materials such as aluminum oxide (by itself or covered with graphene) reveals a rich structure of multi-peak spectra and nonmonotonic approach curves, i.e., the probe-sample distance dependence. These features also strongly depend on the probe shape and optical constants of the model. For less resonant materials such as silicon oxide, the dependence is weak, so that the spheroidal model is reliable. The calculations are done within the quasistatic approximation with radiative damping included perturbatively. In Chapter 3, we show that surface plasmons of a two-dimensional Dirac metal such as graphene can be reflected by line-like perturbations hosting one-dimensional electron states. The reflection originates from a strong enhancement of the local optical conductivity caused by optical transitions involving these bound states. We propose that the bound states can be systematically created, controlled, and liquidated by an ultranarrow electrostatic gate. Using infrared nanoimaging, we obtain experimental evidence for the locally enhanced conductivity of graphene induced by a carbon nanotube gate, which supports this theoretical concept. In Chapter 4, we show that topological bound states confined to the domain walls in bilayer graphene are the source of the wall's strong coupling to surface plasmons observed in infrared nanoimaging experiments. These domain walls separate regions of $\mathrm{AB}$ and $\mathrm{BA}$ interlayer stacking and have attracted attention as novel examples of structural solitons, topological electronic boundaries, and nanoscale plasmonic scatterers. The optical transitions among the topological chiral modes and the band continua enhance the local conductivity, which leads to plasmon reflection by the domain walls. The imaging reveals two kinds of plasmonic standing-wave interference patterns, which we attribute to shear and tensile domain walls. We compute the electronic structure of both wall varieties and show that the tensile wall contains additional confined bands which produce a structure-specific contrast of the local conductivity, in agreement with the experiment. The coupling between the confined modes and the surface plasmon scattering unveiled in this work is expected to be common to other topological electronic boundaries found in van der Waals materials. This coupling provides a qualitatively new pathway toward controlling plasmons in nanostructures. In Chapter 5, we present a comprehensive study of the reflection of normally incident plasmon waves from a low-conductivity 1D junction in a 2D conductive sheet. Rigorous analytical results are derived in the limits of wide and narrow junctions. Two types of phenomena determine the reflectance, the cavity resonances within the junction and the capacitive coupling between the leads. The resonances give rise to alternating strong and weak reflection but are vulnerable to plasmonic damping. The capacitive coupling, which is immune to damping, induces a near perfect plasmon reflection in junctions narrower than $1/10$ of the plasmon wavelength. Our results are important for 2D plasmonic circuits utilizing slot antennas, split gates or nanowire gates. They are also relevant for the implementation of nanoscale terahertz detectors, where optimal light absorption coincides with the maximal junction reflectance.
Localized Surface Plasmon
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Author : Fouad Sabry
language : en
Publisher: One Billion Knowledgeable
Release Date : 2025-03-24
Localized Surface Plasmon written by Fouad Sabry and has been published by One Billion Knowledgeable this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-03-24 with Science categories.
