Nanoscale Generation of White Light for Ultrabroadband Nanospectroscopy

• Published in: Nano letters Vol. 18; no. 1; pp. 535 - 539
• Main Authors: Makarov, S. V, Sinev, I. S, Milichko, V. A, Komissarenko, F. E, Zuev, D. A, Ushakova, E. V, Mukhin, I. S, Yu, Y. F, Kuznetsov, A. I, Belov, P. A, Iorsh, I. V, Poddubny, A. N, Samusev, A. K, Kivshar, Yu. S
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 10.01.2018
• Subjects: Nonlinear nanophotonics; nanoparticles; white light emission; near-field microscopy
• ISSN: 1530-6984; 1530-6992; 1530-6992
• DOI: 10.1021/acs.nanolett.7b04542

Achieving efficient localization of white light at the nanoscale is a major challenge due to the diffraction limit, and nanoscale emitters generating light with a broadband spectrum require complicated engineering. Here we suggest a simple, yet highly efficient, nanoscale white-light source based on a hybrid Si/Au nanoparticle with ultrabroadband (1.3–3.4 eV) spectral characteristics. We incorporate this novel source into a scanning-probe microscope and observe broadband spectrum of photoluminescence that allows fast mapping of local optical response of advanced nanophotonic structures with submicron resolution, thus realizing ultrabroadband near-field nanospectroscopy.