In this Letter, glancing angle deposition is used to form an aluminum-jointed silicon dioxide octagon nanohelix array as a 3D nanostructured thin film. As a sculptured metal–dielectric composite, the film exhibits a complex refractive index of near unity with a small imaginary part. This structured film is demonstrated as an efficient light absorber to absorb light in a broad band and over a wide range of angles for both polarization states.
© 2014 Optical Society of America
Original Manuscript: April 28, 2014
Manuscript Accepted: April 28, 2014
Published: June 3, 2014
Yi-Jun Jen, Chien-Chi Chen, and Ci-Yao Jheng, "Aluminum-jointed silicon dioxide octagon nanohelix array with desired complex refractive index," Opt. Lett. 39, 3386-3389 (2014)