Resistivity-controlled switching between photoemission and photothermoelectric effects in plasmonic nanojunctions
Nanoplasmonic optoelectronic devices exhibit ultrafast photoresponses through photothermoelectric and photoemission effects under femtosecond laser excitation, yet the interplay and transition between these mechanisms remain unexplored. Here, we modify the resistance between the two cathodes of nanojunctions by controlling the residual Ti adhesion layer. As the resistance increases, the primary mechanism of photocurrent generation shifts from photothermoelectric to photoemission.
Authors
- Qingbin Zhang (ORCID: https://orcid.org/0000-0002-2277-7414)
- Can Wang (ORCID: https://orcid.org/0000-0002-2890-0057)
- Peixiang Lu (ORCID: https://orcid.org/0000-0001-6993-8986)
- Jinxing Cao (ORCID: https://orcid.org/0000-0001-5224-7126)
- Jiawang Guo (ORCID: https://orcid.org/0009-0002-4775-8284)
Institutions
- Wuhan National Laboratory for Optoelectronics (CN)
- Huazhong University of Science and Technology (CN)
- Wuhan Institute of Technology (CN)
Publication Details
- Journal
- Optics Letters
- Published
- 2025-06-24
- DOI
- https://doi.org/10.1364/ol.564669
- Primary Topic
- Gold and Silver Nanoparticles Synthesis and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00