High performance optical filters based on advanced coupled Sagnac loop waveguide reflector structures

2021 ◽  
Author(s):  
Hamed Arianfard ◽  
Jiayang Wu ◽  
Saulius Juodkazis ◽  
David J. Moss
Keyword(s):  
High Performance ◽  
Optical Filters

scholarly journals Hyperchromatic structural color for perceptually enhanced sensing by the naked eye

2020 ◽  
Vol 117 (48) ◽  
pp. 30107-30117
Author(s):  
Tahmid H. Talukdar ◽  
Bria McCoy ◽  
Sarah K. Timmins ◽  
Taufiquar Khan ◽  
Judson D. Ryckman
Keyword(s):  
High Performance ◽  
Limit Of Detection ◽  
Form Factors ◽  
Optical Filters ◽  
Color Filter ◽  
Structural Color ◽  
Label Free ◽  
Colorimetric Sensing ◽  
Large Area ◽  
Naked Eye

Colorimetric sensors offer the prospect for on-demand sensing diagnostics in simple and low-cost form factors, enabling rapid spatiotemporal inspection by digital cameras or the naked eye. However, realizing strong dynamic color variations in response to small changes in sample properties has remained a considerable challenge, which is often pursued through the use of highly responsive materials under broadband illumination. In this work, we demonstrate a general colorimetric sensing technique that overcomes the performance limitations of existing chromatic and luminance-based sensing techniques. Our approach combines structural color optical filters as sensing elements alongside a multichromatic laser illuminant. We experimentally demonstrate our approach in the context of label-free biosensing and achieve ultrasensitive and perceptually enhanced chromatic color changes in response to refractive index changes and small molecule surface attachment. Using structurally enabled chromaticity variations, the human eye is able to resolve ∼0.1-nm spectral shifts with low-quality factor (e.g., Q ∼ 15) structural filters. This enables spatially resolved biosensing in large area (approximately centimeters squared) lithography-free sensing films with a naked eye limit of detection of ∼3 pg/mm2, lower than industry standard sensors based on surface plasmon resonance that require spectral or angular interrogation. This work highlights the key roles played by both the choice of illuminant and design of structural color filter, and it offers a promising pathway for colorimetric devices to meet the strong demand for high-performance, rapid, and portable (or point-of-care) diagnostic sensors in applications spanning from biomedicine to environmental/structural monitoring.

High-performance and highly stable 03-nm-full-width-at-half-maximum interference optical filters

1994 ◽  
Vol 33 (16) ◽  
pp. 3513 ◽  
Author(s):  
Tomomi Yanagimachi ◽  
Hitoshi Oguri ◽  
Jamshid Nayyer ◽  
Seiichiro Ishihara ◽  
Junichiro Minowa
Keyword(s):  
High Performance ◽  
Optical Filters ◽  
Full Width ◽  
Half Maximum

Rhodamine-doped nanoporous polymer films as high-performance anti-reflection coatings and optical filters

Nanoscale ◽  
2016 ◽  
Vol 8 (40) ◽  
pp. 17675-17685 ◽  
Author(s):  
Tobias Meier ◽  
Santiago D. Solares
Keyword(s):  
Polymer Films ◽  
High Performance ◽  
Optical Filters

scholarly journals Advanced Classical Optical Filters with Three Waveguide Coupled Sagnac Loop Reflectors

2021 ◽  
Author(s):  
Hamed Arianfard ◽  
Jiayang Wu ◽  
Saulius Juodkazis ◽  
David Moss
Keyword(s):  
High Performance ◽  
Structural Parameters ◽  
Spectral Response ◽  
Optical Filters ◽  
Practical Applications ◽  
Design And Optimization ◽  
Fabrication Tolerances ◽  
Spectral Ranges ◽  
The Impact ◽  
Mode Interference

Abstract We theoretically investigate advanced multi-functional integrated photonic filters formed by three waveguide coupled Sagnac loop reflectors (3WC-SLRs). By tailoring the coherent mode interference, the spectral response of the 3WC-SLR resonators is engineered to achieve diverse filtering functions with high performance. These include optical analogues of Fano resonances that yield ultrahigh spectral extinction ratios (ERs) and slope rates, resonance mode splitting with high ERs and low free spectral ranges, and classical Butterworth, Bessel, Chebyshev, and elliptic filters. A detailed analysis of the impact of the structural parameters and fabrication tolerances is provided to facilitate device design and optimization. The requirements for practical applications are also considered. These results theoretically verify the effectiveness of using 3WC-SLR resonators as multi-functional integrated photonic filters for flexible spectral engineering in diverse applications.

