Coulomb confinement resonances

Photoionization of doped fullerene anions Coulomb confinement resonances 38... 

In this case, the photoionization cross section possesses no Coulomb confinement resonances. This is because the fullerene cation s potential Vcti(r) seen by an outgoing photoelectron does not exhibit a Coulomb potential barrier (see Figure 10 for z = +5 for illustration purposes). 

The above discussion was focused on confinement resonances, whether regular or Coulomb, in the photoionization spectra of atoms encaged in a neutral or charged C60 carbon cage. 

For centuries, metal nanoparticles have never ceased to attract scientists and artists from many diverse cultures. In this section we briefly introduce a phenomenon of metal nanoparticles that still inspires scientists localized surface plasmon resonance (LSPR) (Hutter and Fendler, 2004). Metal nanoparticles show nonlinear electronic transport (single-electron transport of Coulomb blockade) and nonlinear/ultrafast optical response due to the SPR. Conduction electrons (—) and ionic cores (-F) in a metal form a plasma state. When external electric fields (i.e., electromagnetic waves, electron beams etc.) are applied to a metal, electrons move so as to screen perturbed charge distribution, move beyond the neutral states, return to the neutral states, and so on. This collective motion of electrons is called a plasma oscillation. SPR is a collective excitation mode of the plasma localized near the surface. Electrons confined in a nanoparticle conform the LSPR mode. The resonance frequency of the surface plasmon is different... 

Qualitative description of the n orbital energy spectrum lor the ethylene molecule. On the left-hand side the spectrum of the unconfined molecule is depicted and on the right-hand side, the spectrum of the confined molecule, a is the coulomb integral and is the resonance integral for the unconfIned system, and a and fi are the resonance integrals for the confined system. Reproduced with permission from [15]. 

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