AI Article Synopsis
- * High-resolution optical transmission measurements were conducted with lasers at 488.0 nm for silver and 632.8 nm for gold.
- * Results indicated that slit transmission changes significantly with film thickness, displaying damped oscillations, and increases linearly as slit width expands for a constant film thickness.
Article Abstract
Silver and gold films with thicknesses in the range of 120-450 nm were evaporated onto glass substrates. A sequence of slits with widths varying between 70 and 270 nm was milled in the films using a focused gallium ion beam. We have undertaken high-resolution measurements of the optical transmission through the single slits with 488.0 nm (for Ag) and 632.8 nm (for Au) laser sources aligned to the optical axis of a microscope. Based on the present experimental results, it was possible to observe that (1) the slit transmission is notably affected by the film thickness, which presents a damped oscillatory behavior as the thickness is augmented, and (2) the transmission increases linearly with increasing slit width for a fixed film thickness.
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| http://dx.doi.org/10.1364/AO.50.000G11 | DOI Listing |
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