Excitation And Superfocusing Of The Radially Polarized Conical Surface Plasmon Polaritons
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Author | : Bayarjargal Narantsatsralt |
Publisher | : |
Total Pages | : |
Release | : 2018 |
Genre | : Polaritons |
ISBN | : |
With our analytical study, we showed the different characteristics of the modes in the tapered region of the fiber based scanning near-field optical (SNOM) tips and their field evolution during the propagation to understand the functionality of the tips. Compared with other types of fiber based SNOM tips, the plasmonic tip, which is a fully metal coated tapered vortex fiber tip, provides an improvement in the field localization at the tip apex and in the conversion efficiency from the far- to near-fields (~ 70%) owing to the superfocusing effect and the resonant coupling process. The superfocusing effect enables the confinement of fields longitudinally and transversally and the enhancement of field amplitude resulting in a strong and highly confined field at the tip apex. We fabricated plasmonic tips by using the vortex fiber, which has double ring cores, and explored experimentally the near-field excitation and detection characteristics of the plasmonic tips. By selectively exciting only the radially polarized fiber mode and analyzing the far-field emission images of the tip apex, we showed that the fundamental radially polarized plasmonic mode, that has the superfocusing capability, is successfully excited. We also probed the plasmonic tip's apex near-field with an annular grating on a planar gold surface. The results showed that the plasmonic tip excites planar SPPs to all radial directions indicating that the field at the tip apex is longitudinally oscillating along the tip axis. Due to this longitudinal field at the apex, the plasmonic tip also detects the longitudinal field in transmission that has been demonstrated by scanning over tightly focused linearly and radially polarized beams. Lastly, we measured the near-field of fluorescent beads with the plasmonic tip and demonstrated that the tip and the longitudinal plasmonic field at its apex act back on the beads improving the absorption of the fluorescent beads and thus the fluorescence emission.
Author | : Ki Young Kim |
Publisher | : BoD – Books on Demand |
Total Pages | : 560 |
Release | : 2012-10-24 |
Genre | : Technology & Engineering |
ISBN | : 9535107976 |
The title of this book, Plasmonics: Principles and Applications, encompasses theory, technical issues, and practical applications which are of interest for diverse classes of the plasmonics. The book is a collection of the contemporary researches and developments in the area of plasmonics technology. It consists of 21 chapters that focus on interesting topics of modeling and computational methods, plasmonic structures for light transmission, focusing, and guiding, emerging concepts, and applications.
Author | : Satoshi Kawata |
Publisher | : Springer Science & Business Media |
Total Pages | : 216 |
Release | : 2001-06-20 |
Genre | : Medical |
ISBN | : 3540415025 |
This up-to-date overview describes in detail the physics of localized surface plasmon polaritons excited near fine metallic structures and the principles of near-field optics and microscopy related to this localized field. It also covers wider fields, from local spectroscopy to atom manipulation.
Author | : Peter Hommelhoff |
Publisher | : John Wiley & Sons |
Total Pages | : 392 |
Release | : 2015-03-09 |
Genre | : Science |
ISBN | : 3527411712 |
Die Autoren geben einen tiefen wie auch umfassenden Überblick über die aktuelle Forschung im Bereich der Attosekunden-Nanophysik, d.h. einem Gebiet der nanoskaligen Festkörpersysteme und der natürlichen Zeitskala von Elektronenbewegungen.
Author | : Bharat Bhushan |
Publisher | : Springer Science & Business Media |
Total Pages | : 1467 |
Release | : 2014-03-13 |
Genre | : Technology & Engineering |
ISBN | : 3642311075 |
Nanomaterials attract tremendous attention in recent researches. Although extensive research has been done in this field it still lacks a comprehensive reference work that presents data on properties of different Nanomaterials. This Handbook of Nanomaterials Properties will be the first single reference work that brings together the various properties with wide breadth and scope.
Author | : |
Publisher | : |
Total Pages | : 198 |
Release | : 2007 |
Genre | : Biosensors |
ISBN | : |
Author | : Stefan Waselikowski |
Publisher | : |
Total Pages | : |
Release | : 2013 |
Genre | : |
ISBN | : |
Abstract: Optimal focusing of surface plasmon polaritons in the center of a metal disc illuminated by radially polarized terahertz pulses is demonstrated. By matching the cylindrical symmetry of the metal structure with the radially polarized terahertz field, surface plasmons are excited along its entire circumference. Constructive interference in the disc center produces a sharp frequency-dependent focal spot well described by a zero-order Bessel function. We map the field distributions on the disc by terahertz (THz) near-field microscopy and compare our results with numerical simulations. For comparison, the behavior of the plasmonic lens under linearly polarized THz illumination is also characterized. The remarkable focusing capabilities of such a plasmonic lens together with its simple structure offer considerable potential for THz sensing and imaging applications
Author | : Stefan Alexander Maier |
Publisher | : Springer Science & Business Media |
Total Pages | : 234 |
Release | : 2007-05-16 |
Genre | : Technology & Engineering |
ISBN | : 0387378251 |
Considered a major field of photonics, plasmonics offers the potential to confine and guide light below the diffraction limit and promises a new generation of highly miniaturized photonic devices. This book combines a comprehensive introduction with an extensive overview of the current state of the art. Coverage includes plasmon waveguides, cavities for field-enhancement, nonlinear processes and the emerging field of active plasmonics studying interactions of surface plasmons with active media.
Author | : Mario Agio |
Publisher | : Cambridge University Press |
Total Pages | : 481 |
Release | : 2013-01-03 |
Genre | : Technology & Engineering |
ISBN | : 1139619608 |
This consistent and systematic review of recent advances in optical antenna theory and practice brings together leading experts in the fields of electrical engineering, nano-optics and nano-photonics, physical chemistry and nanofabrication. Fundamental concepts and functionalities relevant to optical antennas are explained, together with key principles for optical antenna modelling, design and characterisation. Recognising the tremendous potential of this technology, practical applications are also outlined. Presenting a clear translation of the concepts of radio antenna design, near-field optics and field-enhanced spectroscopy into optical antennas, this interdisciplinary book is an indispensable resource for researchers and graduate students in engineering, optics and photonics, physics and chemistry.
Author | : Mark L. Brongersma |
Publisher | : Springer |
Total Pages | : 270 |
Release | : 2007-09-18 |
Genre | : Science |
ISBN | : 1402043333 |
This book discusses a new class of photonic devices, known as surface plasmon nanophotonic structures. The book highlights several exciting new discoveries, while providing a clear discussion of the underlying physics, the nanofabrication issues, and the materials considerations involved in designing plasmonic devices with new functionality. Chapters written by the leaders in the field of plasmonics provide a solid background to each topic.