Triangular metal wedges for subwavelength plasmon-polariton guiding at telecom wavelengths.
We report on subwavelength plasmon-polariton guiding by triangular metal wedges at telecom wavelengths. A high-quality fabrication procedure for making gold wedge waveguides, which is also mass-production compatible offering large-scale parallel fabrication of plasmonic components, is developed. Using scanning near-field optical imaging at the wavelengths in the range of 1.43-1.52 microm, we demonstrate low-loss (propagation length approximately 120 microm) and well-confined (mode width congruent with 1.3 microm) wedge plasmon-polariton guiding along triangular 6-microm-high and 70.5 degree-angle gold wedges. Experimental observations are consistent with numerical simulations performed with the multiple multipole and finite difference time domain methods.
DTU Fotonik, Department of Photonics Engineering, Nano-DTU, Technical University of Denmark, Building 343, DK-2800 Kongens Lyngby, Denmark. aeb@fotonik.dtu.dk
Alexandra
A
Boltasseva
Valentyn S
VS
Volkov
Rasmus B
RB
Nielsen
Esteban
E
Moreno
Sergio G
SG
Rodrigo
Sergey I
SI
Bozhevolnyi
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006046:Gold / Q000737:chemistry*; D008962:Models, Theoretical; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods; D013685:Telecommunications / Q000295:instrumentation*
D006046:Gold