Unlock the transformative potential of Localized Surface Plasmon in the evolving field of Nanoscale Plasmonic Motor technology. This book delves into the intricate interplay between light and nanostructured materials, driving groundbreaking applications in imaging, sensing, catalysis, and energy conversion. Whether you're a professional, researcher, student, or enthusiast, this comprehensive guide equips you with the knowledge to stay ahead in this revolutionary field. Chapters Brief Overview: 1: Localized surface plasmon – Explore the principles governing localized surface plasmon resonances and their role in nanooptics. 2: Surface plasmon – Understand surface plasmons and their ability to confine light at metaldielectric interfaces. 3: Graphene plasmonics – Investigate graphenebased plasmonics for enhanced optical and electronic applications. 4: Plasmonic catalysis – Discover how plasmondriven reactions accelerate chemical transformations at the nanoscale. 5: Plasmonic solar cell – Learn how plasmonics improve solar cell efficiency through lighttrapping mechanisms. 6: Surface plasmon resonance microscopy – Delve into highresolution imaging techniques using plasmonenhanced sensitivity. 7: Plasmonic metamaterial – Study artificially structured materials with extraordinary optical properties. 8: Multiple layered plasmonics – Examine multilayered plasmonic structures for advanced photonic applications. 9: Plasmonic nanolithography – Understand the role of plasmonics in highresolution nanofabrication. 10: Vibrational analysis with scanning probe microscopy – Learn how plasmonics enhance molecular detection. 11: Surface plasmon polariton – Explore wavelike plasmons that propagate along metal surfaces. 12: Nanoruler – Discover nanoscale measurement tools based on plasmonic properties. 13: Plasmon coupling – Understand how nearby plasmons interact to create tunable optical effects. 14: Plasmon – Gain insights into fundamental plasmonic concepts shaping modern nanophotonics. 15: Plasmonics – Investigate how plasmonics bridges physics, chemistry, and engineering for realworld solutions. 16: Colloidal gold – Explore the historical and modern uses of gold nanoparticles in plasmonic applications. 17: Surface plasmon resonance – Learn how resonance phenomena enable advanced biosensing. 18: Plasmonic nanoparticles – Examine the role of engineered nanoparticles in cuttingedge plasmonics. 19: Prashant K. Jain – Highlight the contributions of a leading researcher in plasmonic nanoscience. 20: Surfaceenhanced Raman spectroscopy – Discover how plasmonics amplify molecular vibrational signals. 21: Nanolaser – Understand how plasmonics enable ultracompact laser technologies. This book provides an invaluable resource, distilling complex plasmonic phenomena into accessible insights. With its structured approach and expertlevel discussion, Localized Surface Plasmon is your gateway to mastering nanoscale lightmatter interactions and unlocking the future of plasmonic innovation.
Plasmonics In Chemistry And Biology
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Author : Marc Lamy de la Chapelle
language : en
Publisher: CRC Press
Release Date : 2019-05-13
Plasmonics In Chemistry And Biology written by Marc Lamy de la Chapelle and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05-13 with Science categories.
Over the past decade, plasmonic nanoparticles have been the subject of extensive research, owing to their remarkable optical properties. These properties arise from a collective oscillation of the conductive electrons at the nanoparticle surface under light irradiation, known as localized surface plasmon (LSP). LSP is characterized by (i) a strong absorption and scattering of the light depending on the geometrical parameters of the nanoparticles and (ii) a strong amplification of the local field in the vicinity of the nanoparticles. Quite recently, it was shown that the activation and the initiation of chemical reactions or physical processes can be facilitated using LSP excitation. Such exploitation presents two main advantages: an enhanced yield and a fine control of chemical reactions at the nanoscale. These topics have become very active and are in line with molecular plasmonics. This book explores this new field and provides a broad view on the exploitation of plasmonics in chemical and biological fields.
Spin Controlled Directional Launching Of Surface Plasmons At The Subwavelength Scale Project Supported By The National Natural Science Foundation Of China Grant Nos 61176120 61378059 60977015 61422501 And 11374023 The National Basic Research Program Of China Grant Nos 2012cb933004 And 2015cb932403 And Beijing Natural Science Foundation Grant No L140007
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Author :
language : en
Publisher:
Release Date : 2016
Spin Controlled Directional Launching Of Surface Plasmons At The Subwavelength Scale Project Supported By The National Natural Science Foundation Of China Grant Nos 61176120 61378059 60977015 61422501 And 11374023 The National Basic Research Program Of China Grant Nos 2012cb933004 And 2015cb932403 And Beijing Natural Science Foundation Grant No L140007 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Abstract: In this paper, we demonstrate a spin-controlled directional launching of surface plasmons at the subwavelength scale. Based on the principle of optical spin's effect for the geometric phase of light, the nanostructures were designed. The inclination of the structures decides the spin-related geometric phase and their relative positions decide the distance-related phase. Hence, the propagation direction of the generated surface plasmon polaritons (SPPs) can be controlled by the spin of photons. Numerical simulations by the finite difference time domain (FDTD) method have verified our theoretical prediction. Our structure is fabricated on the Au film by using a focused ion beam etching technique. The total size of the surface plasmon polariton (SPP) launcher is 320 nm by 180 nm. The observation of the SPP launching by using scanning near-field optical microscopy is in agreement with our theory and simulations. This result may provide a new way of spin-controlled directional launching of SPP.
