@article{oai:ynu.repo.nii.ac.jp:00008650,
 author = {Yoshioka, Katsumasa and Katayama, Ikufumi and Minami, Yasuo and Kitajima, Masahiro and Yoshida, Shoji and Shigekawa, Hidemi and Takeda, Jun},
 journal = {Nature photonics},
 month = {},
 note = {The ultrafast coherent manipulation of electrons using waveform-controlled laser pulses1-9 is a key issue in the development of modern electronics10,11. Developing such an approach for a tunnel junction will provide a new platform for governing ultrafast currents on an ever smaller scale, which will be indispensable for the advancement of next-generation quantum nanocircuits12-15 and plasmonic devices16-18. Here, we demonstrate that carrier-envelope phase controlled single-cycle terahertz electric fields can coherently drive electron tunnelling either from a nanotip to a sample or vice versa. Spatially confined electric fields of more than 10 V/nm strongly modulate the potential barrier at a nanogap in a scanning tunnelling microscope (STM) within a sub-picosecond time scale and can steer a huge number of electrons in an extremely nonlinear regime, which is not possible using a conventional STM. Our results are expected to pave the way for the future development of nanoscale science and technologies.},
 pages = {762--765},
 title = {Real-space coherent manipulation of electrons in a single tunnel junction by single-cycle terahertz electric fields},
 volume = {10},
 year = {2016}
}