Title :
Hot electron photoemission from plasmonic nanoparticles: Role of transient absorption in surface mechanism
Author :
Uskov, A.V. ; Protsenko, I.E. ; Ikhsanov, R.Sh. ; Babicheva, Viktoriia E. ; Zhukovsky, Sergei V. ; Lavrinenko, Andrei V. ; O´Reilly, E.P. ; Hongxing Xu
Author_Institution :
P.N. Lebedev Phys. Inst., Moscow, Russia
Abstract :
We analyze and compare surface- and volume-based internal photoelectric effects from spherical nanoparticles, obtaining analytical expressions for the photoemission rate in both cases. Similar to results for a flat metal surface, one can show that the surface mechanism prevails, since it is unaffected by detrimental hot electron collisions. Transient absorption results from dielectric permittivity discontinuity at the nanoparticle boundary and leads to a substantial (by ~5 times) increase of the photoelectron emission rate.
Keywords :
hot carriers; nanoparticles; permittivity; photoemission; plasmonics; analytical expressions; detrimental hot electron collisions; dielectric permittivity discontinuity; flat metal surface; hot electron photoemission; nanoparticle boundary; photoelectron emission rate; plasmonic nanoparticles; spherical nanoparticles; surface mechanism; surface-based internal photoelectric effect; transient absorption; volume-based internal photoelectric effect; Absorption; Cooling; Metals; Nanoparticles; Photoelectricity; Photonics; Plasmons;
Conference_Titel :
Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2014 8th International Congress on
Conference_Location :
Lyngby
Print_ISBN :
978-1-4799-3450-8
DOI :
10.1109/MetaMaterials.2014.6948547
