Abstract:
We describe an ultra-small structure that produces visible light of varying frequency, from a single metallic layer. In one example, a row of metallic posts are etched or plated on a substrate according to a particular geometry. When a charged particle beam passed close by the row of posts, the posts and cavities between them cooperate to resonate and produce radiation in the visible spectrum (or even higher). A plurality of such rows of different geometries can be etched or plated from a single metal layer such that the charged particle beam will yield different visible light frequencies (i.e., different colors) using different ones of the rows.
Abstract:
A sensor device includes a substrate having first and second regions of first and second conductivity types, respectively. A junction having a band-gap is formed between the first and second regions. A plasmon source generates plasmons having fields. At least a portion of the plasmon source is formed near the junction, and the fields reduce the band-gap to enable a current to flow through the device.