@article { ISI:000344836800025,
	title = {Ultra-broadband unidirectional launching of surface plasmon polaritons by a double-slit structure beyond the diffraction limit},
	journal = {Nanoscale},
	volume = {6},
	number = {22},
	year = {2014},
	month = {NOV},
	pages = {13487-13493},
	publisher = {ROYAL SOC CHEMISTRY},
	type = {Article},
	address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND},
	abstract = {Surface-plasmon-polariton (SPP) launchers, which can couple the free space light to the SPPs on the metal surface, are among the key elements for the plasmonic devices and nano-photonic systems. Downscaling the SPP launchers below the diffraction limit and directly delivering the SPPs to the desired subwavelength plasmonic waveguides are of importance for high-integration plasmonic circuits. By designing a submicron double-slit structure with different slit widths, an ultra-broadband (\&gt;330 nm) unidirectional SPP launcher is realized theoretically and experimentally based on the different phase delays of SPPs propagating along the metal surface and the near-field interfering effect. More importantly, the broadband and unidirectional properties of the SPP launcher are still maintained when the slit length is reduced to a subwavelength scale. This can make the launcher occupy only a very small area of},
	issn = {2040-3364},
	doi = {10.1039/c4nr02938k},
	author = {Chen, Jianjun and Sun, Chengwei and Li, Hongyun and Qihuang Gong}
}
