Mesostructured thin films as photonic crystal building blocks for sensing applications

Nuria Hidalgo; Mauricio E. Calvo; Hernán R. Mìguez

doi:10.1117/12.853732

13 May 2010 Mesostructured thin films as photonic crystal building blocks for sensing applications

Nuria Hidalgo, Mauricio E. Calvo, Hernán R. Mìguez

Proceedings Volume 7713, Photonic Crystal Materials and Devices IX; 77131I (2010) https://doi.org/10.1117/12.853732
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

One-dimensional photonic crystals (1DPC) made by sequential deposition of TiO₂ and SiO₂ dense thin films can be used as environmental sensors by incorporating some responsive coating capable of selectively capturing the targeted molecules. The material chosen is a porous TiO₂ mesostructured thin film with a narrow pore size distribution, which endows it with size selectivity adsorption properties. The deposition of such thin layer onto the dense 1D PC produces a modulation in the reflectance spectrum highly sensitive to modifications of the environment. In order to study the evolution of the optical response with the environmental changes both purely dense and hybrid multilayers were introduced into a close chamber and the partial pressure of the solvent was increased. The optical spectrum of the dense 1DPC remains unaltered by the environmental changes, while the same structure coupled to a designed mesoporous thin film displays clear and gradual modifications of the reflectance spectra when the partial vapour pressure is increased. The analysis of these spectra provides well-defined isotherms due to the adsorption and condensation of the vapour onto the pore walls presented in the mesoporous coating. Depending of the size of the pores, which is controlled by synthetic procedures, the condensation of a specific molecule can be prevented, totally different isotherms being attained.

Citation Download Citation

Nuria Hidalgo, Mauricio E. Calvo, and Hernán R. Mìguez "Mesostructured thin films as photonic crystal building blocks for sensing applications", Proc. SPIE 7713, Photonic Crystal Materials and Devices IX, 77131I (13 May 2010); https://doi.org/10.1117/12.853732

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Coating

Photonic crystals

Reflectivity

Thin films

Titanium dioxide

Multilayers

Refractive index

Show All Keywords

Keywords/Phrases

Search In:

Publication Years