Photogeneration of hot plasmonic electrons with metal nanocrystals: quantum description and potential applications
buir.contributor.author | Demir, Hilmi Volkan | |
buir.contributor.orcid | Demir, Hilmi Volkan|0000-0003-1793-112X | |
dc.citation.epage | 101 | en_US |
dc.citation.issueNumber | 1 | en_US |
dc.citation.spage | 85 | en_US |
dc.citation.volumeNumber | 9 | en_US |
dc.contributor.author | Govorov, A. O. | en_US |
dc.contributor.author | Zhang, H. | en_US |
dc.contributor.author | Demir, Hilmi Volkan | en_US |
dc.contributor.author | Gun’ko, Y. K. | en_US |
dc.date.accessioned | 2015-07-28T12:03:17Z | |
dc.date.available | 2015-07-28T12:03:17Z | |
dc.date.issued | 2014-02 | en_US |
dc.department | Department of Physics | en_US |
dc.department | Department of Electrical and Electronics Engineering | en_US |
dc.department | Institute of Materials Science and Nanotechnology (UNAM) | en_US |
dc.description.abstract | he paper reviews physical concepts related to the collective dynamics of plasmon excitations in metal nanocrystals with a focus on the photogeneration of energetic carriers. Using quantum linear response theory, we analyze the wave function of a plasmon in nanostructures of different sizes. Energetic carriers are efficiently generated in small nanocrystals due to the non-conservation of momentum of electrons in a confined nanoscale system. On the other hand, large nanocrystals and nanostructures, when driven by light, produce a relatively small number of carriers with large excitation energies. Another important factor is the polarization of the exciting light. Most efficient generation and injection of high-energy carriers can be realized when the optically induced electric current is along the smallest dimension of a nanostructure and also normal to its walls and, for efficient injection, the current should be normal to the collecting barrier. Other important properties and limitations: (1) intra-band transitions are preferable for generation of energetic electrons and dominate the absorption for relatively long wavelengths (approximately >600 nm), (2) inter-band transitions efficiently generate energetic holes and (3) the carrier-generation and absorption spectra can be significantly different. The described physical properties of metal nanocrystals are essential for a variety of potential applications utilizing hot plasmonic electrons including optoelectronic signal processing, photodetection, photocatalysis and solar-energy harvesting. © 2014 Elsevier Ltd. | en_US |
dc.identifier.doi | 10.1016/j.nantod.2014.02.006 | en_US |
dc.identifier.issn | 1748-0132 | |
dc.identifier.uri | http://hdl.handle.net/11693/12825 | |
dc.language.iso | English | en_US |
dc.publisher | Elsevier Ltd | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1016/j.nantod.2014.02.006 | en_US |
dc.source.title | Nano Today: an international rapid reviews journal | en_US |
dc.subject | Plasmon | en_US |
dc.subject | Plasmonic electrons | en_US |
dc.subject | Injection of electrons | en_US |
dc.subject | Nanostructures | en_US |
dc.subject | Photoelectric effect | en_US |
dc.subject | Photodetectors | en_US |
dc.subject | Photocatalysis | en_US |
dc.title | Photogeneration of hot plasmonic electrons with metal nanocrystals: quantum description and potential applications | en_US |
dc.type | Article | en_US |
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