TY - GEN
T1 - Cathodoluminescence study of silver and gold lamellar gratings
AU - Nath, Janardan
AU - Schwarz, Casey
AU - Lin, Yuqing
AU - Smith, Evan
AU - Peale, R. E.
AU - Chernyak, L.
AU - Buchwald, Walter R.
AU - Lee, Jane
PY - 2011
Y1 - 2011
N2 - Cathodo-luminescence spectroscopy is performed on silver and gold lamellar gratings of period 7.5 or 20 microns for a range of grating amplitudes from 0.1 to 4.6 microns. The overall emission spectrum consists of a 400 nm wide band centered at ∼600 nm which depends little on the grating amplitude, metal, or e-beam energy. For the larger grating amplitudes the emission spectrum is periodically modulated as a function of wavelength. Both the strength of the emission envelop and the depth and phase of the modulation depend on grating orientation with respect to the light collection axis, the distance of the excitation spot from the grating, and the distance between the grating and the collection optics. The modulation can be explained as interference of surface emission from grating bars and grooves. The origin of the emission remains unclear, as mechanisms of electron collision with image charge, transition radiation, surface contamination, and inverse photo-electron effect all fail to explain the observed spectrum. This work is relevant to the interpretation of cathodoluminescence studies of surface plasmons on structured metals for nano-photonic applications.
AB - Cathodo-luminescence spectroscopy is performed on silver and gold lamellar gratings of period 7.5 or 20 microns for a range of grating amplitudes from 0.1 to 4.6 microns. The overall emission spectrum consists of a 400 nm wide band centered at ∼600 nm which depends little on the grating amplitude, metal, or e-beam energy. For the larger grating amplitudes the emission spectrum is periodically modulated as a function of wavelength. Both the strength of the emission envelop and the depth and phase of the modulation depend on grating orientation with respect to the light collection axis, the distance of the excitation spot from the grating, and the distance between the grating and the collection optics. The modulation can be explained as interference of surface emission from grating bars and grooves. The origin of the emission remains unclear, as mechanisms of electron collision with image charge, transition radiation, surface contamination, and inverse photo-electron effect all fail to explain the observed spectrum. This work is relevant to the interpretation of cathodoluminescence studies of surface plasmons on structured metals for nano-photonic applications.
KW - Cathodo-luminescence
KW - nano-photonics
KW - Surface Plasmon Polaritons
UR - https://www.scopus.com/pages/publications/79958004687
UR - https://www.scopus.com/pages/publications/79958004687#tab=citedBy
U2 - 10.1117/12.884162
DO - 10.1117/12.884162
M3 - Conference contribution
AN - SCOPUS:79958004687
SN - 9780819486059
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Micro- and Nanotechnology Sensors, Systems, and Applications III
T2 - Micro- and Nanotechnology Sensors, Systems, and Applications III
Y2 - 25 April 2011 through 29 April 2011
ER -