Subwavelength nanocavity for flexible structural transmissive color generation with a wide viewing angle

Kyu Tae Lee, Ji Yun Jang, Sang Jin Park, Chengang Ji, L. Jay Guo, Hui Joon Park

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

We present a high angular tolerant structural coloration based on strong interference effects in a nanocavity patterned at a subwavelength scale on a flexible substrate. The structural colors, fabricated over a large area by nanoimprint lithography, feature a non-iridescent performance over a wide angle of incidence up to 60°, which is of great importance to various applications, such as imaging sensors and colored display systems. In addition to the noniridescence, the transmissive colors of the proposed structure, simply consisting of triple layers, can be tuned with ease by altering a duty cycle of nanostructures, thus enabling the creation of individual RGB colors in a pixel unit via a facile one-step approach. Moreover, it is confirmed that their performances remain unchanged to the 10 mm bending radius condition, and the encapsulation effects of a polymer material on their optical properties are investigated for practical usage. The presented strategy could provide a new avenue for achieving improved efficiency and desired functionality, thereby opening the door to many potential applications, including anti-counterfeit tagging, imaging sensor systems, and color e-paper displays.

Original languageEnglish
Pages (from-to)1489-1495
Number of pages7
JournalOptica
Volume3
Issue number12
DOIs
StatePublished - 20 Dec 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 Optical Society of America.

Keywords

  • Color
  • Fabry-Perot
  • Resonators
  • Subwavelength structures, nanostructures

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