scholarly journals Variable Optical Attenuator Based on Long-Range Surface Plasmon Polariton Multimode Interference Coupler

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Xiaoqiang Sun ◽  
Ying Xie ◽  
Tong Liu ◽  
Changming Chen ◽  
Fei Wang ◽  
...  
Keyword(s):  
Long Range ◽  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Extinction Ratio ◽  
Multimode Interference ◽  
Optical Interconnection ◽  
Force Microscopy ◽  
Variable Optical Attenuator ◽  
Atomic Force ◽  
Plasmon Polariton

The fabrication and characterization of a thermal variable optical attenuator based on long-range surface plasmon polariton (LRSPP) waveguide with multimode interference architecture were investigated. The surface morphology and waveguide configuration of Au stripe were studied by atomic force microscopy. The fluctuation of refractive index of poly(methyl-methacrylate-glycidyl-methacrylate) polymer cladding was confirmed to be less than3×10-4within 8 h curing at120°C. The end-fire excitation of LRSPP mode guiding at 1550 nm along Au stripe indicated that the extinction ratio of attenuator was about 12 dB at a driving power of 69 mW. The measured optical rise time and fall time are 0.57 and 0.87 ms, respectively. These favorable properties promise potentials of this plasmonic device in the application of optical interconnection.

scholarly journals Influence of the Microstructure and Optical Constants on Plasmonic Properties of Copper Nanolayers

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7292
Author(s):  
Tomasz Rerek ◽  
Beata Derkowska-Zielinska ◽  
Marek Trzcinski ◽  
Robert Szczesny ◽  
Mieczyslaw K. Naparty ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Photoelectron Spectroscopy ◽  
Surface Plasmon Polariton ◽  
Optical Constants ◽  
Localized Surface Plasmon ◽  
Silicon Substrates ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Plasmon Polariton

Copper layers with thicknesses of 12, 25, and 35 nm were thermally evaporated on silicon substrates (Si(100)) with two different deposition rates 0.5 and 5.0 Å/s. The microstructure of produced coatings was studied using atomic force microscopy (AFM) and powder X-ray diffractometer (XRD). Ellipsometric measurements were used to determine the effective dielectric functions <ε˜> as well as the quality indicators of the localized surface plasmon (LSP) and the surface plasmon polariton (SPP). The composition and purity of the produced films were analysed using X-ray photoelectron spectroscopy (XPS).

Extremely high efficient coupling between long range surface plasmon polariton and dielectric waveguide mode

2009 ◽  
Vol 95 (9) ◽  
pp. 091104 ◽  
Author(s):  
Fang Liu ◽  
Ruiyuan Wan ◽  
Yunxiang Li ◽  
Yidong Huang ◽  
Yoshikatsu Miura ◽  
...  
Keyword(s):  
Long Range ◽  
Surface Plasmon ◽  
Dielectric Waveguide ◽  
Surface Plasmon Polariton ◽  
Waveguide Mode ◽  
High Efficient ◽  
Efficient Coupling ◽  
Plasmon Polariton

UV-Written Long-Period Grating Based on Long-Range Surface Plasmon-Polariton Waveguide

2016 ◽  
Vol 28 (6) ◽  
pp. 633-636 ◽  
Author(s):  
Lanting Ji ◽  
Tong Liu ◽  
Guobing He ◽  
Xiaoqiang Sun ◽  
Xibin Wang ◽  
...  
Keyword(s):  
Long Range ◽  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Long Period Grating ◽  
Long Period ◽  
Plasmon Polariton

scholarly journals Long-Range Surface Plasmon-Polariton Waveguide Biosensors for Human Cardiac Troponin I Detection

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 631 ◽  
Author(s):  
Oleksiy Krupin ◽  
Pierre Berini
Keyword(s):  
Long Range ◽  
Surface Plasmon ◽  
Cardiac Troponin ◽  
Surface Plasmon Polariton ◽  
Troponin I ◽  
Biological Marker ◽  
Cardiac Troponin I ◽  
Label Free ◽  
Label Free Detection ◽  
Plasmon Polariton

Straight long-range surface plasmon-polariton (LRSPP) waveguides as biosensors for label-free detection are discussed. The sensors consist of 5-μm-wide 35-nm-thick gold stripes embedded in a low-index optical-grade fluoropolymer (CYTOPTM) with fluidic channels etched to the Au surface of the stripes. This work demonstrates the application of the LRSPP biosensors for the detection of human cardiac troponin I (cTnI) protein. cTnI is a biological marker for acute myocardial infarction (AMI), often referred to as a heart attack, which can be diagnosed by elevated levels of cTnI in patient blood. Direct and sandwich assays were developed and demonstrated over the concentration range from 1 to 1000 ng/mL, yielding detection limits of 430 pg/mL for the direct assay and 28 pg/mL for the sandwich assay (1 standard deviation), the latter being physiologically relevant to the early detection or onset of AMI. In addition, a novel approach for data analysis is proposed, where the analyte response is normalized to the response of the antibody layer.

scholarly journals Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ0 = 850 nm

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2507 ◽  
Author(s):  
Yan Xu ◽  
Fei Wang ◽  
Yang Gao ◽  
Daming Zhang ◽  
Xiaoqiang Sun ◽  
...  
Keyword(s):  
Long Range ◽  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Optical Transmission ◽  
Low Cost ◽  
Refractive Index Sensor ◽  
Optical Wavelength ◽  
Plasmon Polariton ◽  
Lift Off ◽  
Waveguide Sensor

A bulk refractive index sensor based on a straight long-range surface plasmon polariton (LRSPP) waveguide is theoretically designed. The waveguide sensor consists of an Au stripe that is embedded in ultraviolet sensitive polymer SU-8. The geometric parameters are optimized by finite difference eigenmode method at the optical wavelength of 850 nm. The sensitivity of 196 dB/RIU/mm can be obtained with a 1.5 μm wide, 25 nm thick Au stripe waveguide. Straight LRSPP waveguides are fabricated by a double layer lift-off process. Its optical transmission is characterized to experimentally prove the feasibility of the proposed design. This sensor has potential for the realization of a portable, low-cost refractometer.

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