Plasmonic Color Filters Integrated on a Photodiode Array

Ema, Daisuke; Kanamori, Yoshiaki; Sai, Hitoshi; Hane, Kazuhiro

doi:10.1541/ieejsmas.137.379

Cited by 3 publications

(5 citation statements)

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“…In recent years, a new type of filter-based miniature spectroscope that combines a plasmonic wavelength-selective filter array and a photodiode array has been reported [117,[139][140][141][142][143][144]. A wavelengthselective filter is formed on each photodiode, and spectral information is acquired using the output signal from each photodiode.…”

Section: Miniature Spectroscopic Device Using Metamaterialsmentioning

confidence: 99%

“…In other words, metamaterials are artificial transcendental materials. It is attracting attention as an innovative artificial material that exhibits behavior not found in natural substances and can realize a negative refractive index [94–120]. The unit structures (meta‐atoms/metamolecules) that make up a metamaterial are smaller than the light wavelength and are dispersed or periodically arranged in space and behave as an effective refractive index medium.…”

Section: Application Of Nanophotonic Optical Filtersmentioning

confidence: 99%

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High‐Efficiency Optical Filters Based on Nanophotonics

Kanamori

2021

IEEJ Transactions Elec Engng

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Nanophotonic structures are artificial optical substances composed of structures smaller than incident light wavelengths. For example, it can artificially create a unique refractive index that is not found in substances in the natural world. That is, by designing the shape of the nanophotonic structure, an optical filter device that exhibits an optical response on demand can be realized. Also, we can realize applied devices with useful functions that cannot be realized by substances existing in nature, such as antireflective surfaces with 0% reflectance, wavelength-selective filters with 100% reflectance at specific wavelengths, and filters that shift the resonant wavelength in response to changes in the ambient refractive index. There can be applications to highbrightness light-emitting elements, high-efficiency power generation elements, color filters for full-color high-resolution cameras, miniature spectroscopic systems, high-efficiency biosensors, and so on. In the future, the development of further applications with this technology is widely expected in the fields of information, energy and global environment, and medical care and welfare. This paper describes high-efficiency optical filters based on nanophotonic technologies.

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Section: Miniature Spectroscopic Device Using Metamaterialsmentioning

confidence: 99%

Section: Application Of Nanophotonic Optical Filtersmentioning

confidence: 99%

High‐Efficiency Optical Filters Based on Nanophotonics

Kanamori

2021

IEEJ Transactions Elec Engng

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“…Firstly, their component nanostructures are usually fabricated from dielectric or metallic films with thicknesses in the range of a few hundred nanometers and are therefore not bulky [ 14 , 15 , 16 , 17 ]. Moreover, the operating wavelengths can be simply tuned by varying the size, spacing, and/or period of the nanostructures [ 8 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. Lastly, metasurface-based optical devices have already been described that have smaller optical loss than existing systems.…”

Section: Introductionmentioning

confidence: 99%

“…Plasmonic nanostructures were previously introduced as promising candidates for light filtering applications [ 16 , 18 , 19 , 20 , 21 , 22 , 23 , 25 , 26 , 27 , 28 , 29 , 30 , 51 , 54 ]. Plasmonic behavior emerges in two basic situations [ 55 ].…”

Section: Introductionmentioning

confidence: 99%

Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications

Zheng

Beckett

et al. 2021

Nanomaterials

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Dichroic circular polarizers (DCP) represent an important group of optical filters that transfer only that part of the incident light with the desired polarization state and absorb the remainder. However, DCPs are usually bulky and exhibit significant optical loss. Moreover, the integration of these kinds of DCP devices can be difficult and costly as different compositions of chemicals are needed to achieve the desired polarization status. Circular polarizers based on metasurfaces require only thin films in the order of hundreds of nanometers but are limited by their sensitivity to angle of incidence. Furthermore, few existing solutions offer broadband operation in the visible range. By using computational simulations, this paper proposes and analyses a plasmonic DCP structure operating in the visible, from 400 nm to 700 nm which overcomes these drawbacks. The resulting circular dichroism transmission (CDT) is more than 0.9, and the maximum transmission efficiency is greater than 78% at visible wavelengths. These CDT characteristics are largely independent of angle of incidence up to angles of 80 degrees.

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“…In recent years, novel spectroscopes fabricated by combining plasmonic color filter array and photodiode array have been reported [ 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. A color filter is formed on each photodiode, and spectral information is calculated using output signals obtained from photodiodes.…”

Section: Introductionmentioning

confidence: 99%

Miniature Spectroscopes with Two-Dimensional Guided-Mode Resonant Metal Grating Filters Integrated on a Photodiode Array

2018

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A small spectroscope with 25 color sensors was fabricated by combining metamaterial color filters and Si photodiodes. The metamaterial color filters consisted of guided-mode resonant metal gratings with subwavelength two-dimensional periodic structures. Transmittance characteristics of the color filters were designed to obtain peak wavelengths proportional to grating periods. For each color sensor, a peak wavelength of the spectral sensitivity could be tuned in the range of visible wavelengths by adjusting each grating period. By performing spectrum reconstruction using Tikhonov regularization, the spectrum of an incident light was obtained from the signal of photodiodes. Several monochromatic lights were made incident on the fabricated device and the spectral characteristics of the incident light were reconstructed from the output signals obtained from the respective color sensors. The peak wavelengths of the reconstructed spectra were in good agreement with the center wavelengths of the monochromatic lights.

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Plasmonic Color Filters Integrated on a Photodiode Array

Cited by 3 publications

References 13 publications

High‐Efficiency Optical Filters Based on Nanophotonics

High‐Efficiency Optical Filters Based on Nanophotonics

Dichroic Circular Polarizers Based on Plasmonics for Polarization Imaging Applications

Miniature Spectroscopes with Two-Dimensional Guided-Mode Resonant Metal Grating Filters Integrated on a Photodiode Array

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