Terahertz lightwave control of non-equilibrium phases and collective modes in multi-band superconductors

Martin Mootz; Ilias E. Perakis; Chirag Vaswani; Din H. Mudiyanselage; Xu Yang; Jigang Wang

doi:10.1117/12.2544430

27 February 2020 Terahertz lightwave control of non-equilibrium phases and collective modes in multi-band superconductors

Martin Mootz, Ilias E. Perakis, Chirag Vaswani, Din H. Mudiyanselage, Xu Yang, Jigang Wang

Author Affiliations +

Proceedings Volume 11278, Ultrafast Phenomena and Nanophotonics XXIV; 112780F (2020) https://doi.org/10.1117/12.2544430
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

A gauge-invariant density matrix approach is presented to describe the non-equilibrium dynamics of multiband superconductors after photo-excitation. The derived gauge-invariant Bloch equations extend the Anderson pseudo-spin precession model by fully incorporating the center-of-mass motion of Cooper pairs. We also describe lightwave propagation effects inside a superconducting film by including the self-consistent interaction of the photo-excited superconducting system with the propagating electromagnetic field inside the superconductor using Maxwell's equations.

Citation Download Citation

Martin Mootz, Ilias E. Perakis, Chirag Vaswani, Din H. Mudiyanselage, Xu Yang, and Jigang Wang "Terahertz lightwave control of non-equilibrium phases and collective modes in multi-band superconductors", Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 112780F (27 February 2020); https://doi.org/10.1117/12.2544430

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