Local plasmon photonic transistor

A proposal for a photonic transistor is made and some basic proving experim ents are described. These experiments show that by focusing two laser beams (405 and 635 nm) in one small spot on a high-speed rotating optical disk, a large signal enhancement is observed. It was found that a plasmon interac tion generated between a silver light-scattering center and recorded small marks in the optical disk with a super-resolution near-field structure prod uced the large signal amplification in the spot (<1 mum). A modulated signa l of the blue laser was enhanced by 60 times by controlling the red laser p ower from 1.5 to 3.5 mW. It has been shown that the system has the potentia l to realize all-thin-films photonic transistors by using local plasmon amp lification. (C) 2001 American Institute of Physics.