title: A double-strip plasmonic waveguide coupled to an electrically driven nanowire LED.
abstract: We demonstrate the efficient integration of an electrically driven nanowire (NW) light source with a double-strip plasmonic waveguide. A top-down-fabricated GaAs NW light-emitting diode (LED) is placed between two straight gold strip waveguides with the gap distance decreasing to 30 nm at the end of the waveguide and operated by current injection through the p-contact electrode acting as a plasmonic waveguide. Measurements of polarization-resolved images and spectra show that the light emission from the NW LED was coupled to a plasmonic waveguide mode, propagated through the waveguide, and was focused onto a subwavelength-sized spot of surface plasmon polaritons at the tapered end of the waveguide. Numerical simulation agreed well with these experimental results, confirming that a symmetric plasmonic waveguide mode was excited on the top surface of the waveguide. Our demonstration of a plasmonic waveguide coupled to an electrically driven NW LED represents important progress toward further miniaturization and practical implementation of ultracompact photonic integrated circuits.
authors: Department of Physics, Korea University, Seoul 136-701, Republic of Korea.
authors: You-Shin
authors: YS
authors: No
authors: Jae-Hyuck
authors: JH
authors: Choi
authors: Ho-Seok
authors: HS
authors: Ee
authors: Min-Soo
authors: MS
authors: Hwang
authors: Kwang-Yong
authors: KY
authors: Jeong
authors: Eun-Khwang
authors: EK
authors: Lee
authors: Min-Kyo
authors: MK
authors: Seo
authors: Soon-Hong
authors: SH
authors: Kwon
authors: Hong-Gyu
authors: HG
authors: Park