Artifact free time resolved near-field spectroscopy

A. J. Sternbach, J. Hinton, T. Slusar, A. S. McLeod, M. K. Liu, A. Frenzel, M. Wagner, R. Iraheta, F. Keilmann, A. Leitenstorfer, M. Fogler, H. T. Kim, R. D. Averitt, D. N. Basov

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


We report on the first implementation of ultrafast near field measurements carried out with the transient pseudoheterodyne detection method (Tr-pHD). This method is well suited for efficient and artifact free pump-probe scattering-type near-field optical microscopy with nanometer scale resolution. The Tr-pHD technique is critically compared to other data acquisition methods and found to offer significant advantages. Experimental evidence for the advantages of Tr-pHD is provided in the near-IR frequency range. Crucial factors involved in achieving proper performance of the Tr-pHD method with pulsed laser sources are analyzed and detailed in this work. We applied this novel method to femtosecond time-resolved and nanometer spatially resolved studies of the photo-induced effects in the insulator-to-metal transition system vanadium dioxide.

Original languageEnglish (US)
Pages (from-to)28589-28611
Number of pages23
JournalOptics Express
Issue number23
StatePublished - Nov 13 2017
Externally publishedYes

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Publisher Copyright:
© 2017 Optical Society of America.


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