Design and fabrication of silicon-based linear polarizer with multilayer nanogratings operating in infrared region

2017 ◽  
Vol 56 (1) ◽  
pp. 017111 ◽  
Author(s):  
Yu Lin ◽  
Jingpei Hu ◽  
Bing Cao ◽  
Miao Wang ◽  
Chinhua Wang
Keyword(s):  
Infrared Region ◽  
Silicon Based ◽  
Linear Polarizer

scholarly journals Optical Transport Properties of Graphene Surface Plasmon Polaritons in Mid-Infrared Band

Crystals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 354 ◽  
Author(s):  
Yindi Wang ◽  
Hongxia Liu ◽  
Shulong Wang ◽  
Ming Cai ◽  
Lan Ma
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Infrared Region ◽  
Transmission Characteristics ◽  
Infrared Band ◽  
Theoretical Derivation ◽  
Mid Infrared ◽  
Graphene Surface ◽  
Silicon Based ◽  
Plasmon Polaritons

The excellent transmission characteristics of graphene surface plasmon polaritons in mid-infrared band were analyzed and verified effectively through theoretical derivation and soft simulation in this paper. Meanwhile, a sandwich waveguide structure of dielectric–graphene–substrate–dielectric based on graphene surface plasmon polaritons (SPPs) was presented. Simulation results indicate that graphene SPPs show unique properties in the mid-infrared region including ultra-compact mode confinement and dynamic tunability, which allow these SPPs to overcome the defects of metal SPPs and traditional silicon-based optoelectronic devices. Thus, they can be used to manufacture subwavelength devices. The work in this paper lays a theoretical foundation for the application of graphene SPPs in the mid-infrared region.

Synthesis of Silicon Based Opal by Chemical Reduction of Silica Opal

2006 ◽  
Vol 964 ◽  
Author(s):  
Ali E. Aliev ◽  
M. A. O. Royer ◽  
A. A. Zakhidov ◽  
R. H. Baughman
Keyword(s):  
Photonic Crystal ◽  
Elemental Analysis ◽  
Chemical Reduction ◽  
Contrast Ratio ◽  
Infrared Region ◽  
Gas Mixture ◽  
Sem Images ◽  
Long Wavelength ◽  
Dielectric Contrast ◽  
Silicon Based

ABSTRACTBy reduction of SiO2 opal in atmosphere of nitrogen (80%)-helium (15%)-hydrogen (5%) gas mixture at various temperatures we tuned the dielectric contrast ratio and band gap of photonic crystal (PC) up to 10 %. The SEM images dose not show any detectible change in lattice parameters, whereas the elemental analysis shows remarkable decrease of oxygen content. The shift of reflectance spectra toward the long wavelength and increase of transmission in infrared region confirm the redaction of silica and partial transformation to the silicon.

Polarization-Division Interferometry: Far-Infrared Dichroism

1994 ◽  
Vol 48 (11) ◽  
pp. 1410-1418 ◽  
Author(s):  
Prasad L. Polavarapu ◽  
Gang-Chi Chen
Keyword(s):  
Circular Dichroism ◽  
Far Infrared ◽  
Linear Dichroism ◽  
Infrared Region ◽  
Input Beam ◽  
Free Standing ◽  
Reflecting Surfaces ◽  
Infrared Dichroism ◽  
Linear Polarizer ◽  
Circular Dichroïsm

We report the first far-infrared dichroism measurements using a polarization-division interferometer (PDI) developed in our laboratory. This interferometer uses a free-standing wire-grid beamsplitter made of tungsten wires. In conjunction with a linear polarizer in front of the source and two roof-top mirrors (one in each arm of the interferometer), the PDI divides the input beam into two orthogonal linear polarization components, recombines them for interference at the beamsplitter, and directs the output beam at 90° to the direction of the input beam. Light exiting the interferometer is manipulated with far-infrared lenses, to avoid polarization distortions that are inherent to the reflecting surfaces of the mirrors. The performance of the PDI is evaluated by measuring the linear dichroism of oriented PVF2 [poly(vinylidenefluoride) and circular dichroism of α-pinene, camphor, and 3-methylcyclohexanone. The dichroic multiplex advantage (ability to measure dichroism in the entire far-infrared region from a single measurement) and throughput advantage are demonstrated. These measurements establish the utility of the PDI in measuring transmission and linear dichroism spectra simultaneously without the need for any additional components. Additional developments appear necessary to establish the circular dichroism measurements when the magnitudes are less than one part in one thousand.

