Hybrid plasmonic waveguide for low-loss lightwave guiding.
A hybrid plasmonic waveguide structure is proposed and fabricated for low-loss lightwave guiding along a metal stripe core. By embedding Au stripe in dual slab waveguides with high refractive-index contrast, the field of the guided mode is confined more in the two dielectric core layers. Thus, the propagation loss is significantly reduced. The guided mode is like a combination of a fundamental long-range surface plasmon polariton strip mode and a dual symmetric dielectric slab mode. We fabricate 5 nm-thick Au stripe optical waveguides and measure the optical properties at a wavelength of 1.31 microm. The propagation loss is less than 1.0 dB/cm with the metal stripe width of 1-5 microm.
Kim
Jin Tae
JT
Convergence Components and Materials Research Laboratory, ETRI, Daejeon 305-700, Republic of Korea. jintae@etri.re.kr
Ju
Jung Jin
JJ
Park
Suntak
S
Kim
Min-su
MS
Park
Seung Koo
SK
Shin
Sang-Yung
SY