Nanophotonic and Subwavelength Structures for Sensing and Biosensing

2010 ◽  
pp. 73-106 ◽  
Author(s):  
I. Abdulhalim
Keyword(s):  
Subwavelength Structures

Enhanced Transmission from Visible to Terahertz in ZnTe Crystals with Scalable Subwavelength Structures

2021 ◽  
Author(s):  
Han Sun ◽  
Jianxi Liu ◽  
Ce Zhou ◽  
Wenhui Yang ◽  
Hao Liu ◽  
...  
Keyword(s):  
Subwavelength Structures ◽  
Enhanced Transmission

Merging plasmonics and metamaterials by two-dimensional subwavelength structures

2017 ◽  
Vol 5 (18) ◽  
pp. 4361-4378 ◽  
Author(s):  
Mingbo Pu ◽  
Xiaoliang Ma ◽  
Xiong Li ◽  
Yinghui Guo ◽  
Xiangang Luo
Keyword(s):  
Subwavelength Structures ◽  
Two Dimensional ◽  
New Framework

Functional plasmonic 2D subwavelength structures are reviewed in a new framework of modes exchanging between freely propagating and bound waves.

Improvement of Phase Retardation of Wave Plate with Subwavelength Structures by Heat Treatment

2005 ◽  
Vol 44 (7A) ◽  
pp. 4984-4988 ◽  
Author(s):  
Taisuke Isano ◽  
Yasushi Kaneda ◽  
Takayuki Kadoshima ◽  
Emi Ukaji ◽  
Masahide Sato ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Subwavelength Structures ◽  
Phase Retardation ◽  
Wave Plate

Infrared spectral filters based on guided-mode resonance with subwavelength structures

2013 ◽  
Author(s):  
E. Sakat ◽  
G. Vincent ◽  
P. Ghenuche ◽  
N. Bardou ◽  
S. Collin ◽  
...  
Keyword(s):  
Subwavelength Structures ◽  
Spectral Filters ◽  
Guided Mode ◽  
Infrared Spectral ◽  
Guided Mode Resonance

Sound-transparent anisotropic media for backscattering-immune wave manipulation

2022 ◽  
Author(s):  
Wei-Wei Kan ◽  
Qiu-Yu Li ◽  
Lei Pan
Keyword(s):  
Acoustic Signal ◽  
Acoustic Signals ◽  
Acoustic Medium ◽  
Subwavelength Structures ◽  
Beam Splitting ◽  
Acoustic Parameters ◽  
Straight Path ◽  
Specific Order ◽  
Anisotropic Layers ◽  
Transformation Acoustics

Abstract The scattering behavior of the anisotropic acoustic medium is analyzed to reveal the possibility of routing acoustic signals through the anisotropic layers with no backscattering loss. The sound-transparent effect of such medium is achieved by independently modulating the anisotropic effective acoustic parameters in a specific order, and experimentally observed in a bending waveguide by arranging the subwavelength structures in the bending part according to transformation acoustics. With the properly designed filling structures, the original distorted acoustic field in the bending waveguide is restored as if the wave travels along a straight path. The transmitted acoustic signal is maintained nearly the same as the incident modulated Gaussian pulse. The proposed schemes and the supporting results could be instructive for further acoustic manipulations such as wave steering, cloaking and beam splitting.

Opportunities for enhanced omnidirectional broadband absorption of the solar radiation using deep subwavelength structures

Nano Energy ◽  
2020 ◽  
Vol 70 ◽  
pp. 104553 ◽  
Author(s):  
Ashish Prajapati ◽  
Jordi Llobet ◽  
Mariana Antunes ◽  
Sofia Martins ◽  
Helder Fonseca ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Subwavelength Structures ◽  
Broadband Absorption

scholarly journals A Microlens Super-Surface Film with Regular Graded Circular Hole-Like Subwavelength Structures for Highly Focusing Strength

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 776
Author(s):  
Jinshuang Wu ◽  
Leimengting Zhang ◽  
Yahong Li ◽  
Yixin Zhang ◽  
Bowei Yang ◽  
...  
Keyword(s):  
Circular Hole ◽  
Focal Length ◽  
Surface Film ◽  
Subwavelength Structures ◽  
Lens Array ◽  
Direct Laser ◽  
Short Focal Length ◽  
Micro Lens Array ◽  
Micro Lens ◽  
Sub Wavelength

Using the fact that a sub-wavelength structure exhibits the same thermal expansion coefficient as a micro-lens array, we design a micro-lens super-surface film with regular circular hole-like subwavelength structures to realize the high performances of central highly focusing strength and short focal length. In addition, based on the Fresnel—Kirchhoff diffraction theory, the influences of subwavelength structural period and height on the focusing performance of a micro-lens are analyzed. Furthermore, the finite-difference time-domain method is utilized to optimize the structural parameters. Via direct laser writing and an inductively coupled plasma process, we fabricated a square micro-lens array consisting of a 1000 × 1000 micro-lens unit with a sub-wavelength structure, and the optical focusing performance was measured in the visible light band. Finally, the experimental results indicate that the focal length is decreased to 15 μm, the focal spot central energy is increased by 7.3%, and the light transmission, enhanced via inserting sub-wavelength structures, corresponds to 3%. This proves that the designed micro-lens array with a regular-graded circular hole-like subwavelength structure can achieve central high focusing and a short focal length. This has applications in several fields of wavefront detection and light field imaging systems.

scholarly journals Nonlinear Modulation of Plasmonic Resonances in Graphene-Integrated Triangular Dimers at Terahertz Frequencies

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2466
Author(s):  
Quan Li ◽  
Shuang Wang ◽  
Tai Chen
Keyword(s):  
Strong Field ◽  
Field Enhancement ◽  
Subwavelength Structures ◽  
Plasmonic Resonance ◽  
Nonlinear Conductivity ◽  
Resonance Modes ◽  
Terahertz Frequencies ◽  
Terahertz Sensing ◽  
Nonlinear Modulation ◽  
A Charge

Metamaterials made from artificial subwavelength structures hold great potential in designing functional devices at microwave, terahertz, infrared, and optical frequencies. In this work, we study the active switching effect of the plasmonic resonance modes in triangular dimer (DTD) structure using graphene in the terahertz regime. The sole DTD structure can only support a dipolar bonding dimer plasmonic (BDP) mode, whose field enhancement factor at the gap center can reach 67.4. However, with a metallic junction in the dimer, the BDP mode switches to a charge transfer plasmonic (CTP) mode. When changing the metallic junction to a graphene stripe, an active modulation effect of the CTP mode can be realized by altering the nonlinear conductivity of graphene through strong-field terahertz incidence. The proposed design is quite promising in terahertz sensing, amplitude switching and nonlinear effect enhancement, etc.

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