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Heterostructures composed of ferromagnetic metal and nonmagnetic metal with strong spin-orbit coupling are shown to be powerful broadband THz emitters, whose field strength can be maximized by optimizing the thickness of both ferromagnetic and nonmagnetic films, and the heterostructure layers. Furthermore, the THz spectrum and its intensity are tunable by the magnetic field orientation applied on the patterned magnetic Fe/Pt heterostructures. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Yang et al. (Wed,) studied this question.