Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices
Recent studies have predicted a strong increase in high harmonic emission in unbiased semiconductor superlattices due to asymmetric current flow. In parallel, an external static bias has led to orders of magnitude control of high harmonics. Here, we study how this control can affect the operation of...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/5/1287 |
| _version_ | 1797534225854889984 |
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| author | Mauro Fernandes Pereira Apostolos Apostolakis |
| author_facet | Mauro Fernandes Pereira Apostolos Apostolakis |
| author_sort | Mauro Fernandes Pereira |
| collection | DOAJ |
| description | Recent studies have predicted a strong increase in high harmonic emission in unbiased semiconductor superlattices due to asymmetric current flow. In parallel, an external static bias has led to orders of magnitude control of high harmonics. Here, we study how this control can affect the operation of superlattice multipliers in a range of input frequencies and powers delivered by commercially available GHz sources. We show that the strongly nonlinear behavior can lead to a very complex scenario. Furthermore, it is natural to ask what happens when we combine both asymmetry and voltage control effects. This question is answered by the simulations presented in this study. The efficiency of high-order even harmonics is increased by the combined effects. Furthermore, the development of ‘petals’ in high-order emission is shown to be more easily achieved, opening the possibility to very interesting fundamental physics studies and more efficient devices for the GHz–THz range. |
| first_indexed | 2024-03-10T11:26:40Z |
| format | Article |
| id | doaj.art-37fe014d2deb490980d3c632b90da5c7 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T11:26:40Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-37fe014d2deb490980d3c632b90da5c72023-11-21T19:35:45ZengMDPI AGNanomaterials2079-49912021-05-01115128710.3390/nano11051287Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor SuperlatticesMauro Fernandes Pereira0Apostolos Apostolakis1Department of Physics, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab EmiratesInstitute of Physics, Czech Academy of Sciences, 18221 Prague, Czech RepublicRecent studies have predicted a strong increase in high harmonic emission in unbiased semiconductor superlattices due to asymmetric current flow. In parallel, an external static bias has led to orders of magnitude control of high harmonics. Here, we study how this control can affect the operation of superlattice multipliers in a range of input frequencies and powers delivered by commercially available GHz sources. We show that the strongly nonlinear behavior can lead to a very complex scenario. Furthermore, it is natural to ask what happens when we combine both asymmetry and voltage control effects. This question is answered by the simulations presented in this study. The efficiency of high-order even harmonics is increased by the combined effects. Furthermore, the development of ‘petals’ in high-order emission is shown to be more easily achieved, opening the possibility to very interesting fundamental physics studies and more efficient devices for the GHz–THz range.https://www.mdpi.com/2079-4991/11/5/1287gigahertzterahertzsemiconductor superlatticesharmonic generation |
| spellingShingle | Mauro Fernandes Pereira Apostolos Apostolakis Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices Nanomaterials gigahertz terahertz semiconductor superlattices harmonic generation |
| title | Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices |
| title_full | Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices |
| title_fullStr | Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices |
| title_full_unstemmed | Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices |
| title_short | Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices |
| title_sort | combined structural and voltage control of giant nonlinearities in semiconductor superlattices |
| topic | gigahertz terahertz semiconductor superlattices harmonic generation |
| url | https://www.mdpi.com/2079-4991/11/5/1287 |
| work_keys_str_mv | AT maurofernandespereira combinedstructuralandvoltagecontrolofgiantnonlinearitiesinsemiconductorsuperlattices AT apostolosapostolakis combinedstructuralandvoltagecontrolofgiantnonlinearitiesinsemiconductorsuperlattices |