Near-field image transfer through a plasmonic nanorod-array

Significant Near Field Enhancement Over Large Volumes Around Metal Nanorods via Strong Coupling of Surface Lattice Resonances and Fabry-Pérot Resonance

10.20944/preprints202201.0103.v1 ◽

2022 ◽

Author(s):

Yunjie Shi ◽

Yuming Dong ◽

Degui Sun ◽

Guangyuan Li

Keyword(s):

Strong Coupling ◽

Near Field ◽

Field Enhancement ◽

Nanorod Array ◽

Strong Light ◽

Diverse Range ◽

Surface Lattice ◽

Coupling System ◽

Fabry Perot ◽

Split Mode

Metal nanoparticles supporting plasmons are widely used to enhance electromagnetic fields, resulting in strong light-matter interactions at the nanoscale in a diverse range of applications. Recently, it has been shown that when metal nanorods are periodically arranged with proper lattice periods, surface lattice resonances (SLRs) can be excited and near fields can be greatly enhanced over extended volumes. In this work, we report significant near field enhancement over even larger volumes by placing the metal nanorod array within a Fabry-Pérot (F-P) microcavity. Results show that taking advantage of strong coupling between the SLR and the photonic F-P resonances, the electric field intensity of the bonding split mode can be enhanced by up to 1935 times, which is about three times of the enhancement of the SLR, and the greatly enhanced field can extend over most of the F-P microcavity. We further show that the F-P resonances of both odd and even orders can strongly couple to the SLR by varying the nanorods position from the middle of the microcavity. We expect that the proposed plasmonic-photonic coupling system will find promising applications in nanolasers, nonlinear optics and sensing.

Download Full-text

Near-field image transfer by magneto-inductive arrays: A modal perspective

Metamaterials ◽

10.1016/j.metmat.2010.11.002 ◽

2011 ◽

Vol 5 (1) ◽

pp. 8-25 ◽

Cited By ~ 7

Author(s):

R.R.A. Syms ◽

E. Shamonina ◽

L. Solymar

Keyword(s):

Near Field ◽

Image Transfer

Download Full-text

Deposited ultra-thin titanium nitride nanorod array as a plasmonic near-perfect light absorber

Scientific Reports ◽

10.1038/s41598-020-79399-4 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Yi-Jun Jen ◽

Kai-Bin Yang ◽

Po-Chun Lin ◽

Meng-Hsun Chung

Keyword(s):

Near Field ◽

Polarized Light ◽

Bottom Layer ◽

Nanorod Array ◽

Light Extinction ◽

Nanorod Arrays ◽

Plasmonic Resonance ◽

Plasmonic Mode ◽

Light Absorber ◽

High Efficient

AbstractThe transmittance, reflectance, and extinctance that correspond to the localized plasmonic resonance within TiN nanorods were investigated. The obliquely deposited TiN nanorod array shows polarization-independent admittance matching to air. Unlike noble metal nanorods, the near-field localized longitudinal and transverse plasmonic resonance of TiN nanorod arrays present polarization-dependent light extinction in the far field. The longitudinal plasmonic mode presents stronger extinction than transverse plasmonic mode. In order to have high efficient light absorption, an ultra-thin two-layered TiN nanorod array was fabricated with orthogonal deposition planes for upper layer and bottom layer to absorb different polarized light energy. The measured spectrum shows broadband and wide-angle light extinction.

Download Full-text

Sub-wavelength Imaging through Metallic Nanorod Array

MRS Proceedings ◽

10.1557/proc-0919-j05-06 ◽

2006 ◽

Vol 919 ◽

Author(s):

Atsushi Ono ◽

Jun-ichi Kato ◽

Satoshi Kawata

Keyword(s):

Imaging System ◽

Near Field ◽

Nanorod Array ◽

Diffraction Limit ◽

Localized Surface Plasmon ◽

Negative Index ◽

Negative Index Material ◽

Frequency Regime ◽

Dipole Sources ◽

Sub Wavelength

AbstractNegative index material is expected to exhibit interesting optical properties. Especially, superlens effect, which is predicted by John B. Pendry in 2000, is very attractive to overcome the diffraction limit in optical imaging [1]. Although there is no negative index material in nature, Pendry numerically suggested that several metals, only dielectric constant is negative at optical frequencies, behave like a superlens under the electrostatic limit and for the p-polarized fields. X. Zhang experimentally demonstrated this superlens effect by constructing nanolithography system with silver thin film in 2005 [2].In this presentation, we newly propose a sub-wavelength imaging system at optical frequency regime in an array of metallic nanorods [3]. The near-field components of dipole sources were plasmonically transferred through the rod array to reproduce the image of the dipoles in the other side.We calculated the field distribution at the different planes of imaging process using the finite-difference time-domain (FDTD) algorithm and found that the spatial resolution was 40 nm, which was much beyond the diffraction-limit and was limited by the array pitch. The typical configuration is a hexagonal arrangement with 40 nm periodicity of silver rods of 50 nm height and 20 nm diameter. The image formation highly depends on the coherence and the polarization of the dipole sources, array pitch, and the source-array distance. The principle of our near-field imaging is based on the longitudinal resonance of the localized surface plasmon along a metallic nanorod. The spectral responses of the device are also investigated.

Download Full-text

Near-field scanning optical microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100144644 ◽

1986 ◽

Vol 44 ◽

pp. 642-643

Author(s):

E. Betzig ◽

A. Harootunian ◽

M. Isaacson ◽

A. Lewis

Keyword(s):

Near Field ◽

Optical Microscope ◽

Visible Radiation ◽

Field Methods ◽

Optical Elements ◽

Optical Region ◽

Order Of Magnitude ◽

Nondestructive Imaging ◽

Scanning Optical Microscopy ◽

Near Field Scanning

In general, conventional methods of optical imaging are limited in spatial resolution by either the wavelength of the radiation used or by the aberrations of the optical elements. This is true whether one uses a scanning probe or a fixed beam method. The reason for the wavelength limit of resolution is due to the far field methods of producing or detecting the radiation. If one resorts to restricting our probes to the near field optical region, then the possibility exists of obtaining spatial resolutions more than an order of magnitude smaller than the optical wavelength of the radiation used. In this paper, we will describe the principles underlying such "near field" imaging and present some preliminary results from a near field scanning optical microscope (NS0M) that uses visible radiation and is capable of resolutions comparable to an SEM. The advantage of such a technique is the possibility of completely nondestructive imaging in air at spatial resolutions of about 50nm.

Download Full-text