Some Recent Highlights
 
Ultrafast (200-GHz) graphene all-optical modulator

Graphene offers broadband light-matter interactions with ultrafast responses. The bandwidth of previous graphene-based optical modulators were usually limited to ~1 GHz by electric parasite response. Now by using an all-optical scheme, Li et al. show that a graphene-clad microfiber all-optical modulator can achieve a modulation depth of 38% and a response time of ∼2.2 ps, corresponding to a bandwidth of ~200 GHz. This modulator is compatible with current high-speed fiber-optic communication networks and may open the door to meet future demand of ultrafast optical signal processing.
— W. Li et al., Nano Lett. 14, 955-959 (2014). ACS Editor's Choice

Subtle balance in nanowaveguides: loss v.s. confinement

In deep-subwavelength optical nanowires, the waveguiding loss increases with increasing optical confinement, which may also lead to long-wavelength cutoff. Guo et al. pictured subtle balance between loss, confinement and more in a recent article.
— X. Guo et al., Acc. Chem. Res. 47, 656-666 (2014).

Photon-plasmon hybrid nanowire (NW) laser

By near-field coupling a CdSe and a Ag nanowires, Wu et al. demonstrated a hybrid photon-plasmon laser operating at 723 nm wavelength at room temperature, which offers subdiffraction-limited beam size and pure plasmon modes with mode area of 0.008λ2.
— X. Q. Wu et al., Nano Lett. 13, 5654-5659 (2013).
See also highlight in Phys.ORG
"Photon-plasmon nanowire laser offers new opportunities in light manipulation" by Lisa Zyga

70% photon-to-plasmon conversion efficiency in a single Au nanorod

When a Au nanorod is placed inside an optical nanofiber, it can be efficiently excited by the waveguiding mode with photon-to-plasmon conversion efficiency as high as 70%, and is highly potential for realizing ultra-low power nanoparticle plasmonic devices. Check out more details of our Au-nanorod-doped polymer nanofibers.
— P. Wang et al., Nano Lett. 12, 3145-3150 (2012).