Efficient Generation and Arbitrary Manipulation of Chiral Terahertz Waves Emitted from Bi2Te3–Fe Heterostructures
Polarization arbitrary manipulated terahertz (THz) pulses with a prescribed amplitude temporal evolution and deposited electric‐field vectors can promote many disruptive technologies and enable enormous applications in polarization‐sensitive THz spectroscopy and imaging, ultrafast THz optospintronic...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2021-04-01
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| Series: | Advanced Photonics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/adpr.202000099 |
| _version_ | 1818355558387810304 |
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| author | Xinhou Chen Hangtian Wang Chun Wang Chen Ouyang Gaoshuai Wei Tianxiao Nie Weisheng Zhao Jungang Miao Yutong Li Li Wang Xiaojun Wu |
| author_facet | Xinhou Chen Hangtian Wang Chun Wang Chen Ouyang Gaoshuai Wei Tianxiao Nie Weisheng Zhao Jungang Miao Yutong Li Li Wang Xiaojun Wu |
| author_sort | Xinhou Chen |
| collection | DOAJ |
| description | Polarization arbitrary manipulated terahertz (THz) pulses with a prescribed amplitude temporal evolution and deposited electric‐field vectors can promote many disruptive technologies and enable enormous applications in polarization‐sensitive THz spectroscopy and imaging, ultrafast THz optospintronics, information encryption, and space exploration. However, the severe shortage of dynamically tunable THz polarization devices has impeded the proliferation of THz science and technology. Herein, a method of efficient generation and arbitrary manipulation of chiral THz waves in the topological insulator (TI)–iron (Fe) heterostructures through delicately engineering the linear photogalvanic effect (LPGE) and spin‐to‐charge conversion (SCC) effect induced by femtosecond laser pulses is proposed and demonstrated. Utilizing the intrinsic merits of optical‐controlled LPGE and magnetic field direction‐adjusted SCC effect, the TI–Fe can radiate chiral THz waves with arbitrarily tailored chirality and ellipticity. To verify the capability of such a novel chiral THz source, helical substructure associates THz circular dichroism spectroscopy is implemented on several (bio)materials, exemplified by the beetle exoskeletons. Furthermore, ultrafast switching between two THz chirality states can be realized by a double‐pulse excitation scheme. Such versatile chiral THz emitters with high efficiency and easy integration may have some disruptive applications. |
| first_indexed | 2024-12-13T19:43:14Z |
| format | Article |
| id | doaj.art-b5e61252c1dc47f8855f73efb8ac4cc2 |
| institution | Directory Open Access Journal |
| issn | 2699-9293 |
| language | English |
| last_indexed | 2024-12-13T19:43:14Z |
| publishDate | 2021-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Photonics Research |
| spelling | doaj.art-b5e61252c1dc47f8855f73efb8ac4cc22022-12-21T23:33:37ZengWiley-VCHAdvanced Photonics Research2699-92932021-04-0124n/an/a10.1002/adpr.202000099Efficient Generation and Arbitrary Manipulation of Chiral Terahertz Waves Emitted from Bi2Te3–Fe HeterostructuresXinhou Chen0Hangtian Wang1Chun Wang2Chen Ouyang3Gaoshuai Wei4Tianxiao Nie5Weisheng Zhao6Jungang Miao7Yutong Li8Li Wang9Xiaojun Wu10School of Electronic and Information Engineering Beihang University Beijing 100191 ChinaFert Beijing Institute, BDBC, and School of Microelectronics Beihang University Beijing 100191 ChinaBeijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 ChinaBeijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 ChinaBeijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 ChinaFert Beijing Institute, BDBC, and School of Microelectronics Beihang University Beijing 100191 ChinaFert Beijing Institute, BDBC, and School of Microelectronics Beihang University Beijing 100191 ChinaSchool of Electronic and Information Engineering Beihang University Beijing 100191 ChinaBeijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 ChinaBeijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 ChinaSchool of Electronic and Information Engineering Beihang University Beijing 100191 ChinaPolarization arbitrary manipulated terahertz (THz) pulses with a prescribed amplitude temporal evolution and deposited electric‐field vectors can promote many disruptive technologies and enable enormous applications in polarization‐sensitive THz spectroscopy and imaging, ultrafast THz optospintronics, information encryption, and space exploration. However, the severe shortage of dynamically tunable THz polarization devices has impeded the proliferation of THz science and technology. Herein, a method of efficient generation and arbitrary manipulation of chiral THz waves in the topological insulator (TI)–iron (Fe) heterostructures through delicately engineering the linear photogalvanic effect (LPGE) and spin‐to‐charge conversion (SCC) effect induced by femtosecond laser pulses is proposed and demonstrated. Utilizing the intrinsic merits of optical‐controlled LPGE and magnetic field direction‐adjusted SCC effect, the TI–Fe can radiate chiral THz waves with arbitrarily tailored chirality and ellipticity. To verify the capability of such a novel chiral THz source, helical substructure associates THz circular dichroism spectroscopy is implemented on several (bio)materials, exemplified by the beetle exoskeletons. Furthermore, ultrafast switching between two THz chirality states can be realized by a double‐pulse excitation scheme. Such versatile chiral THz emitters with high efficiency and easy integration may have some disruptive applications.https://doi.org/10.1002/adpr.202000099photogalvanic effectspolarization manipulationspin-to-charge conversionterahertz radiationtopological insulators |
| spellingShingle | Xinhou Chen Hangtian Wang Chun Wang Chen Ouyang Gaoshuai Wei Tianxiao Nie Weisheng Zhao Jungang Miao Yutong Li Li Wang Xiaojun Wu Efficient Generation and Arbitrary Manipulation of Chiral Terahertz Waves Emitted from Bi2Te3–Fe Heterostructures Advanced Photonics Research photogalvanic effects polarization manipulation spin-to-charge conversion terahertz radiation topological insulators |
| title | Efficient Generation and Arbitrary Manipulation of Chiral Terahertz Waves Emitted from Bi2Te3–Fe Heterostructures |
| title_full | Efficient Generation and Arbitrary Manipulation of Chiral Terahertz Waves Emitted from Bi2Te3–Fe Heterostructures |
| title_fullStr | Efficient Generation and Arbitrary Manipulation of Chiral Terahertz Waves Emitted from Bi2Te3–Fe Heterostructures |
| title_full_unstemmed | Efficient Generation and Arbitrary Manipulation of Chiral Terahertz Waves Emitted from Bi2Te3–Fe Heterostructures |
| title_short | Efficient Generation and Arbitrary Manipulation of Chiral Terahertz Waves Emitted from Bi2Te3–Fe Heterostructures |
| title_sort | efficient generation and arbitrary manipulation of chiral terahertz waves emitted from bi2te3 fe heterostructures |
| topic | photogalvanic effects polarization manipulation spin-to-charge conversion terahertz radiation topological insulators |
| url | https://doi.org/10.1002/adpr.202000099 |
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