Manjappa, Manukumara http://orcid.org/0000-0003-3964-1721
Pitchappa, Prakash
Singh, Navab
Wang, Nan
Zheludev, Nikolay I.
Lee, Chengkuo http://orcid.org/0000-0002-8886-3649
Singh, Ranjan http://orcid.org/0000-0001-8068-7428
Article History
Received: 20 November 2017
Accepted: 30 July 2018
First Online: 3 October 2018
Competing interests
: The authors declare no competing interests.