Anti-Reflecting Nanostructures - Biomimetic Architectures by Plasma Processing - page 35

Chapter 2

Anti-Relecting Nanostructures

Abhijit Ganguly, a,b Surojit Chattopadhyay, c,d Pradip Kumar Roy, c
Li-Chyong Chen, b and Kuei-Hsien Chen, a,b
a

Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei-106, Taiwan
b

Center for Condensed Matter Sciences, National Taiwan University,
Taipei-106, Taiwan
c

Institute of Biophotonics, National Yang Ming University, Taipei-112, Taiwan
d

Biophotonics and Molecular Imaging Research Center, National Yang Ming University,
Taipei-112, Taiwan
[e-mail]

Anti-reflection (AR) is a natural phenomenon that reduces the
optical reflectivity. AR coatings on the optical surfaces not only
reduce the unwanted loss due to reflection, but also improve the
light-harvesting efficiency in solar cells or photodetectors, or
maximise the optical transmission enhancing the image clarity in
display devices. Researchers have now learned from nature to mimic
the sub-wavelength or gradient-index AR structures observed in
moth's eyes, reducing even over 99% of reflectance in visible (VIS)
spectral region. Efforts are currently on to achieve broader bands
of AR regime, with omnidirectional and polarisation independency.
This review presents selected state-of-the-art AR techniques, and