Abstract

A white nano-light-source is an appealing light source that enables us to measure the broadband optical response from a sample at a nano-scale. Generally, nano-light-sources are induced through plasmon resonance by irradiating the apex of a nano-size metal probe, which generates near-field light. Although it has been applied for near-field optical microscopy, it can only be generated for certain wavelength, because it is a resonance phenomenon. Therefore, it is very difficult to generate a broadband near-field-light. Furthermore, in the case of general NSOM, one needs to use lock-in detection due to huge scattering noise caused by incident laser, which also prevents broadband spectroscopic detection.

© 2016 Japan Society of Applied Physics, Optical Society of America