Dresden 2026 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 8: Ultra-fast Phenomena I

HL 8.7: Vortrag

Montag, 9. März 2026, 16:45–17:00, POT/0006

Carrier-envelope phase modulation of ultrafast photocurrents in indium nitride — •Maximilian A. Gruber, Alexandra V. Nemmaier, Johannes Schmuck, Abhilash Ulhe, Gregor Koblmüller, and Alexander W. Holleitner — Walter Schottky Institute and Physics Department, Technical University of Munich, Munich, Germany

Few-cycle laser pulses allow for electronic transport at petahertz frequencies, where the carrier-envelope phase (CEP) controls the direction and strength of the ultrafast photocurrents. While such effects have been studied in graphene, bulk semiconductors and wide-bandgap dielectrics, their realization in group-III nitrides remains largely unexplored. We demonstrate CEPdependent photocurrents in InN devices excited by stabilized 6 fs optical pulses. The response reveals fieldsensitive contributions and strong interface effects close to the contacts of the investigated sample, highlighting the microscopic role of builtin electric fields in device architecture. The results position InN as a promising platform for CEP-controlled ultrafast transport.

Keywords: ultra-fast; photocurrent; InN; light-steering