Structural Colors Based on Diamond Metasurface for Information Encryption

Structural Colors Based on Diamond Metasurface for Information Encryption

Advanced Optical Materials

10.1002/adom.202202826

http://dx.doi.org/10.1002/adom.202202826

Jiteng Gu, Yan Liu, Nannan Meng, Vicknesh Sahmuganathan, Sze Chieh Tan, John Sudijono, Jiecong Tang, Eswaranand Venkatasubramanian, Abhijit Mallick, Febiana Tjiptoharson, Soroosh Daqiqeh Rezaei, Siew Lang Teo, Qiang Zhu, Yunjie Chen, Ming Lin, Zhaogang Dong, Kian Ping Loh

Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics

10 January 2023

Gu, J., Liu, Y., Meng, N., Sahmuganathan, V., Tan, S. C., Sudijono, J., Tang, J., Venkatasubramanian, E., Mallick, A., Tjiptoharson, F., Rezaei, S. D., Teo, S. L., Zhu, Q., Chen, Y., Lin, M., Dong, Z., & Loh, K. P. (2023). Structural Colors Based on Diamond Metasurface for Information Encryption. Advanced Optical Materials, 11(6). Portico. https://doi.org/10.1002/adom.202202826

AbstractStructural colors based on dielectric metasurfaces are attractive because of their potential application in next‐generation color printing. However, the commonly used dielectric materials suffer from issues of high light absorption (e.g., Si at blue wavelength) and low resistance to corrosion (e.g., titanium oxide), which greatly limit their application as structural color for information encryption. Here, dielectric‐metasurface‐based structural color constructed on nanocrystalline diamond (NCD) film by using bias enhanced nucleation (BEN) technique is demonstrated. Owing to the formation of highly crystalline diamond by the BEN process, the synthesized NCD film with a thickness of ~500 nm exhibits excellent optical quality with a relatively high refractive index that produces a strong magnetic dipole mode by Mie resonance. To realize the dynamic functionalities of diamond‐metasurface color with high resolution, a periodic array of asymmetric diamond cuboids with high aspect ratio (≈3.1) is fabricated, which produces polarization‐dependent response due to the enhanced Mie resonance. By optimizing the configuration of the diamond‐metasurface system, the color performance is improved with high brightness and a relatively wide gamut. This work demonstrates for the first time that NCD can serve as a robust and highly tunable dielectric platform for application in information encryption.

Publisher Copyright

This research / project is supported by the A*STAR - Applied Materials-NUS Advanced Materials Corporate Lab
Grant Reference no. : I1801E0022

This research / project is supported by the A*STAR - AME Individual Research Grants (IRG)
Grant Reference no. : A20E5c0093

This research / project is supported by the A*STAR - CDA
Grant Reference no. : C210112019

This research / project is supported by the A*STAR - MTC Individual Research Grants (IRG)
Grant Reference no. : M21K2c0116

This is the peer reviewed version of the following article: Gu, J., Liu, Y., Meng, N., Sahmuganathan, V., Tan, S. C., Sudijono, J., Tang, J., Venkatasubramanian, E., Mallick, A., Tjiptoharson, F., Rezaei, S. D., Teo, S. L., Zhu, Q., Chen, Y., Lin, M., Dong, Z., & Loh, K. P. (2023). Structural Colors Based on Diamond Metasurface for Information Encryption. Advanced Optical Materials, 11(6). Portico. https://doi.org/10.1002/adom.202202826, which has been published in final form at doi.org/10.1002/adom.202202826. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

https://oar.a-star.edu.sg/communities-collections/articles/19519

2195-1071

Institute of Materials Research and Engineering