Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Broadband highly transparent sapphires with biomimetic antireflective compound submicrometer structures for optical and optoelectronic applications

Not Accessible

Your library or personal account may give you access

Abstract

We reported the broadband highly transparent sapphires with biomimetic antireflective compound submicrometer structures (c-SMSs) made of disordered nanocone arrays on closely packed ordered hemispherical submicrometer gratings (o-SMGs). The o-SMGs and nanocones were fabricated using the spin-coated silica spheres and thermally dewetted gold (Au) nanoparticles, respectively, as the etch masks by a dry etching. The silica spheres with an average diameter of 700±10nm were synthesized. The dot-like Au nanoparticles were formed from the Au thin films with different thicknesses by a proper heat treatment. The total and diffuse transmission characteristics of the fabricated c-SMSs on sapphires were investigated at wavelengths of 350–1100 nm, together with theoretical predictions using a rigorous coupled wave analysis simulation. For the c-SMSs with taller and larger nanocone arrays at 7 nm of Au film, an average total transmittance (Tavg) of 90.7% was obtained, exhibiting haze ratios (H) of 33.3 and 26% at λ=525 and 635 nm, respectively. These values were much higher than those of bare sapphire (i.e., Tavg85.4%, H5.4 and 3.7% at λ=525 and 635 nm, respectively). The surface of fabricated c-SMSs also exhibited a strong hydrophilic property with a low water contact angle of 10°.

© 2013 Optical Society of America

Full Article  |  PDF Article
More Like This
Wafer-scale highly-transparent and superhydrophilic sapphires for high-performance optics

Jung Woo Leem and Jae Su Yu
Opt. Express 20(24) 26160-26166 (2012)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved