Coherent selection of invisible high-order electromagnetic excitations

Ming Lun Tseng, Xu Fang, Vassili Savinov, Pin Chieh Wu, Jun Yu Ou, Nikolay I. Zheludev*, Din Ping Tsai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Far-field spectroscopy and mapping of electromagnetic near-field distribution are the two dominant tools for analysis and characterization of the electromagnetic response in nanophotonics. Despite the widespread use, these methods can fail at identifying weak electromagnetic excitations masked by stronger neighboring excitations. This is particularly problematic in ultrafast nanophotonics, including optical sensing, nonlinear optics and nanolasers, where the broad resonant modes can overlap to a significant degree. Here, using plasmonic metamaterials, we demonstrate that coherent spectroscopy can conveniently isolate and detect such hidden high-order photonic excitations. Our results establish that the coherent spectroscopy is a powerful new tool. It complements the conventional methods for analysis of the electromagnetic response, and provides a new route to designing and characterizing novel photonic devices and materials.

Original languageEnglish
Article number44488
JournalScientific reports
StatePublished - 15 Mar 2017


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