Mechanotunable optical filters based on stretchable silicon nanowire arrays
| Autor: | Yeong Jae Kim, Dongwook Lee, Kyujung Kim, Young Min Song, Il-Suk Kang, Young Jin Yoo, Joo Hwan Ko, Min Hyung Kang, Mi Rim Park, Dong Eun Yoo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
QC1-999 Physics::Optics 02 engineering and technology 010402 general chemistry 01 natural sciences Nanomaterials stretchable optics structural coloration Electrical and Electronic Engineering Silicon nanowires Optical filter Photonic crystal business.industry Physics 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Optoelectronics 0210 nano-technology business Structural coloration photonic crystal silicon nanowire arrays Biotechnology |
| Zdroj: | Nanophotonics, Vol 9, Iss 10, Pp 3287-3293 (2020) |
| ISSN: | 2192-8614 2192-8606 |
| Popis: | Nano-structural optical filters embedded in elastomers having high mechanical tunability provide the geometric degree of freedom for selective light manipulation. The active control of spectral information in typical structural optical filters is highly limited due to the substrate rigidity. Herein, we present mechanochromic transmissive optical filters by employing flexible and stretchable polymer-embedded silicon nanostructures. Si-based nanowire arrays (Si-NWAs) have been introduced to exhibit parametric resonance characteristics by controlling the period and/or diameter. Furthermore, the spectral shift phenomenon by increased diffraction efficiency was observed after the application of a uniaxial tensile force, which depends on the period of Si-NWAs with a large index contrast between the silicon nanowire and elastomer. The strain-sensitive properties of tunable Si-NWAs filters induced by light diffraction were calculated by simulation based on wave optics. The spectral tunability and light filtering features were simply demonstrated by stretching the Si-NWAs’ optical filters. Our proposed structure provides potential opportunities for a wide variety of applications, including dynamic color display, visual strain sensor and anti-counterfeiting. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|