Kavli Affiliate: Jing Wang
| First 5 Authors: Linghao Huang, Jing Wang, , ,
| Summary:
We study the optical effect of chiral topological superconductors in two
dimensions. The linear optical response from chiral Bogoliubov edge modes in
clean superconductors has in-gap resonances, which is originated from the
transitions within the edge particle-hole pair bands. Interestingly, the number
of resonance peaks is determined by the Bogoliubov-de Gennes Chern number of
topological superconductors. Such a sharply distinctive feature in optical
absorption offers a simple way to distinguish topological superconductors with
different Chern numbers. We further demonstrate that linear optical effect
could probe different topological phases in quantum anomalous Hall
insulator-superconductor junction devices. This finding provides an applicable
method to detect chiral Bogoliubov edge states and is distinguishable from
collective modes in superconductors and possible trivial explanations.
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