Nanolight sources based on resonant excitons of plasmons near a sharp metallic nanostructure have attracted great interest in optical nanoimaging. However, the resonant phenomenon only works for one type of wavelength that resonates with plasmons. Compared to plasmonic resonance, the alternative plasmon nanofocusing method can generate a source of nanolight by propagating and compressing plasmons on a tapered metallic nanostructure, independent of wavelength, due to its reliance on propagation. In a new report on Science Advances, Takayuki Umakoshi and a research team in applied physics and chemistry in Japan generated a white nanolight source spanning across the entire visible light range through plasmon nanofocusing. Using the process, they demonstrated spectral bandgap nanoimaging of carbon nanotubes (CNTs). The experimental demonstration of the source of white nanolight will enable diverse research fields to progress toward next-generation, nanophotonic technologies.
Click here for original story, White nanolight source for optical nanoimaging
Source: Phys.org