Formation of colorimetric fingerprints on nano-patterned deterministic aperiodic surfaces.
Periodic gratings and photonic bandgap structures have been studied for decades in optical technologies. The translational invariance of periodic gratings gives rise to well-known angular and frequency filtering of the incident radiation resulting in well-defined scattered colors in response to broadband illumination. Here, we demonstrate the formation of highly complex structural color patterns, or colorimetric fingerprints, in two-dimensional (2D) deterministic aperiodic gratings using dark field scattering microscopy. The origin of colorimetric fingerprints is explained by rigorous full-wave numerical simulations based on the generalized Mie theory. We show that unlike periodic gratings, aperiodic nanopatterned surfaces feature a broadband frequency response with wide angular intensity distributions governed by the distinctive Fourier properties of the aperiodic structures. Finally, we will discuss a range of potential applications of colorimetric fingerprints for optical sensing and spectroscopy.
Boriskina
Svetlana V
SV
Department of Electrical and Computer Engineering & Photonic Center, Boston University, 8 St. Mary's St., Boston, MA 02215, USA.
Lee
Sylvanus Y K
SY
Amsden
Jason J
JJ
Omenetto
Fiorenzo G
FG
Dal Negro
Luca
L