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HL: Fachverband Halbleiterphysik

HL 13: Poster I

HL 13.47: Poster

Montag, 18. März 2024, 15:00–18:00, Poster E

Ultrafast THz Engineering of Semiconductor Photoluminescence — •Maximilian Frenzel, Joanna M. Urban, Michael S. Spencer, Martin Wolf, and Sebastian F. Maehrlein — Fritz Haber Institute of the Max Planck Society, Berlin, Germany

Exploring the interaction between THz radiation and semiconductor photoluminescence (PL) presents a potential avenue for developing future optoelectronic devices and gaining novel insights into ultrafast semiconductor physics. In this work, we employ single-cycle THz pulses (0.5-4 THz) with peak fields exceeding 1 MV/cm to control the PL of a bulk ZnTe semiconductor. We find that THz pulses can quench the total emitted PL by more than 50% at room temperature. In addition to reducing the emission magnitude, the THz pulses also affect the PL's spectral weight, thus allowing the PL to be tailored by the THz fluence. Moreover, we study THz-induced quenching as a function of time delay with respect to the photo carrier injection, which provides a further control knob to tune the emission, whilst also constituting an ultrafast probe for studying the interplay of lattice and carrier dynamics. Our work serves as a systematic study to control the emission and carrier dynamics using THz light and establishes a testbed for future investigations of electron-phonon interactions in emerging semiconductors.

Keywords: Terahertz; Semiconductors; Photoluminescence