Photonic crystal-based RGB primary colour optical filter

Singh, Brahm Raj; Rawal, Swati; Sinha, R. K.

doi:10.1080/09500340.2016.1149240

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…3 Based on these optical waveguide outputs filter the three primary colors of the visible range, red (R), green (G) and blue (B). The fabrication of optical waveguides on directional couplers is used to check the propagation characteristics of the designed directional coupler [25]. Transmission of electromagnetic wave propagation that radiates on optical waveguides is analyzed and calculated to confirm the performance of the directional coupler.…”

Section: Resultsmentioning

confidence: 99%

Low-cost fabrication of optical waveguide as directional coupler using CO2 laser cutting

Asnawi¹,

Muntini²,

Pramono³

2018

Proceedings of the International Conference on Science and Technology (ICST 2018)

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Engraving of polymer materials using cutting laser is a popular process in some manufacturing industries. This research presents the manufacture of waveguides channels on polymethyl methacrylate (PMMA) substrate using CO2 cutting laser process. The CO2 laser engraving machine has cost effective and takes less time than other tools in waveguide channels fabrication. In this work, we integrated optical components such as waveguide for directional coupler application using tin oxide which is embedded and interconnected in PMMA substrate. In the fabrication channels waveguide with grafir on PMMA subtrate with 4.2 mW laser power and speed 10 mm/s and then repeated two times. The waveguide channels profile is made with curvature angle variation for branching (17 o , 36 o and 54 o). Characterization of waveguide directional coupler is done by measuring the intensity of the output at each port cross-section of the waveguide directional coupler when given an input beam He-Ne laser (632.8 nm). The results directional coupler fabrication using CO2 laser cutting machine can achieve optimum with a very small loss of 3.3% when compared to the straight waveguide coupler channel. Thus, CO2 laser cutting processing as an optical waveguide fabrication can produce channels on PMMA material more effectively.

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Section: Resultsmentioning

confidence: 99%

Low-cost fabrication of optical waveguide as directional coupler using CO2 laser cutting

Asnawi¹,

Muntini²,

Pramono³

2018

Proceedings of the International Conference on Science and Technology (ICST 2018)

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“…Photonic crystals can also be used to make transmissive filters with a high wavelength selectivity. In this case, two-dimensional or three-dimensional photonic crystals are often used [30,31].…”

Section: Adjusting Spectral Response Of Pcf Using 1d-phcsmentioning

confidence: 99%

Efficient Design Method for Plasmonic Filter for Tuning Spectral Selectivity

2020

Crystals

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Nano-structure-based color technologies have been reported as alternatives for conventional pigment- or dye-based color filters due to their simple design methods and durable characteristics. Since structure-based optical resonances accompany multiple resonance modes, spectral selectivity could be degraded. In this work, a simple and effective design of a plasmonic color filter that combines the plasmonic filter with one-dimensional photonic crystals. The introduced photonic crystal provides a photonic band gap, and it helps in suppressing the undesirable transmission peaks of the plasmonic color filter that originates from higher order resonance modes. Finally, the proposed design achieves high color purity. In addition, the simplicity of the design makes it both suitable for large-area fabrication and cost effective. This work is expected to provide a practical alternative to traditional color filters.

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“…The three primary colors of light (RGB) build a beautiful world. , The color has three main attributes: hue, saturation, and brightness. Different colors can be mixed together to get more intermediate colors.…”

Section: Introductionmentioning

confidence: 99%

Polymer-Stabilized Cholesteric Liquid Crystal Films with Double Reflection Bands Prepared Based on the Competition between Photopolymerization and Photoisomerization

Wang,

Zhao,

et al. 2023

ACS Appl. Mater. Interfaces

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Composite colors have been widely found in nature. Herein, polymer-stabilized cholesteric liquid crystal (PSCLC) films with composite structural colors were prepared through a one-step photopolymerization approach. The CLC mixtures were prepared using a mixture of acrylates and a mixture of two chiral dopants. One of the chiral dopants is polymerizable, and the other one is photoisomerizable. After photopolymerization, the PSCLC films with double Bragg reflection bands were obtained on the surface of a substrate. The competition between the photopolymerization of the acrylates and the photoisomerization of the chiral dopant was proposed to drive the formation of the double reflection bands. Without oxygen inhibition, the polymerization of the acrylates near the substrate surface was carried out. However, due to oxygen inhibition, the polymerization of the acrylates near the air was retarded. Then, the photoisomerization of the chiral dopant was carried out prior to the polymerization of the acrylates. The wavelengths of the double reflection bands were tunable by changing the concentrations of the acrylates and chiral dopants and the polymerization temperature. Colorful patterns with composite structural colors were prepared, which were suitable for decoration and anticounterfeiting.

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Photonic crystal-based RGB primary colour optical filter

Cited by 6 publications

References 14 publications

Low-cost fabrication of optical waveguide as directional coupler using CO2 laser cutting

Low-cost fabrication of optical waveguide as directional coupler using CO2 laser cutting

Efficient Design Method for Plasmonic Filter for Tuning Spectral Selectivity

Polymer-Stabilized Cholesteric Liquid Crystal Films with Double Reflection Bands Prepared Based on the Competition between Photopolymerization and Photoisomerization

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