Thermal expansion in photo-assisted tunneling: visible light versus free-space terahertz pulses
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910342920011776 |
|---|---|
| author | Azazoglu, Hüseyin Möller, Rolf Gruber, Manuel |
| author_facet | Azazoglu, Hüseyin Möller, Rolf Gruber, Manuel |
| contents | Photo-assisted tunneling in scanning tunneling microscopy has attracted considerable interest to combine sub-picosecond and sub-nanometer resolutions. The illumination of a junction with visible or infrared light, however, induces thermal expansion of the tip and the sample, which strongly affects the measurements. Employing free-space THz pulses instead of visible light has been proposed to solve these thermal issues while providing photo-induced currents of similar magnitude. Here we compared the impact of illuminating the same tunneling junction, reaching comparable photo-induced current, with red light and with THz radiations. Our data provide a clear and direct evidence of thermal expansion with red light-illumination, while such thermal effects are negligible with THz radiations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_15557 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Thermal expansion in photo-assisted tunneling: visible light versus free-space terahertz pulses Azazoglu, Hüseyin Möller, Rolf Gruber, Manuel Applied Physics Mesoscale and Nanoscale Physics Optics Photo-assisted tunneling in scanning tunneling microscopy has attracted considerable interest to combine sub-picosecond and sub-nanometer resolutions. The illumination of a junction with visible or infrared light, however, induces thermal expansion of the tip and the sample, which strongly affects the measurements. Employing free-space THz pulses instead of visible light has been proposed to solve these thermal issues while providing photo-induced currents of similar magnitude. Here we compared the impact of illuminating the same tunneling junction, reaching comparable photo-induced current, with red light and with THz radiations. Our data provide a clear and direct evidence of thermal expansion with red light-illumination, while such thermal effects are negligible with THz radiations. |
| title | Thermal expansion in photo-assisted tunneling: visible light versus free-space terahertz pulses |
| topic | Applied Physics Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2311.15557 |