Subwavelength nondiffraction beam generated by a plasmonic lens

Lin, Ding Zheng; Chen, Chih‐Hao; Chang, Chin Kai; Cheng, Tsung Dar; Yeh, Chau Shioung; Lee, Chih‐Kung

doi:10.1063/1.2943274

Cited by 24 publications

(19 citation statements)

References 23 publications

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“…In some circumstances, the number of slits and any other kind of aperture mapping a metallic thin layer can be substantially reduced in order to generate a focused beam. One of the first experimental examples we found consists of a subwavelength annular aperture made on a silver film, where the transmitted light of a 442 nm incident laser was focused at several micrometers behind the silver structure at a tiny spot (354 nm), also exhibiting a remarkable depth of focus [16]. The resultant wave field is essentially a quasi-nondiffracting Bessel beam, whose depth of focus and transverse central spot can be tuned by changing the diameter of the subwavelength annular aperture.…”

Section: Fresnel Zone Plate Metalensesmentioning

confidence: 99%

Recent Progress in Far-Field Optical Metalenses

Naserpour¹,

Hashemi²,

Rodríguez³

2017

Metamaterials - Devices and Applications

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In this chapter, a review of the recent advances in optical metalenses is presented, with special emphasis in their experimental implementation. First, the Huygens' principle applied to ultrathin engineered metamaterials is introduced for the purpose of giving curvature to the wavefront of free-space wave fields. Primary designs based on metallic nanoslits and holey screens occasionally with variant width are first examined. Holographic plasmonic lenses are also explored offering a promising route to realize nanophotonic components. More recent metasurfaces based on nano-antenna resonators, either plasmonic or high-index dielectric, are analyzed in detail. Furthermore, 2D material lenses in the scale of a few nanometers enabling the thinnest lenses to date are here considered. Finally, dynamically reconfigurable focusing devices are reported for creating a scenario with new functionalities.

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Section: Fresnel Zone Plate Metalensesmentioning

confidence: 99%

Recent Progress in Far-Field Optical Metalenses

Naserpour¹,

Hashemi²,

Rodríguez³

2017

Metamaterials - Devices and Applications

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“…The newly created system was named a "Sub-wavelength Non-diffracting Beam Laser Writer". Figure 5 shows the research view and development flow of this system [14][15][16][17]. emitted light beam from SAA sample.…”

Section: Roadmap Of Laser Micro-machining Within Ntu Nano-biomems Groupmentioning

confidence: 99%

“…emitted light beam from SAA sample. [13][14][15][16][17] Starting from an optimized Bessel beam, various nano/micro optical configurations were fabricated for laser micro-machining use. At the turn of the century, nano-optics was just starting to emerge and the development of techniques for simulation and fabrication processes was needed to further advance its progress.…”

Section: Roadmap Of Laser Micro-machining Within Ntu Nano-biomems Groupmentioning

confidence: 99%

Interdisciplinary Research Drivers and Serendipity Factor: An Applied Mechanics Perspective on Some Past Application Platforms

Lee

Lai

Chang

et al. 2014

AUSMT

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Abstract:In recent years, academia, research institutes, and industry have placed an increasing emphasis on interdisciplinary research, with a special focus on Applied Mechanics due to its influence on many emerging fields. Leaders in the Applied Mechanics field have emphasized the need to create an appropriate interdisciplinary organization, either through a matrix organization or with a formal organization. This paper reflects on the lessons learned from the inception, rise and evolution of the field of Theoretical & Applied Mechanics at various universities and institutes around the world. In this way, we can obtain a better understanding of the driving forces of one type of interdisciplinary research. Collaboration and competition between the various disciplinary research institutes and the more traditional engineering/applied sciences departments will be discussed. Based on a series of research and development experiences and using Nano-BioMEMS/NEMS, smart structure, and electret application platforms, we discuss the theoretical architectures and corresponding applications to further strengthen our claim that successful interdisciplinary applied science research requires the establishment of strong industries. We also account for an added serendipity factor, which suggests that a prepared, well-trained open mind, connected to other collaborative research efforts, has the ability to seize new opportunities for innovation as they arise. Examples from past research provide suggestions on how to further improve interdisciplinary research. Other factors including the influence of an interdisciplinary organizational structure, collaborative teamwork framework, and the influence of online interaction with an exchange of ideas are also discussed.

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“…Through the last decade a lot of work was devoted to plasmonic focusing devices [2] which are in the form of planar metallic layers with holes, slits or surface corrugations either linear or circular [3][4][5][6][7][8][9][10][11]. Such structures, unlike classical, refractive lenses, concentrate light in a two-step process of photon-plasmon and plasmon-photon couplings.…”

Section: Introductionmentioning

confidence: 99%

Optimization of transmission and focusing properties of plasmonic nanolenses

2011

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We consider two kinds of plasmonic nanolenses which focus radially polarized Laguerre-Gauss beam into subwavelength spot. The first one is free-standing opaque metal layer with concentric grooves on both sides [Phys. Rev. Lett. 102, 183902 (2009)]. The second has slits instead of grooves thus concentric rings have to be integrated with dielectric matrix. Constructive interference of far-field radiation of SPPs scattered on the back side of the lenses gives subwavelength size foci approaching the Rayleigh resolution limit. We investigate transmission and focusing properties of considered metal structures. Choice of appropriate metal such as silver, gold, copper or aluminum strongly affects transmission. Parameters of surface structure determine efficient photon-plasmon coupling and plasmon scattering phenomenon thus influence both transmission and focusing effect. Finally, the choice of dielectric function of surrounding medium gives another degree of freedom to fulfill momentum matching condition for resonant photon-plasmon interaction. In this paper, taking into account the above parameters, we show an optimization procedure, which leads to high transmission, tight focal spot and large focal length of the considered plasmonic nanolenses.

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Subwavelength nondiffraction beam generated by a plasmonic lens

Cited by 24 publications

References 23 publications

Recent Progress in Far-Field Optical Metalenses

Recent Progress in Far-Field Optical Metalenses

Interdisciplinary Research Drivers and Serendipity Factor: An Applied Mechanics Perspective on Some Past Application Platforms

Optimization of transmission and focusing properties of plasmonic nanolenses

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