[Tu-P1-E] Terahertz spectroscopy and control of novel material systems

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)

[Tu-P1-E-02] THz Upconversion in HgTe Dirac Heterostructures

〇Tatiana Aureliia Uaman Svetikova¹, Igor Ilyakov¹, Alexey Ponomaryov¹, Thales de Oliveira¹, Christian Berger², Lena Fürst², Florian Bayer², Jan-Cristoph Deinert¹, Guloo Lal Prajapati¹, Atiqa Arshad¹, Elena Novik³, Alexej Pashkin¹, Manfred Helm^1,3, Hartmut Buhmann², Laurens Molenkamp², Tobias Kiessling², Sergey Kovalev^1,4, Georgy Astakhov¹ (1. Helmholtz-Zentrum Dresden-Rossendorf (Germany), 2. Universität Würzburg (Germany), 3. Technische Universität Dresden (Germany), 4. Technische Universität Dortmund (Germany))

We demonstrate broadband sub-THz to THz upconversion via four-wave mixing in HgTe heterostructures. Strong third-order nonlinearity and long carrier scattering times enable efficient frequency conversion, yielding field efficiencies above 2% at room temperature, supported by measurements of the underlying carrier dynamics.