Room temperature electrically pumped topological insulator laser based on quantum spin Hall effect

2021 ◽  
Author(s):  
Jae-Hyuck Choi ◽  
William E. Hayenga ◽  
Yuzhou G. N. Liu ◽  
Midya Parto ◽  
Babak Bahari ◽  
...  
Keyword(s):  
Hall Effect ◽  
Topological Insulator ◽  
Room Temperature ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Quantum Spin Hall Effect ◽  
Electrically Pumped ◽  
Quantum Spin Hall

scholarly journals Robust Room-Temperature Quantum Spin Hall Effect in Methyl-functionalized InBi honeycomb film

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Sheng-shi Li ◽  
Wei-xiao Ji ◽  
Chang-wen Zhang ◽  
Shu-jun Hu ◽  
Ping Li ◽  
...  
Keyword(s):  
Hall Effect ◽  
Room Temperature ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Quantum Spin Hall Effect ◽  
Quantum Spin Hall

scholarly journals Possibility of realizing quantum spin Hall effect at room temperature instanene/Al2O3(0001)

2016 ◽  
Vol 94 (3) ◽  
Author(s):  
Hui Wang ◽  
S. T. Pi ◽  
J. Kim ◽  
Z. Wang ◽  
H. H. Fu ◽  
...  
Keyword(s):  
Hall Effect ◽  
Room Temperature ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Quantum Spin Hall Effect ◽  
Quantum Spin Hall

scholarly journals Room temperature electrically pumped topological insulator lasers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jae-Hyuck Choi ◽  
William E. Hayenga ◽  
Yuzhou G. N. Liu ◽  
Midya Parto ◽  
Babak Bahari ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Room Temperature ◽  
Phase Locking ◽  
Quantum Spin ◽  
Single Frequency ◽  
Laser Array ◽  
Quantum Spin Hall Effect ◽  
Electrically Pumped ◽  
Spatially Extended ◽  
Synthetic Gauge Fields

AbstractTopological insulator lasers (TILs) are a recently introduced family of lasing arrays in which phase locking is achieved through synthetic gauge fields. These single frequency light source arrays operate in the spatially extended edge modes of topologically non-trivial optical lattices. Because of the inherent robustness of topological modes against perturbations and defects, such topological insulator lasers tend to demonstrate higher slope efficiencies as compared to their topologically trivial counterparts. So far, magnetic and non-magnetic optically pumped topological laser arrays as well as electrically pumped TILs that are operating at cryogenic temperatures have been demonstrated. Here we present the first room temperature and electrically pumped topological insulator laser. This laser array, using a structure that mimics the quantum spin Hall effect for photons, generates light at telecom wavelengths and exhibits single frequency emission. Our work is expected to lead to further developments in laser science and technology, while opening up new possibilities in topological photonics.

scholarly journals Tunable quantum spin Hall effect via strain in two-dimensional arsenene monolayer

2016 ◽  
Vol 49 (5) ◽  
pp. 055305 ◽  
Author(s):  
Ya-ping Wang ◽  
Chang-wen Zhang ◽  
Wei-xiao Ji ◽  
Run-wu Zhang ◽  
Ping Li ◽  
...  
Keyword(s):  
Hall Effect ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Two Dimensional ◽  
Quantum Spin Hall Effect ◽  
Quantum Spin Hall

EDGE MAGNETISM AND QUANTUM SPIN HALL EFFECT IN ZIGZAG GRAPHENE NANORIBBON

2013 ◽  
Vol 27 (15) ◽  
pp. 1362011 ◽  
Author(s):  
JUN-WON RHIM ◽  
KYUNGSUN MOON
Keyword(s):  
Electric Field ◽  
Hall Effect ◽  
Graphene Nanoribbon ◽  
Quantum Spin ◽  
Spin Hall Effect ◽  
Nonmonotonic Dependence ◽  
Quantum Spin Hall Effect ◽  
Edge Spin ◽  
Edge Band ◽  
Quantum Spin Hall

We present here a brief review on the remarkable consequences of the flat bands formed at the edges of the Zigzag graphene nanoribbon (ZGNR). The inclusion of the on-site Coulomb interaction is shown to induce the edge spin ferromagnetism, whose spin stiffness demonstrates a nonmonotonic dependence on the lateral electric field. The critical electric field strength corresponds to that of the insulator to half-metal transition. The inclusion of the spin–orbit coupling (SOC) has been believed to generate the quantum spin Hall effect (QSHE) guiding into the interesting new field of topological insulator. By carefully investigating the SOC near the edge, we have shown that the additional σ-edge band gives a marginal perturbation and hence the existence of the QSHE depends on the coupling strength between the π-edge bands and the σ-edge band. We demonstrate that for the charge neutral ZGNR, the QSHE does not occur in the pristine ZGNR, while the hydrogen passivation along the edge may recover the expected feature of the QSHE.

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