Mid-wave infrared transmittance filters in suspended GaAs subwavelength gratings

2021 ◽  
Vol 119 (3) ◽  
pp. 031103
Author(s):  
Michael Barrow ◽  
Jamie Phillips
Keyword(s):  
Subwavelength Gratings ◽  
Infrared Transmittance

scholarly journals Nano-imprinted subwavelength gratings as polarizing beamsplitters

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Julian Wüster ◽  
Yannick Bourgin ◽  
Patrick Feßer ◽  
Arne Behrens ◽  
Stefan Sinzinger
Keyword(s):  
Nanoimprint Lithography ◽  
Optical Measurement ◽  
Design Method ◽  
Optical Systems ◽  
Surface Metrology ◽  
Measurement Systems ◽  
Common Path ◽  
Dielectric Coatings ◽  
Subwavelength Gratings ◽  
Wide Range

AbstractPolarizing beamsplitters have numerous applications in optical systems, such as systems for freeform surface metrology. They are classically manufactured from birefringent materials or with stacks of dielectric coatings. We present a binary subwavelength-structured form-birefringent diffraction grating, which acts as a polarizing beamsplitter for a wide range of incidence angles −30∘…+30∘. We refine the general design method for such hybrid gratings. We furthermore demonstrate the manufacturing steps with Soft-UV-Nanoimprint-Lithography, as well as the experimental verification, that the structure reliably acts as a polarizing beamsplitter. The experimental results show a contrast in efficiency for TE- and TM-polarization of up to 1:18 in the first order, and 34:1 in the zeroth order. The grating potentially enables us to realize integrated compact optical measurement systems, such as common-path interferometers.

scholarly journals Wollaston prism-like devices based on blazed dielectric subwavelength gratings

2005 ◽  
Vol 13 (25) ◽  
pp. 9941 ◽  
Author(s):  
Riad Haïdar ◽  
Grégory Vincent ◽  
Nicolas Guérineau ◽  
Stéphane Collin ◽  
Sabrina Velghe ◽  
...  
Keyword(s):  
Subwavelength Gratings ◽  
Wollaston Prism

scholarly journals Determination of Maximum Viscosity of Milled Rice Flours Using Near-Infrared Transmittance Spectroscopy.

2001 ◽  
Vol 7 (2) ◽  
pp. 104-109 ◽  
Author(s):  
Naoto Shimizu ◽  
Takashi Yanagisawa ◽  
Hiroshi Okadome ◽  
Hidechika Toyoshima ◽  
Henrik Andren ◽  
...  
Keyword(s):  
Near Infrared ◽  
Milled Rice ◽  
Infrared Transmittance ◽  
Rice Flours

scholarly journals Visible Wavelength Color Filters Using Dielectric Subwavelength Gratings for Backside-Illuminated CMOS Image Sensor Technologies

Nano Letters ◽  
2017 ◽  
Vol 17 (5) ◽  
pp. 3159-3164 ◽  
Author(s):  
Yu Horie ◽  
Seunghoon Han ◽  
Jeong-Yub Lee ◽  
Jaekwan Kim ◽  
Yongsung Kim ◽  
...  
Keyword(s):  
Cmos Image Sensor ◽  
Image Sensor ◽  
Visible Wavelength ◽  
Subwavelength Gratings ◽  
Color Filters ◽  
Backside Illuminated

W-Doped VO2 (M) with Tunable Phase Transition Temperature

2013 ◽  
Vol 320 ◽  
pp. 483-487 ◽  
Author(s):  
Ming Li ◽  
Deng Bing Li ◽  
Jing Pan ◽  
Guang Hai Li
Keyword(s):  
Electron Microscopy ◽  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Variable Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Infrared Transmittance ◽  
Transmission Electron ◽  
Potential Applications

W-doped VO2 (B) nanoneedles were successfully synthesized by solgel combing with hydrothermal treatment, in which the polyethylene glycol (PEG) was used as both surfactant and reducing. The metastable VO2 (B) was completely transformed to thermochromic VO2 (M) after annealing at high purity N2 atmosphere. The DSC results exhibit a strong crystallographic transition, and the phase transition temperature of VO2 (M) can be reduced to about 38 °C by W-doping. Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HR-TEM) were used to characterize the morphology and crystalline structure of the samples. The variable-temperature infrared transmittance spectra of VO2 (M) demonstrate their potential applications in energy saving field.

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