Probing the near fields of the super-resolution near-field optical structure

Tsai, Din Ping; Lin, Wei

doi:10.1063/1.1290692

Cited by 107 publications

(78 citation statements)

References 13 publications

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“…Such enhancements play an important role in surfaceenhanced Raman scattering (SERS) [1]. Recently, several works have attracted considerable interest as an alternative to conventional optics in manipulating the properties of light and applications, such as subwavelength optics nanophotonics [2], magneto-optic data storage [3], chemical and biological sensors [4], super-resolution near-field structure [5,6], waveguides for propagating light in nanoscale structures [7], and acting as a key role in the amplification of the Raman signal of molecules adsorbed on metal particles [8].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Analysis of Scattering Field Interactions and Surface Plasmon Resonance in Coupled Silver Nanospheres

Chen

Chau²,

Tsai

2008

Plasmonics

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Scattering field interactions and surface plasmon resonance (SPR) in coupled silver nanospheres are simulated by using the finite-element method, which includes the influences of near-field enhancements of electric field by the particle sizes, separation distances, propagation directions, as well as the polarizations of the incident wave. The proposed structures exhibit a red-and blue-shifted that can be tuned by varying the particle sizes and the separation distances, respectively. Implications for surface-enhance Raman scattering and nano-optics are discussed in threedimensional models. The evolution of SPR and nanophotonic device with the structural variations can be designed in a controlled manner.

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Section: Introductionmentioning

confidence: 99%

Three-Dimensional Analysis of Scattering Field Interactions and Surface Plasmon Resonance in Coupled Silver Nanospheres

Chen

Chau²,

Tsai

2008

Plasmonics

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“…Localized surface plasmons in metallic nanostructures have attracted considerable attention in both theoretical and practical studies for their potential applications in optical images [1], optical storages [2], ultrasensitive chemicals, and biological sensing [3][4][5]. Plasmonic resonance is sustained by the collective oscillations of conducting electrons.…”

Section: Introductionmentioning

confidence: 99%

Plasmonlike resonances in atomic chains: A time-dependent density-functional theory study

et al. 2014

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We studied plasmonlike resonances in one-dimensional (1D) atomic chain systems by using time-dependent density-functional theory (TDDFT) and local density functional theory. Recent TDDFT studies have shown the coexistence of longitudinal and transverses collective plasmonlike resonances in the atomic chains of simple and noble metals. Such atomic chains contain only a few atoms. The induced polarization occurs along the atomic chain in longitudinal mode and perpendicular to the atomic chain in transverse mode. To understand the emergence of plasmonlike resonance in 1D atomic chains better, we studied carbon chains in which plasmonic resonances are not expected to occur. We used TDDFT to study the emergence of collective resonances in various forms of carbon chains, cumulenes C n H 4 , polyynes C n H 2 , and alkenes C n H n+2 . The excitation energy and dipole oscillation strengths of these systems were determined through TDDFT by using the TURBOMOLE package. We determined how collective plasmonlike resonances arise from single-electron excitations when the number of electrons increases as the carbon chain lengthens. The collective excitation behavior is then compared with that of metallic atomic chains. Our TDDFT results showed longitudinal collective modes for cumulenes and polyynes, as well as for finite-length chains. These collective excitations exhibit the same behavior as that of longitudinal "plasmon" previously identified in sodium and silver chains, although polyynes are gapped in the long chain limit. Such longitudinal excitations are absent in alkenes. However, unlike metal atomic chains, carbon chains exhibited no transverse collective mode. The band structure of periodic atomic chains was calculated by using the standard local density functional method. These structures were used to interpret the results and to relate the single-electron excitation to the collective plasmonlike response. Within the one-particle quantum-well picture, the longitudinal mode in the linear atomic chain arises from intraband transition with q = 1, where q is the quantum number of quantum wells. q = 1 intraband transitions can be found in metallic (e.g., Na) chains and in carbon chains (cumulenes and polyynes), such longitudinal collective mode is rather "generic". Meanwhile, the transverse modes of the sodium chains are attributed to interband transitions with an even q (dominated by q = 0), and such transverse collective excitations only form if the allowed q = 0 transitions occur between bands that are parallel to each other. Such bands can be found in simple metals, but not in carbon chains.

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“…Thus, near-field scanning optical microscopy [106][107][108][109][110] forms an image of the sample by its scanning with an ultra sharp tip in the vicinity of the object and collecting the signal point by point. On the other hand, another family of methods based on a virtual light probe instead of a physical tip had also been developed.…”

Section: Relation To Nanophotonics and Conclusionmentioning

confidence: 99%

Nanophotonics for optical super resolution from an information theoretical perspective: a review

2009

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Abstract. Optical super resolution is one of the most applicable as well as scientifically exciting field of optics dealing with imaging and aiming to improve the spatial resolvable capabilities of any imaging system (digital or ophthalmic) without modifying the optical parameters of the imaging lenses or the geometry of the detection array. Recent developments in nanotechnological fabrication capabilities open new doors of possibilities in fulfilling modified and improved super resolving configurations.Fundamental concepts for obtaining super resolved imaging are related with time, angular, wavelength, polarization and gray levels multiplexing. The state of the art in the field of optical super resolution is reviewed while showing its relation with nanophotonics.

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Probing the near fields of the super-resolution near-field optical structure

Cited by 107 publications

References 13 publications

Three-Dimensional Analysis of Scattering Field Interactions and Surface Plasmon Resonance in Coupled Silver Nanospheres

Three-Dimensional Analysis of Scattering Field Interactions and Surface Plasmon Resonance in Coupled Silver Nanospheres

Plasmonlike resonances in atomic chains: A time-dependent density-functional theory study

Nanophotonics for optical super resolution from an information theoretical perspective: a review

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