Light modulators and optical apparatuses including the same

摘要

Provided are examples of light modulators and optical apparatuses that may include the light modulators. A light modulator may include a plasmonic nano-antenna and an element for changing plasmon resonance characteristics of the plasmonic nano-antenna. The plasmon resonance characteristics of the plasmonic nano-antenna may be changed due to a change in refractive index of the element, and thus light may be modulated.

主权项

1. A light modulator comprising:
a plasmonic nano-antenna; a refractive index change layer that is disposed adjacent to the plasmonic nano-antenna; and a refractive index changing unit configured to change a refractive index of the refractive index change layer, wherein, in response to the refractive index changing unit changing the refractive index of the refractive index change layer, plasmon resonance characteristics of the plasmonic nano-antenna are changed, and wherein the refractive index changing unit is configured to change the refractive index of the refractive index change layer by selective concentration of negative charge at a predetermined portion of the refractive index change layer.