Theoretical fabrication of subwavelength structures by surface plasmon interference based on complementary grating

2022 ◽  
Author(s):  
Xiangxian Wang ◽  
Yaqian Ren ◽  
Tianxu Jia ◽  
Yingwen Su ◽  
Yunping Qi ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Theoretical Study ◽  
Reflectance Spectrum ◽  
Interference Lithography ◽  
Subwavelength Structures ◽  
Optimal Parameters ◽  
One Dimensional ◽  
Sample Rotation ◽  
Rotation Methods ◽  
Difference Time

This paper presents a surface plasmon interference lithography technique based on the complementary grating, which comprises silicon gratings and complementary aluminum grating masks, for fabricating subwavelength structures. In this theoretical study, the optimal parameters of the complementary grating structure were determined using the reflectance spectrum. The optical field distributions of one- and two-dimensional subwavelength structures were obtained using the finite-difference time-domain method and rotation-related formulas. The results of numerical evaluations show that a one-dimensional periodic structure with a half-pitch resolution of 60.5 nm (approximately [Formula: see text]/6.7) can be fabricated. In addition, subwavelength structures can be diversified using different rotation methods to expose the photolithography samples, such as square dot arrays and quasi-hexagonal closely packed structures. The proposed method combines surface plasmon interference with sample rotation, thereby enabling fabrication of abundant subwavelength structures.

Theoretical study of the susceptibility of nearly one-dimensional VF2

1978 ◽  
Vol 27 (11) ◽  
pp. 1079-1081 ◽  
Author(s):  
S. Konishi ◽  
K. Motizuki
Keyword(s):  
Theoretical Study ◽  
One Dimensional

Theoretical study of soliton dynamics of a finite one-dimensional hydrogen-bonded system

1986 ◽  
Vol 107 (2-3) ◽  
pp. 389-396 ◽  
Author(s):  
Yoshiki Kashimori ◽  
Fuchun Chien ◽  
Kichisuke Nishimoto
Keyword(s):  
Theoretical Study ◽  
One Dimensional ◽  
Soliton Dynamics ◽  
Hydrogen Bonded

scholarly journals Spin-filter state of Au-Co nanowires

2018 ◽  
Vol 185 ◽  
pp. 01019
Author(s):  
Ekaterina Smelova ◽  
Kseniya Tsysar ◽  
Alexander Saletsky
Keyword(s):  
Bias Voltage ◽  
Atomic Structure ◽  
Spin Transport ◽  
Theoretical Study ◽  
Transmission Spectra ◽  
Spin Filter ◽  
Quantum Conductance ◽  
One Dimensional ◽  
Control Capability ◽  
Co Nanowires

Our theoretical study reveals the dependence of quantum conductance of Au-Co nanowires on their atomic structure. The results show the emergence of spin-filter state in one-dimensional Au-Co bimetallic nanowires. We found the existence of two transmission regime in Au-Co nanowires with low and high conductivity 1G0 and 2G0 for “zig-zag” and linear nanowire correspondingly. The study of transmission spectra of Au-Co nanowires reveals the control capability of spin transport regime by changing of bias voltage between bulk electrodes.

scholarly journals From Time-Collocated to Leapfrog Fundamental Schemes for ADI and CDI FDTD Methods

Axioms ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 23
Author(s):  
Eng Leong Tan
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Fdtd Method ◽  
Unconditionally Stable ◽  
Alternating Direction Implicit ◽  
One Dimensional ◽  
Alternating Direction ◽  
Fdtd Methods ◽  
Difference Time

The leapfrog schemes have been developed for unconditionally stable alternating-direction implicit (ADI) finite-difference time-domain (FDTD) method, and recently the complying-divergence implicit (CDI) FDTD method. In this paper, the formulations from time-collocated to leapfrog fundamental schemes are presented for ADI and CDI FDTD methods. For the ADI FDTD method, the time-collocated fundamental schemes are implemented using implicit E-E and E-H update procedures, which comprise simple and concise right-hand sides (RHS) in their update equations. From the fundamental implicit E-H scheme, the leapfrog ADI FDTD method is formulated in conventional form, whose RHS are simplified into the leapfrog fundamental scheme with reduced operations and improved efficiency. For the CDI FDTD method, the time-collocated fundamental scheme is presented based on locally one-dimensional (LOD) FDTD method with complying divergence. The formulations from time-collocated to leapfrog schemes are provided, which result in the leapfrog fundamental scheme for CDI FDTD method. Based on their fundamental forms, further insights are given into the relations of leapfrog fundamental schemes for ADI and CDI FDTD methods. The time-collocated fundamental schemes require considerably fewer operations than all conventional ADI, LOD and leapfrog ADI FDTD methods, while the leapfrog fundamental schemes for ADI and CDI FDTD methods constitute the most efficient implicit FDTD schemes to date.

scholarly journals Investigation on Light Extraction Behavior of Surface Plasmon-Coupled Deep-Ultraviolet LED in Different Emission Directions

Crystals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 82
Author(s):  
Mei Ge ◽  
Yi Li ◽  
Youhua Zhu ◽  
Meiyu Wang
Keyword(s):  
Surface Plasmon ◽  
Three Dimensional ◽  
Strong Absorption ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Time Domain Simulation ◽  
Al Nanoparticles ◽  
Extraction Behavior ◽  
Deep Ultraviolet ◽  
Difference Time

The light extraction behavior of an AlGaN-based deep-ultraviolet LED covered with Al nanoparticles (NPs) is investigated by three-dimensional finite-difference time-domain simulation. For the transmission spectra of s- and p-polarizations in different emission directions, the position of maximum transmittance can be changed from (θ = 0°, λ = 273 nm) to (θ = 0°, λ = 286 nm) by increasing the diameter of Al NPs from 40 nm to 80 nm. In the direction that is greater than the critical angle, the transmittance of s-polarization is very small due to the strong absorption of Al NPs, while the transmittance spectrum of p-polarization can be observed obviously for the 80 nm Al NPs structure. For a ~284 nm AlGaN-based LED with surface plasmon (SP) coupling, although the luminous efficiency is significantly improved due to the improvement of the radiation recombination rate as compared with the conventional LED, the light extraction efficiency (LEE) is lower than 2.61% of the conventional LED without considering the lateral surface extraction and bottom reflection. The LEE is not greater than ~0.98% (~2.12%) for an SP coupling LED with 40 nm (80 nm) Al NPs. The lower LEE can be attributed to the strong absorption of Al NPs.

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