Funding for this research was provided by:
NSF | Directorate for Mathematical & Physical Sciences | Division of Physics (PHY-1207881, PHY-1520915, PHY-1306638, PHY-1520915, PHY-1306638)
U.S. Air Force (FA9550-14-1-0287, FA9550-14-1-0287, FA9550-14-1-0287)
Article History
Received: 19 June 2017
Accepted: 10 July 2018
First Online: 1 August 2018
Competing Interests
: The authors declare no competing interests.