Infrared perfect absorber and its application as plasmonic sensor.
We experimentally demonstrate a perfect plasmonic absorber at lambda = 1.6 microm. Its polarization-independent absorbance is 99% at normal incidence and remains very high over a wide angular range of incidence around +/-80 degrees. We introduce a novel concept to utilize this perfect absorber as plasmonic sensor for refractive index sensing. This sensing strategy offers great potential to maintain the performance of localized surface plasmon sensors even in nonlaboratory environments due to its simple and robust measurement scheme.
Liu
Na
N
4. Physikalisches Institut, Universitat Stuttgart, Stuttgart, Germany.
Mesch
Martin
M
Weiss
Thomas
T
Hentschel
Mario
M
Giessen
Harald
H