Journal
SCIENCE
Volume 359, Issue 6381, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aar4003
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Funding
- Singapore MOE Academic Research Fund [MOE2015T2-2-008, MOE2016-T3-1006]
- Penn State NSF MRSEC Center for Nanoscale Science [NSF DMR-1420620]
- NSF [DMS-1620422, ECCS 1454531, DMR-1420620, ECCS 1757025]
- Packard foundation
- Sloan foundation
- Kaufman foundation
- Israel Science Foundation
- Office of Naval Research [N0001416-1-2640]
- U.S. Air Force Office of Scientific Research [FA9550-14-1-0037]
- U.S.-Israel Binational Science Foundation [2016381]
- German-Israeli Deutsch-Israelische Projektkooperation program
- Army Research Office [W911NF-16-1-0013, W911NF-17-1-0481]
- ERC grant NHQWAVE [MSCA-RISE 691209]
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Topological insulators are phases of matter characterized by topological edge states that propagate in a unidirectional manner that is robust to imperfections and disorder. These attributes make topological insulator systems ideal candidates for enabling applications in quantum computation and spintronics. We propose a concept that exploits topological effects in a unique way: the topological insulator laser. These are lasers whose lasing mode exhibits topologically protected transport without magnetic fields. The underlying topological properties lead to a highly efficient laser, robust to defects and disorder, with single-mode lasing even at very high gain values. The topological insulator laser alters current understanding of the interplay between disorder and lasing, and at the same time opens exciting possibilities in topological physics, such as topologically protected transport in systems with gain. On the technological side, the topological insulator laser provides a route to arrays of semiconductor lasers that operate as one single-mode high-power laser coupled efficiently into an output port.
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