Optical resonance coupling in compositionally different nanocube–nanosphere heterodimers

2019 ◽  
Vol 43 (18) ◽  
pp. 6959-6964 ◽  
Author(s):  
Mufasila Mumthaz Muhammed ◽  
Junais Habeeb Mokkath
Keyword(s):  
Electromagnetic Field ◽  
Nanometer Scale ◽  
Optical Resonance ◽  
Plasmonic Nanoparticle ◽  
Resonance Coupling ◽  
Optical Applications ◽  
Field Enhancements

Plasmonic nanoparticle dimers with interparticle gap distances (d) in the nanometer scale are able to produce huge electromagnetic field enhancements in the gap region, useful for novel optical applications.

Nanometer-Scale Composite Structures Formed by Simultaneous Oblique Sputter-Deposition of Two Materials from Different Directions

1990 ◽  
Vol 206 ◽  
Author(s):  
Tomoyoshi Motohiro ◽  
Yasuhiko Takeda ◽  
Yoshihide Watanabe ◽  
Shoji Noda
Keyword(s):  
Composite Structures ◽  
Polar Angle ◽  
Sputter Deposition ◽  
Nanometer Scale ◽  
Metal Insulator ◽  
Host Materials ◽  
Oblique Deposition ◽  
Host Structure ◽  
Optical Applications ◽  
Nonlinear Optical Applications

ABSTRACTOblique depositlon(OD) provides an attractive anisotropic structure In nm-scale as a promising host structure to form anisotropic nm-scale composites(ANSC). Among a variety of possible methods to introduce a guest material Into the host structure of OD, we have attempted simultaneous oblique deposition of a guest and a host material from two different directions. The computer simulation for ballistic deposition, which had greatly contributed to the understanding of the morphology evolution in OD, has been carried out again here to design possible ANSC structures and to survey their variations. A typical ANSC structure obtained here is a composite of slender clusters of the guest and the host materials, which can be regarded as an anisotropic version of the well-known isotropic structures of the metal-insulator or semiconductor-insulator cermets for magneto-optical or nonlinear optical applications. This appears when the host and the guest materials are deposited from the directions of the same polar angle of 70° but from the reverse azimuthal directions. In accordance with this result, a specially designed sputtering apparatus has been constructed. Structures and optical anisotropy of the films of several composites' systems such as ZnTe-SiO2 and Cu-SiO2 formed by this apparatus have indicated that our attempt has hit the mark.

scholarly journals Design and study the performance of optical nanoantenna

2019 ◽  
Vol 12 (2) ◽  
pp. 84-89
Author(s):  
Gufran A. Hassan ◽  
Jawad A. Hassan
Keyword(s):  
Computer Simulation ◽  
Intensive Care ◽  
Detection Limit ◽  
Substrate Material ◽  
Nanometer Scale ◽  
Optical Antenna ◽  
Far Field ◽  
Optical Resonance ◽  
S Parameter ◽  
Bow Tie

Recently, the light metallic interaction of nanostructures has grown to be an area of intensive care research due to advances in modern fabrication techniques. Unique effects have been observed in a nanostructure, and their applications have been found in various areas like in the manipulation of light on the nanometer scale. In this paper Nanoantenna has been introduced and invetigated by studing the effect of changing its parameters such as (shape, length, thickness, and the gap distance between two nanostructures) on the response of the nanoantenna (far field directivity, optical resonance frequency, and S-parameter). Here, a bow tie antenna has been chosen and additional parameters have been considered in the simulation, such as antenna thickness and material, and substrate material . The simulations have been generated using computer simulation technology (CST) studio. Optical antenna is performed from a pair of nanoparticles brought in close nearness, these pairs are separated by small gap to make a high electric field in its gap region. This feature can be employed for biosensing or SERS to improve the detection limit and measure the presence of single molecules.

CIRCULAR AND UNI-AXIAL DICHROISM AND BIREFRINGENCE: THE EMERGENCE OF NONLINEAR OPTICAL NMR AND ESR

1991 ◽  
Vol 05 (12) ◽  
pp. 1963-2001 ◽  
Author(s):  
M. W. EVANS
Keyword(s):  
Electromagnetic Field ◽  
Special Reference ◽  
Electric Fields ◽  
Parity Violation ◽  
Nonlinear Optical ◽  
Chemical Physics ◽  
Optical Resonance ◽  
Resonance Effects ◽  
Alternating Electric Fields ◽  
Set Up

The last decade has seen the emergence of new circular and uni-axial, or forward backward, birefringence and dichroism due to magnetic, nonlinear electromagnetic, and under the correct conditions, alternating electric fields. In this review, we explain some of our contributions to this new area of chemical physics, with special reference to fundamental and applied phenomena such as parity violation and nonlinear optical resonance effects set up by various conjugate products of the Maxwellian electromagnetic field.

Confinement Effects in Nanoscale Anodic Alumina Structures on Silicon

2004 ◽  
Vol 854 ◽  
Author(s):  
Patrick J. Griffin ◽  
Robert W. Carpick ◽  
Donald S. Stone
Keyword(s):  
Electron Beam Lithography ◽  
Anodic Aluminum Oxide ◽  
Nanometer Scale ◽  
Porous Structures ◽  
Confinement Effects ◽  
Anodized Aluminum ◽  
Anodic Aluminum ◽  
Self Organized ◽  
Optical Applications ◽  
Semiconducting Substrate

ABSTRACTAnodic aluminum oxide (AAO) has long been considered a viable material for templated growth of nanomaterials for electronic, magnetic and optical applications due to the ability to form self-organized, high aspect-ratio nanochannels. More recently these porous materials have been incorporated with silicon to create a template for nanostructured materials on a semiconducting substrate. However, there has been no investigation into how pore growth is affected by confining the pre-anodized aluminum dimensions to the nanometer scale. We have used electron beam lithography to pattern 200 nm thick aluminum structures on Si with lateral features ranging from 100 nm to several microns in size. Structures consisting of 1 – 10 individual pores 10 – 15 nm in diameter are routinely fabricated. Confinement effects in the narrowest features assist in pore ordering in the porous structures without the use of pre-patterning or a two step anodization.

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