Fabrication and characterization of tunable photonic crystals by filling silica nanoparticles into the PS opals

Y. W. Chung; I. C. Leu; J. H. Lee; M. H. Hon

doi:10.1117/12.614772

12 September 2005 Fabrication and characterization of tunable photonic crystals by filling silica nanoparticles into the PS opals

Y. W. Chung, I. C. Leu, J. H. Lee, M. H. Hon

Author Affiliations +

Proceedings Volume 5926, Tuning the Optical Response of Photonic Bandgap Structures II; 59260H (2005) https://doi.org/10.1117/12.614772
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The self-assembly of monodispersed colloids into an ordered three-dimensional structure, i. e., an opal (colloidal crystal) structure, is routinely employed to fabricate photonic crystals. In this study, high-quality polystyrene (PS) colloidal crystals in large area were fabricated during 24 hours via the capillary-enhanced process. Then, the tunable photonic crystals were formed by incorporating silica nanoparticles of different concentration into the void space via a dipping process. According to Fick's Law, the interstitial space of opal could be completely filled. Thereby, the monodisperse spheres of opal will form core-shell structure. Moreover, increase of silica nanoparticle concentration will result in an increased refractive index of the opal film. The absorptive peak of pure opal is 445nm as measured in UV-Vis spectrum, and the absorptive peak of core-shell opal is 453nm, 463nm and 469nm for suspensions with different concentration of silica nanoparticles of 0.017, 0.122, and 0.244wt%, respectively. Therefore, by using this dipping process to fill the opal film with colloidal nanoparticles, the characteristic absorption wavelength for opal film can be fine-tuned more easily, efficiently and cost effectively than by traditional methods of constructing opal from monodispersed colloids of different diameter.

Citation Download Citation

Y. W. Chung, I. C. Leu, J. H. Lee, and M. H. Hon "Fabrication and characterization of tunable photonic crystals by filling silica nanoparticles into the PS opals", Proc. SPIE 5926, Tuning the Optical Response of Photonic Bandgap Structures II, 59260H (12 September 2005); https://doi.org/10.1117/12.614772

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available