Flexible High-Color-Purity Structural Color Filters Based on a Higher-Order Optical Resonance Suppression
- Title
- Flexible High-Color-Purity Structural Color Filters Based on a Higher-Order Optical Resonance Suppression
- Author
- 박희준
- Issue Date
- 2019-10
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- SCIENTIFIC REPORTS, v. 9, article no. 14917
- Abstract
- We present flexible transmissive structural color filters with high-color-purity based on a higher-order resonance suppression by inserting an ultrathin absorbing layer in the middle of a cavity. A 3rd order Fabry-Perot (F-P) resonance, which exhibits a narrower bandwidth than a fundamental F-P resonance, is used to produce transmissive colors with an improved color purity. The thin absorbing layer is properly placed at a center of the cavity to highly suppress only a 5th order F-P resonance appearing at a short wavelength range while not affecting the 3rd order F-P resonance for color generation, thus being able to attain the high-color-purity transmissive colors without reducing a transmission efficiency. In addition, angle-insensitive properties are achieved by compensating a net phase shift with a dielectric overlay and using a material with a high refractive index for the cavity medium. Moreover, the transmissive colors on a flexible substrate are demonstrated, presenting that changes in both the resonance wavelength and the transmission efficiency are nearly negligible when the color filters are bent with a bending radius of 5 mm and over 3000 times bending tests. The described approach could pave the way for various applications, such as colored displays, decorative solar panels, and image sensors.
- URI
- https://www.nature.com/articles/s41598-019-51165-1https://repository.hanyang.ac.kr/handle/20.500.11754/154448
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-019-51165-1
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
- Files in This Item:
- Flexible High-Color-Purity Structural Color Filters Based on a Higher-Order Optical Resonance Suppression.pdfDownload
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