Manipulation Of Near Field Propagation And Far Field Radiation Of Surface Plasmon Polariton
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Author : Lin Li
language : en
Publisher: Springer
Release Date : 2017-05-29
Manipulation Of Near Field Propagation And Far Field Radiation Of Surface Plasmon Polariton written by Lin Li and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-05-29 with Science categories.
This book mainly focuses on the study of steering electromagnetic fields in near-field and far-field contexts involving plasmonic structures. It also offers a new approach to achieving full control of optical polarizations and potentially boosting the development in photonic information processing. A new in-plane phase modulation method is proposed and described, by means of which a series of optical beams were realized with nanostructures in metal surfaces, such as a plasmonic Airy beam, broad band focusing beam, and demultiplexing, collimated beam, as well as an optical orbital angular momentum (OAM) beam. Further, the book presents a plasmonic polarization generator, which can reconfigure an input polarization to all kinds of states simultaneously.
Active Control Of Surface Plasmons In Hybrid Nanostructures
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Author : Sukanya Randhawa
language : en
Publisher:
Release Date : 2013
Active Control Of Surface Plasmons In Hybrid Nanostructures written by Sukanya Randhawa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Plasmonics nanostructures are becoming remarkably important as tools towards manipulating photons at the nanoscale. They are poised to revolutionize a wide range of applications ranging from integrated optical circuits, photovoltaics, and biosensing. They enable miniaturization of optical components beyond the "diffraction limit'' as they convert optical radiation into highly confined electromagnetic near-fields in the vicinity of subwavelength metallic structures due to excitation of surface plasmons (SPs). These strong electromagnetic fields generated at the plasmonic "hot spots'' raise exciting prospects in terms of driving nonlinear effects in active media. The area of active plasmonics aims at the modulation of SPs supported at the interface of a metal and a nonlinear material by an external control signal. The nonlinear material changes its refractive index under an applied control signal, thereby resulting in an overall altered plasmonic response. Such hybrid nanostructures also allow for the creation of new kinds of hybrid states. This not only provides tools for designing active plasmonic devices, but is also a means of re-examining existing conventional rules of light-matter interactions. Therefore, the need for studying such hybrid plasmonic nanostructures both theoretically and experimentally cannot be understated. The present work seeks to advance and study the control of SPs excited in hybrid systems combining active materials and nanometallics, by an external optical signal or an applied voltage. Different types of plasmonic geometries have been explored via modeling tools such as frequency domain methods, and further investigated experimentally using both near-field and far field techniques such as scanning near field optical microscopy and leakage radiation microscopy respectively. First, passive SP elements were studied, such as the dielectric plasmonic mirrors that demonstrate the ability of gratings made of dielectric ridges placed on top of flat metal layers to open gaps in the dispersion relation of surface plasmon polaritons (SPPs). The results show very good reflecting properties of these mirrors for a propagating SPP whose wavelength is inside the gap. Another passive configuration employed was a plasmonic resonator consisting of dielectric-loaded surface plasmon polariton waveguide ring resonator (WRR). Also, a more robust variant has been proposed by replacing the ring in the WRR with a disk (WDR). The performance in terms of wavelength selectivity and efficiency of the WDRs was evaluated and was shown to be in good agreement with numerical results. Control of SPP signal was demonstrated in the WRR configuration both electro-optically and all-optically. In the case of electro-optical control, the dielectric host matrix was doped with an electro-optical material and combined with an appropriate set of planar electrodes. A 16% relative change of transmission upon application of a controlled electric field was measured. For all-optical control, nonlinearity based on trans-cis isomerization in a polymer material is utilized. More than a 3-fold change between high and low transmission states of the device at milliwatt control powers ( ̃100 W/cm̂2 intensity) was observed. Beyond the active control of propagating surface plasmons, further advancement can be achieved by means of nanoscale plasmonic structures supporting localized surface plasmons (LSP). Interactions of molecular excitations in a pi-conjugated polymer with plasmonic polarizations are investigated in hybrid plasmonic cavities. Insights into the fundamentals of enhanced light-matter interactions in hybrid subwavelength structures with extreme light concentration are drawn, using ultrafast pump-probe spectroscopy. This thesis also gives an overview of the challenges and opportunities that hybrid plasmonic functionalities provide in the field of plasmon nano optics.
