Dai, S.
Ma, Q.
Liu, M. K.
Andersen, T.
Fei, Z. http://orcid.org/0000-0002-0009-0507
Goldflam, M. D.
Wagner, M.
Watanabe, K. http://orcid.org/0000-0003-3701-8119
Taniguchi, T.
Thiemens, M.
Keilmann, F. http://orcid.org/0000-0001-8334-2310
Janssen, G. C. A. M.
Zhu, S-E. http://orcid.org/0000-0002-1817-7811
Jarillo-Herrero, P.
Fogler, M. M.
Basov, D. N.
Article History
Received: 27 January 2015
Accepted: 25 May 2015
First Online: 22 June 2015
Competing interests
: F.K. is one of the cofounders of Neaspec and Lasnix, producer of the s-SNOM and infrared source used in this work. All other authors declare no competing financial interests.