We demonstrate the distinctive optical properties of disordered nanostructures on glass substrates in accordance with changes in the average size of the nanostructures. Dissimilar sizes of nanostructures were fabricated by using different thicknesses of thermally dewetted Ag nanoparticles as etch masks. Unlike a flat glass substrate, the nanostructured glasses (NSGs) show a changed optical characteristic. By increasing the size of the nanostructures, the wavelength of the peak transmittance of about 99% gradually moved from 730 to 2000 nm. To clearly discern the effect of the different sizes of nanostructures, the normalized angle-dependent transmittance spectra of the NSGs were analyzed. Only if the size becomes relatively larger than the wavelength of the incident light are the transmittance spectra more strongly affected by the incident angle as well as by the relative size, rather than by the Fresnel reflection.
© 2012 Optical Society of America
Optics at Surfaces
Original Manuscript: April 18, 2012
Revised Manuscript: July 25, 2012
Manuscript Accepted: July 26, 2012
Published: August 16, 2012
Gyeong Cheol Park, Young Min Song, Eun Kyu Kang, and Yong Tak Lee, "Size-dependent optical behavior of disordered nanostructures on glass substrates," Appl. Opt. 51, 5890-5896 (2012)