scholarly journals Advanced optical filters with coupled Sagnac loop waveguide reflectors

2021 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Optical Filters ◽  
Bandpass Filters ◽  
Resonance Mode ◽  
Fano Resonances ◽  
Mode Splitting ◽  
Silicon Photonic ◽  
Spectral Ranges ◽  
Mode Interference

<p>We present theoretical designs of high performance optical filters in integrated silicon photonic nanowire resonators. We use mode interference in formed by zig-zag waveguide coupled Sagnac loop reflectors (ZWC-SLRs), tailored to achieve diverse filtering functions with good performance. These include compact bandpass filters with improved roll-off, optical analogues of Fano resonances with ultrahigh spectral extinction ratios (ERs) and slope rates, and resonance mode splitting with high ERs and low free spectral ranges. The analysis verifies the feasibility of multi-functional integrated photonic filters based on ZWC-SLR resonators for flexible spectral engineering in diverse applications. </p>

Thin Film Materials for Optical Interference Filters

2013 ◽  
Vol 538 ◽  
pp. 345-348
Author(s):  
A. Kosyachkov ◽  
L. Wang ◽  
J. Anzellotti ◽  
R. Hallock ◽  
C. Hodgson
Keyword(s):  
Thin Film ◽  
High Performance ◽  
Ion Beam ◽  
Optical Filters ◽  
Optical Quality ◽  
Environmental Stability ◽  
Ion Beam Sputtering ◽  
Optical Interference ◽  
Interference Filters ◽  
Optical And Mechanical Properties

Abstract. Microstructural, optical and mechanical properties of oxide and fluoride films are examined. Superior optical quality, durability and environmental stability are achieved for oxides deposited by ion assist reactive ion beam sputtering and thermal evaporation. The materials and deposition techniques are discussed with regards to manufacturing of optical interference filters for near-UV – mid-IR wavelengths. High performance of thin film materials and optical filters is demonstrated.

scholarly journals High performance optical filters in silicon nanowires with coupled Sagnac loop reflectors

2021 ◽  
Author(s):  
hamed Arianfard ◽  
jiayang wu ◽  
saulius juodkazis ◽  
david moss
Keyword(s):  
Silicon Nanowires ◽  
High Performance ◽  
Optical Filters ◽  
Bandpass Filters ◽  
Resonance Mode ◽  
Fano Resonances ◽  
Mode Splitting ◽  
Silicon Photonic ◽  
Spectral Ranges ◽  
Mode Interference

Abstract We present theoretical designs of high performance optical filters in integrated silicon photonic nanowire resonators. We use mode interference in formed by zig-zag waveguide coupled Sagnac loop reflectors (ZWC-SLRs), tailored to achieve diverse filtering functions with good performance. These include compact bandpass filters with improved roll-off, optical analogues of Fano resonances with ultrahigh spectral extinction ratios (ERs) and slope rates, and resonance mode splitting with high ERs and low free spectral ranges. The analysis verifies the feasibility of multi-functional integrated photonic filters based on ZWC-SLR resonators for flexible spectral engineering in diverse applications.

scholarly journals Optical Filters With Coupled Sagnac Loop Waveguide Reflectors

2021 ◽  
Author(s):  
Hamed Arianfard ◽  
Jiayang Wu ◽  
David Moss
Keyword(s):  
High Performance ◽  
Optical Filters ◽  
Bandpass Filters ◽  
Resonance Mode ◽  
Fano Resonances ◽  
Mode Splitting ◽  
Silicon Photonic ◽  
Spectral Ranges ◽  
Mode Interference

We present theoretical designs of high performance optical filters in integrated silicon photonic nanowire resonators. We use mode interference in formed by zig-zag waveguide coupled Sagnac loop reflectors (ZWC-SLRs), tailored to achieve diverse filtering functions with good performance. These include compact bandpass filters with improved roll-off, optical analogues of Fano resonances with ultrahigh spectral extinction ratios (ERs) and slope rates, and resonance mode splitting with high ERs and low free spectral ranges. The analysis verifies the feasibility of multi-functional integrated photonic filters based on ZWC-SLR resonators for flexible spectral engineering in diverse applications.

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