Author details

Hyuntai Kim

Figure 12 illustrates the resultant field pattern nearby the core region for different incident wavelengths, which justifies the spatial beaming characteristics of the out-coupled optical radiation from the CA-MCAFF. It is clearly shown that the L-SPP mode was dominantly generated above the core region, and a fraction of it propagates along the air-metal interface and another fraction was out-coupled into free space. They show different beaming angles with incident wavelength, confirming the WODB characteristics. In particular, for 550 nm, one can see that the incident light was also coupled to the counter-directionally propagating SPP, which has also been denoted by the dash-dotted blue line in Figure 11. The overall out-coupling efficiency for

Throughout this chapter, the author has discussed novel plasmonic structures implemented on various optical fiber platforms. These fiber-optic-based plasmonic devices demonstrated novel features of SPP-based functionality in a compact, flexible, and cost-effective form leveraged by

First, fiberized TA-CMNSs that can produce a low-noise C-SPP hotspot were introduced and discussed. The trench structures were designed based on the MPCM in order to suppress the co-existing NCDL at the hotspot location. Two types of novel TA-CMNSs were designed and investigated: an RT-CMNS was proposed for its simple fabrication procedure, and an APT-CMNS was proposed for maximally exploiting the multipole cancelation effect. Numerical analysis of them verified that the auxiliary trench structure can substantially improve the SNR performance of the CMNS, being capable of producing a low-noise plasmonic hotspot at the center of the whole structure. These schemes will be useful for designing various plasmonic devices that particularly require high SNR characteristics, such as bio-sensing, imaging,

Second, fiberized and fiberizable metal-optical lenses based on the FZP were introduced and discussed, which included an MFZP-OFF and an SPP-MFZP. The former exhibited supervariable focusing with respect to incident wavelength, and the latter had substantially high

WODB was estimated to be as high as 30% [10] for the given CA-MCAFF.

Figure 12. Field magnitude patterns of a specific CA-MCAFF for RGB incidence conditions [10].

5. Conclusion

196 Plasmonics

optical fiber technology.

surface-enhanced Raman spectroscopy, etc.

Address all correspondence to: H.Kim@soton.ac.uk

Optoelectronics Research Centre, University of Southampton, Southampton, United Kingdom
