Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers
Semiconductor superlattices are strongly nonlinear media offering several technological challenges associated with the generation of high-frequency Gigahertz radiation and very effective frequency multiplication up to several Terahertzs. However, charge accumulation, traps and interface defects lead...
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2020-07-01
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Online Access: | https://doi.org/10.1515/nanoph-2020-0155 |
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doaj-6c618137b12a4e398d9be53792859d8c2021-09-06T19:20:35ZengDe GruyterNanophotonics2192-86062192-86142020-07-019123941395210.1515/nanoph-2020-0155Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliersApostolakis Apostolos0Pereira Mauro F.1Department of Condensed Matter Theory, Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, 182 21, Prague, Czech RepublicDepartment of Condensed Matter Theory, Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, 182 21, Prague, Czech RepublicSemiconductor superlattices are strongly nonlinear media offering several technological challenges associated with the generation of high-frequency Gigahertz radiation and very effective frequency multiplication up to several Terahertzs. However, charge accumulation, traps and interface defects lead to pronounced asymmetries in the nonlinear current flow, from which high harmonic generation stems. This problem requires a full non-perturbative solution of asymmetric current flow under irradiation, which we deliver in this paper within the Boltzmann-Bloch approach. We investigate the nonlinear output on both frequency and time domains and demonstrate a significant enhancement of even harmonics by tuning the interface quality. Moreover, we find that increasing arbitrarily the input power is not a solution for high nonlinear output, in contrast with materials described by conventional susceptibilities. There is a complex combination of asymmetry and power values leading to maximum high harmonic generation.https://doi.org/10.1515/nanoph-2020-0155asymmetric current flowhigh harmonic generationinterfacessemiconductor superlattices |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Apostolakis Apostolos Pereira Mauro F. |
spellingShingle |
Apostolakis Apostolos Pereira Mauro F. Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers Nanophotonics asymmetric current flow high harmonic generation interfaces semiconductor superlattices |
author_facet |
Apostolakis Apostolos Pereira Mauro F. |
author_sort |
Apostolakis Apostolos |
title |
Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers |
title_short |
Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers |
title_full |
Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers |
title_fullStr |
Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers |
title_full_unstemmed |
Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers |
title_sort |
superlattice nonlinearities for gigahertz-terahertz generation in harmonic multipliers |
publisher |
De Gruyter |
series |
Nanophotonics |
issn |
2192-8606 2192-8614 |
publishDate |
2020-07-01 |
description |
Semiconductor superlattices are strongly nonlinear media offering several technological challenges associated with the generation of high-frequency Gigahertz radiation and very effective frequency multiplication up to several Terahertzs. However, charge accumulation, traps and interface defects lead to pronounced asymmetries in the nonlinear current flow, from which high harmonic generation stems. This problem requires a full non-perturbative solution of asymmetric current flow under irradiation, which we deliver in this paper within the Boltzmann-Bloch approach. We investigate the nonlinear output on both frequency and time domains and demonstrate a significant enhancement of even harmonics by tuning the interface quality. Moreover, we find that increasing arbitrarily the input power is not a solution for high nonlinear output, in contrast with materials described by conventional susceptibilities. There is a complex combination of asymmetry and power values leading to maximum high harmonic generation. |
topic |
asymmetric current flow high harmonic generation interfaces semiconductor superlattices |
url |
https://doi.org/10.1515/nanoph-2020-0155 |
work_keys_str_mv |
AT apostolakisapostolos superlatticenonlinearitiesforgigahertzterahertzgenerationinharmonicmultipliers AT pereiramaurof superlatticenonlinearitiesforgigahertzterahertzgenerationinharmonicmultipliers |
_version_ |
1717776469069922304 |