Super Resolution Imaging Of Plasmonic Near Fields
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Author : Yuting Miao
language : en
Publisher:
Release Date : 2021
Super Resolution Imaging Of Plasmonic Near Fields written by Yuting Miao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Plasmonic nano-objects have shown great potential in enhancing sensing, energy transfer and computing, and there has been much e↵ort to optimize plasmonic systems and exploit their field enhancement properties. Super-resolution imaging with quantum dots (QDs) is a promising method to probe plasmonic near-fields. However, due to the strong coupling between QDs and plasmons, this technique is hindered by the formation of distorted point spread functions (PSFs) and QD mislocalizations. Chapter 4 of this dissertation investigates the coupling between QDs and 'L-shaped' gold nanostructures, and demonstrates both theoretically and experimentally that this strong coupling can induce polarization- / wavelength-dependent changes to the apparent QD emission intensity, polarization and position. From the magnitude and direction of the PSF shift under emission polarization modulation, the coupling strength can be extracted, and the true PSF location can be back-calculated from tabulated theoretical and experimental values. This discovery helps to better apply super-resolution imaging techniques to detect the plasmonic near-fields.Besides using fluorescence intensity as the local-field intensity indicator, photophysical properties of the emitter (e.g. on-time ratio) have shown to be a great candidate as well. Super-resolution fluctuation imaging (SOFI) has great potential in extracting the photophysical properties of emitters with super-resolution. In chapter 5, I discuss an open-source, modular SOFI analysis package we built for both reconstructing super-resolved plasmonic near-fields and engaging the SOFI community with a wide range of applications. Chapter 6 demonstrates how we characterize the photophysical properties of a specific fluorescent protein suitable for SOFI analysis. Our work provides a practical method with higher precision for plasmonic near-field mapping, which benefits many applications like biosensing and optical quantum computing.
Plasmon Enhanced Light Matter Interactions
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Author : Peng Yu
language : en
Publisher: Springer Nature
Release Date : 2022-03-01
Plasmon Enhanced Light Matter Interactions written by Peng Yu and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-01 with Science categories.
This book highlights cutting-edge research in surface plasmons, discussing the different types and providing a comprehensive overview of their applications. Surface plasmons (SPs) receive special attention in nanoscience and nanotechnology due to their unique optical, electrical, magnetic, and catalytic properties when operating at the nanoscale. The excitation of SPs in metal nanostructures enables the manipulation of light beyond the diffraction limit, which can be utilized for enhancing and tailoring light-matter interactions and developing ultra-compact high-performance nanophotonic devices for various applications. With clear and understandable illustrations, tables, and descriptions, this book provides physicists, materials scientists, chemists, engineers, and their students with a fundamental understanding of surface plasmons and device applications as a basis for future developments.
Plasmonics And Its Applications
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Author : Grégory Barbillon
language : en
Publisher: MDPI
Release Date : 2019-06-05
Plasmonics And Its Applications written by Grégory Barbillon and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-06-05 with Technology & Engineering categories.
Plasmonics is a rapidly developing field that combines fundamental research and applications ranging from areas such as physics to engineering, chemistry, biology, medicine, food sciences, and the environmental sciences. Plasmonics appeared in the 1950s with the discovery of surface plasmon polaritons. Plasmonics then went through a novel propulsion in the mid-1970s, when surface-enhanced Raman scattering was discovered. Nevertheless, it is in this last decade that a very significant explosion of plasmonics and its applications has occurred. Thus, this book provides a snapshot of the current advances in these various areas of plasmonics and its applications, such as engineering, sensing, surface-enhanced fluorescence, catalysis, and photovoltaic devices.