Journal article
Terahertz continuum generation in the LCS (Lieb) lattice
Journal of Physics Communications, Vol.3(10), p.105014
10/31/2019
DOI: 10.1088/2399-6528/ab4fcd
Abstract
Rabi oscillations in two-level Dirac systems have been shown to alter the frequency content of the system's nonlinear response. In particular, when considering Rabi oscillations in a quantum model beyond the semiclassical Boltzmann theory, even harmonics may be generated despite the centrosymmetric nature of these systems. This effect magnifies with increasing excitation intensity. In this work, we extend the Rabi theory to a three-level Dirac system arising from a line-centered-square optical lattice. In this case, the Dirac cones are bisected at the Dirac point by a flat band that persists throughout the Brillioun zone. Due to the presence of this flat band, we expect a significant enhancement of the coupling between Dirac states, resulting in a large increase of the Rabi effects and the associated nonlinearities, leading to continuum generation of terahertz radiation.
Details
- Title: Subtitle
- Terahertz continuum generation in the LCS (Lieb) lattice
- Creators
- Qiutong Jin - University of IowaDavid R Andersen - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of Physics Communications, Vol.3(10), p.105014
- DOI
- 10.1088/2399-6528/ab4fcd
- ISSN
- 2399-6528
- eISSN
- 2399-6528
- Publisher
- IOP Publishing
- Number of pages
- 7
- Language
- English
- Date published
- 10/31/2019
- Academic Unit
- Electrical and Computer Engineering; Physics and Astronomy
- Record Identifier
- 9984197903902771
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