Coupling terahertz pulses to a scanning tunnelling microscope (THz-STM).
Autocorrelation of terahertz pulses at an STM tunnel junction.
THz-STM imaging as a function of terahertz pulse autocorrelation overlap time.
Ultrafast photoexcitation of an InAs nanodot (optical-pump/THz-STM-probe).
Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
- Tyler L. Cocker,
- Vedran Jelic,
- Jacob A. J. Burgess,
- Glenda De Los Reyes,
- Lyubov V. Titova,
- Mark R. Freeman &
- Frank A. Hegmann
Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
- Manisha Gupta,
- Sean J. Molesky &
- Ying Y. Tsui
T.L.C. designed and built the THz-STM set-up, and T.L.C. and F.A.H. wrote the manuscript with contributions from all authors. T.L.C. and V.J. developed the THz-STM and carried out experiments with support from J.A.J.B., G.D.L.R., L.V.T. and F.A.H. S.J.M. contributed to the initial design phase of the THz-STM. M.G. and Y.Y.T. provided the InAs nanodot sample and assisted in sample characterization. T.L.C. analysed the data, and V.J., T.L.C. and M.R.F. developed the Simmons model simulation and fits to the data. F.A.H. initiated and developed the THz-STM concept with contributions from M.R.F., helped design the THz-STM set-up, and supervised the project. All authors contributed to discussions.
Competing financial interests
The authors declare no competing financial interests.