Eisele, M. and Cocker, T. L. and Huber, M. A. and Plankl, M. and Viti, L. and Ercolani, D. and Sorba, L. and Vitiello, M. S. and Huber, R. (2014) Ultrafast multi-terahertz nano-spectroscopy with sub-cycle temporal resolution. NATURE PHOTONICS, 8 (11). pp. 841-845. ISSN 1749-4885, 1749-4893
Full text not available from this repository. (Request a copy)Abstract
Phase-locked ultrashort pulses in the rich terahertz spectral range(1-18) have provided key insights into phenomena as diverse as quantum confinement(7), first-order phase transitions(8,12), high-temperature superconductivity(11) and carrier transport in nanomaterials(1,6),(13-15). Ultrabroadband electrooptic sampling of few-cycle field transients(1) can even reveal novel dynamics that occur faster than a single oscillation cycle of light(4,8,10). However, conventional terahertz spectroscopy is intrinsically restricted to ensemble measurements by the diffraction limit. As a result, it measures dielectric functions averaged over the size, structure, orientation and density of nanoparticles, nanocrystals or nanodomains. Here, we extend ultrabroadband time-resolved terahertz spectroscopy to the sub-nanoparticle scale (10 nm) by combining subcycle, field-resolved detection (10 fs) with scattering-type near-field scanning optical microscopy (s-NSOM)(16-26). We trace the time-dependent dielectric function at the surface of a single photoexcited InAs nanowire in all three spatial dimensions and reveal the ultrafast (<50 fs) formation of a local carrier depletion layer.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NANOWIRES; MATTER; LIGHT; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Rupert Huber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Aug 2019 08:55 |
| Last Modified: | 08 Aug 2019 08:55 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9286 |
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