Details

Autor(en) / Beteiligte

• Tsoi, Stanislav
• Bezares, Francisco J.
• Giles, Alexander
• Long, James P.
• Glembocki, Orest J.
• Caldwell, Joshua D.
• Owrutsky, Jeffrey

Titel

Experimental demonstration of the optical lattice resonance in arrays of Si nanoresonators

Ist Teil von

• Applied physics letters, 2016-03, Vol.108 (11)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2016

Quelle

American Institute of Physics (AIP) Journals

Beschreibungen/Notizen

• Optical resonances of crystalline Si nanopillar arrays on a Si substrate are studied using optical reflectivity and Raman spectroscopy. When the nanopillars are arranged in a two-dimensional lattice, a collective resonance is observed in the reflection spectra which is absent for randomly distributed nanopillars. The resonance is due to coherent oscillations in nanopillars, can be tuned spectrally by the nanopillar diameter and lattice period, and strongly suppresses reflection from the Si surface. Raman scattering demonstrates that the reduced reflectivity is accompanied by increased electromagnetic field confined in Si, thus suggesting potential application of the lattice resonance in surface enhanced spectroscopy and thin film solar cells.