Cascaded Amplification and Manipulation of Terahertz Emission by Flexible Spintronic Heterostructures

Zuanming, J.; Peng, Y.; Ni, Y.; Wu, G.; Ji, B.; Wu, X.; Zhang, Z.; Ma, G.; Zhang, C.; Chen, L.; Balakin, A.V.; Shkurinov, A.P.; Zhu, Y.; Zhuang, S.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 13 июля 2022 г.

Авторы: Zuanming Jin, Peng Yan, Ni Yangyang, Wu Guanjie, Ji Bingyu, Wu Xu, Zhang Zongzhi, Ma Guohong, Zhang Chao, Chen Lin, Balakin Alexey V., Shkurinov Alexander P., Zhu Yiming, Zhuang Songlin
Журнал: Laser and Photonics Reviews
Год издания: 2022
Издательство: Wiley - VCH Verlag GmbH & CO. KGaA
Местоположение издательства: Germany
Первая страница: 2100688
DOI: 10.1002/lpor.202100688
Аннотация: Spintronic heterostructures consisting of ferromagnetic (FM) andnonmagnetic (NM) have become increasingly important devices for terahertz(THz) pulse generation, named as spintronic THz emitter (STE). The recyclingof the laser pump energy is known to have a key impact on furtherimprovement of the THz emission. Here, an efficient and practical approachto enhance and manipulate THz generation based on a cascaded Pt/CoFe/Tatrilayer fabricated on a flexible polyethylene terephthalate (PET) substrate isshown. Considering the refractive index n of PET is ≈1.61 at 1.55 eV and≈1.75 at THz frequencies, it is anticipated that the femtosecond (fs) laserpulse propagates with a similar group velocity as the generated THz pulse.Therefore, the cascaded design enables all THz emission from each PET/STEpropagating almost in-phase and yields a 1.55 times amplification comparedto a single PET/STE. Two proof-of-concept demonstrations are experimentallypresented. First one, a metasurface can be assembled with the cascadedPET/STE to manipulate the THz signal. Second one, the cascaded PET/STE isused to perform a spectroscopic measurement of riboflavin. Thesedemonstrations highlight the potential of flexible PET/STE for building blocksof advanced functionalities, such as compact THz emitters, THzspectroscopic, and imaging systems.
Добавил в систему: Шкуринов Александр Павлович

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