Silicon Microchannel Array as a Basis of Biosensor Device

2006 ◽  
Vol 915 ◽  
Author(s):  
Alexander Lomzov ◽  
Natalia Vandysheva ◽  
Alexander Bublikov ◽  
Dmitry Pyshnyi ◽  
Sergei Romanov
Keyword(s):  
Dna Hybridization ◽  
Direct Analysis ◽  
Infrared Region ◽  
Uv Spectra ◽  
Optical Methods ◽  
Standard Glass ◽  
Microchannel Array ◽  
Glass Slides ◽  
3D Solid ◽  
Silicon Based

AbstractThis work shows the possibilities of using the silicon-based microchannel array (Si-MCA) as a 3D-solid support of DNA probes and studying of application of optical methods for DNA hybridization direct analysis. It was obtained that amount of immobilized oligodeoxyribonucleotides on the Si-MCA surface is enhanced with lighting of Si-MCA microchannel. The sample of 160 μm thickness succeeded in immobilizing oligonucleotides 40 times as much as the standard glass slides having the same external surface. The application of Si-MCA as a carrier of DNA allows doing direct analysis of nucleic acids in infrared region by the FTIR method that essentially simplifies creation of a biosensor based on the Si-MCA. It is indicated that using of the Si-MCA as a diffraction grating in visible and UV spectra allows simplifying the spectral analysis of biochemical reaction. It was success confidently to distinguish the mediums differing on the refractive index by dn=0.006.

scholarly journals High-conductivity silicon based spectrally selective plasmonic surfaces for sensing in the infrared region

2016 ◽  
Vol 19 (2) ◽  
pp. 025002 ◽  
Author(s):  
K Gorgulu ◽  
A Gok ◽  
M Yilmaz ◽  
K Topalli ◽  
A K Okyay
Keyword(s):  
Infrared Region ◽  
High Conductivity ◽  
Spectrally Selective ◽  
Silicon Based

scholarly journals Design and fabrication of a linear polarizer in the 8–12μm infrared region with multilayer nanogratings

OSA Continuum ◽  
2019 ◽  
Vol 2 (5) ◽  
pp. 1683 ◽  
Author(s):  
Jie Xia ◽  
Zhihao Yuan ◽  
Chuan Wang ◽  
Cun He ◽  
Junjie Guo ◽  
...  
Keyword(s):  
Infrared Region ◽  
Linear Polarizer

Development, Justification, and Applications of a Mid-Infrared Polarization-Division Interferometer

1994 ◽  
Vol 48 (10) ◽  
pp. 1224-1235 ◽  
Author(s):  
Prasad L. Polavarapu ◽  
Gang-Chi Chen ◽  
Stephen Weibel
Keyword(s):  
Circular Dichroism ◽  
Linear Dichroism ◽  
Infrared Region ◽  
Input Beam ◽  
Output Beam ◽  
Mid Infrared ◽  
Oriented Polypropylene ◽  
Reflecting Surfaces ◽  
Linear Polarizer ◽  
Circular Dichroïsm

We report the development of a polarization-division interferometer (PDI) for the mid-infrared region. This interferometer uses a self-designed beamsplitter constructed in-house from a BaF2 polarizer and a matching substrate. In conjunction with a linear polarizer in front of the source and two roof-top mirrors, one in each arm of the interferometer, the PDI divides the input beam into two orthogonal linear polarization components, recombines them for interference at the beamsplitter, and directs the output beam at 90° to the direction of the input beam. Light exiting the interferometer is manipulated entirely with lenses, to avoid polarization distortions that are inherent to the reflecting surfaces of the mirrors. Details of the instrumental design for this mid-infrared PDI are presented. The performance of the PDI is evaluated by measuring the circular dichroism of α-pinene and camphor and the linear dichroism of oriented polypropylene and polystyrene. These measurements establish the utility of the PDI to measure transmission, circular dichroism, and linear dichroism spectra simultaneously without need for any additional components. The dichroic multiplex advantage (ability to measure dichroism in the entire mid-infrared region from a single measurement) and throughput advantage are demonstrated.

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