Photonic hook: a new sub-wavelength-scale selfbending light beam

2021 ◽  
Author(s):  
Igor Minin ◽  
Yuri Geints ◽  
Pavel Baranov ◽  
Ivan Zatonov ◽  
Cheng-Yang Liu ◽  
...  
Keyword(s):  
Light Beam ◽  
Wavelength Scale ◽  
Sub Wavelength

scholarly journals Observing and controlling a Tamm plasmon at the interface with a metasurface

Nanophotonics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 897-903 ◽  
Author(s):  
Oleksandr Buchnev ◽  
Alexandr Belosludtsev ◽  
Victor Reshetnyak ◽  
Dean R. Evans ◽  
Vassili A. Fedotov
Keyword(s):  
Liquid Crystal ◽  
Metal Film ◽  
Near Infrared ◽  
Thin Metal Film ◽  
Outer Side ◽  
Spectral Position ◽  
External Perturbations ◽  
Dielectric Mirror ◽  
Wavelength Scale ◽  
Sub Wavelength

AbstractWe demonstrate experimentally that Tamm plasmons in the near infrared can be supported by a dielectric mirror interfaced with a metasurface, a discontinuous thin metal film periodically patterned on the sub-wavelength scale. More crucially, not only do Tamm plasmons survive the nanopatterning of the metal film but they also become sensitive to external perturbations as a result. In particular, by depositing a nematic liquid crystal on the outer side of the metasurface, we were able to red shift the spectral position of Tamm plasmon by 35 nm, while electrical switching of the liquid crystal enabled us to tune the wavelength of this notoriously inert excitation within a 10-nm range.

scholarly journals Ultra-high-Q resonances in plasmonic metasurfaces

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
M. Saad Bin-Alam ◽  
Orad Reshef ◽  
Yaryna Mamchur ◽  
M. Zahirul Alam ◽  
Graham Carlow ◽  
...  
Keyword(s):  
Incident Light ◽  
Reducing Power ◽  
Field Enhancement ◽  
Plasmonic Nanostructures ◽  
High Q ◽  
Alternative Material ◽  
Order Of Magnitude ◽  
Wavelength Scale ◽  
Strong Confinement ◽  
Sub Wavelength

AbstractPlasmonic nanostructures hold promise for the realization of ultra-thin sub-wavelength devices, reducing power operating thresholds and enabling nonlinear optical functionality in metasurfaces. However, this promise is substantially undercut by absorption introduced by resistive losses, causing the metasurface community to turn away from plasmonics in favour of alternative material platforms (e.g., dielectrics) that provide weaker field enhancement, but more tolerable losses. Here, we report a plasmonic metasurface with a quality-factor (Q-factor) of 2340 in the telecommunication C band by exploiting surface lattice resonances (SLRs), exceeding the record by an order of magnitude. Additionally, we show that SLRs retain many of the same benefits as localized plasmonic resonances, such as field enhancement and strong confinement of light along the metal surface. Our results demonstrate that SLRs provide an exciting and unexplored method to tailor incident light fields, and could pave the way to flexible wavelength-scale devices for any optical resonating application.

Surface-Plasmons-Assisted Nanoscale Photolithography

2005 ◽  
Author(s):  
Dongbing Shao ◽  
Shaochen Chen
Keyword(s):  
Low Cost ◽  
Near Field ◽  
Optical Diffraction ◽  
Scanning Probe ◽  
Fabrication Technology ◽  
Scanning Probe Lithography ◽  
Low Contrast ◽  
The Past ◽  
Wavelength Scale ◽  
Sub Wavelength

Photolithography has remained a useful micro-fabrication technology because of its high throughput, low cost, simplicity, and reproducibility over the past several decades. However its resolution is limited at a sub-wavelength scale due to optical diffraction. Among all different approaches to overcoming this problem, such as electron-beam lithography, imprint lithography and scanning probe lithography, near-field optical lithography inherits many merits of the traditional photolithography method. Major drawbacks of this approach include low contrast, low transmission and low density.

Engineering light at the sub-wavelength scale using silicon photonics

2011 ◽  
Author(s):  
S. Janz ◽  
P. Cheben ◽  
J. H. Schmid ◽  
P. Bock ◽  
R. Halir ◽  
...  
Keyword(s):  
Silicon Photonics ◽  
Wavelength Scale ◽  
Sub Wavelength

Generation of multiple focal spot and focal hole of sub wavelength scale using phase modulated LG (1,1) beam

Optik ◽  
2013 ◽  
Vol 124 (21) ◽  
pp. 5086-5088 ◽  
Author(s):  
K. Prabakaran ◽  
K.B. Rajesh ◽  
T.V.S. Pillai ◽  
R. Chandrasekaran ◽  
Z. Jaroszewicz
Keyword(s):  
Focal Spot ◽  
Wavelength Scale ◽  
Sub Wavelength

A sub-wavelength scale acoustoelastic sonic crystal for harvesting energies at very low frequencies (<∼1 kHz) using controlled geometric configurations

2016 ◽  
Vol 28 (3) ◽  
pp. 381-391 ◽  
Author(s):  
Riaz Ahmed ◽  
Dylan Madisetti ◽  
Sourav Banerjee
Keyword(s):  
Lead Zirconate Titanate ◽  
Lead Zirconate ◽  
Local Resonance ◽  
Geometric Configurations ◽  
Zirconate Titanate ◽  
Electromechanical Transduction ◽  
Crystal Model ◽  
Sonic Crystal ◽  
Wavelength Scale ◽  
Sub Wavelength

Predictive design to control the geometric configurations of a novel sub-wavelength scale energy scavenger to harvest energy at lower sonic frequencies (<∼1 kHz) is presented. In this work, defying the conventional physics of structural resonance at lower frequencies, the traditional solution of large size harvesters is argued by adopting the physics of local resonance in designing the energy harvesters with sub-wavelength scale foot print. It is reported that during the local resonance, the wave energy passing through the acoustoelastic sonic crystals remains trapped within the soft matrix as the dynamic strain energy; hence, it is proposed to harvest that same trapped energy by strategically embedding the smart materials inside the matrix, capable of electromechanical transduction (e.g. lead zirconate titanate). The proposed acoustoelastic sonic crystal model was able to harvest energies at four different frequencies within <∼1 kHz with possible loading conditions and respective lead zirconate titanate placements. Through experimental validation, a particular acoustoelastic sonic crystal model with sub-wavelength geometry (∼3.65 cm) was investigated. Against 10 kΩ resistive load, a maximum power density of ∼92.4 µW/cm2 was achieved. It is further reported that the geometrical model of the proposed harvesters can be predictively altered while filtering the acoustic waves and harvest the energy, simultaneously.

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