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    • 7. 发明授权
    • Optical waveguide device
    • 光波导器件
    • US07706653B2
    • 2010-04-27
    • US11857262
    • 2007-09-18
    • Suntak ParkSeok Ho SongHyong Sik WonMyung-Hyun LeeJung Jin JuMin-Su KimJin Tae KimSeung Koo Park
    • Suntak ParkSeok Ho SongHyong Sik WonMyung-Hyun LeeJung Jin JuMin-Su KimJin Tae KimSeung Koo Park
    • G02B6/10
    • G02B6/1226B82Y20/00
    • Provided is an optical waveguide device including: a core having a stacked structure of at least three layers in which first thin films having a finite width and thickness and formed of a material having a relatively high electric conductivity and a second thin film having the same width as the first thin films and formed of a material having a lower conductivity than the material forming the first thin films are stacked in sequence, the first thin films being disposed in a first layer and an uppermost layer and adjacent to each other for interaction of surface plasmons; and a clad disposed around the core and formed of a material having a lower conductivity than the material forming the first thin films and a higher refractive index than the material forming the second thin film. The thin metal films of at least two layers having a high electric conductivity in the optical waveguide device can generate a combined surface plasmon mode and propagate the generated surface plasmon mode in the length direction of the thin metal films. Thus, a propagated signal suffers from a smaller propagation loss than a surface plasmon mode supported by a single thin film.
    • 本发明提供一种光波导装置,其特征在于,包括:具有层叠结构的至少3层的芯,其中具有有限宽度和厚度的第一薄膜由具有较高导电性的材料形成,并且具有相同宽度的第二薄膜 因为第一薄膜并且由具有比形成第一薄膜的材料的导电性低的材料形成的材料依次层叠,所以第一薄膜被布置在第一层和最上层中并且彼此相邻以相互作用 等离子体激元 以及围绕芯部设置的包层,其由比形成第一薄膜的材料低的导电性材料形成,并且比形成第二薄膜的材料具有更高的折射率。 在光波导器件中具有高电导率的至少两层的金属薄膜可以产生组合的表面等离子体激元模式,并且在薄金属薄膜的长度方向上传播产生的表面等离子体激元模式。 因此,传播信号比由单个薄膜支持的表面等离子体模式传播损耗更小。