PHOTOENHANCEMENT ELEMENT

摘要

Provided is a photoenhancement element that obtains a sufficiently high photoenhancement effect. The photoenhancement element comprises: a substrate; a highly reflective layer formed on the substrate; a dielectric layer formed on the highly reflective layer; and an enhanced electromagnetic-field-forming layer formed on the dielectric layer and resulting from numerous metal microparticles. The thickness of the dielectric layer is at least 50 nm. The highly reflective layer is preferably configured from a metal selected from silver, gold, aluminum, and copper, and furthermore, the surface of the highly reflective layer on the dielectric layer side is preferably a rough surface. Also, the enhanced electromagnetic-field-forming layer preferably has a configuration wherein the metal microparticles are arrayed randomly.