Naslov
Spontaneous emission from a quasi-two-dimensional Wigner crystal in a multilayer configuration

Autori
Lenac, Zdravko

Izvornik
Physical Review A 63 (2001);

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
spontaneous emission; Wigner crystal; dielectric multilayer

Sažetak
Spontaneous emission (SE) from electrons forming a quasi-two-dimensional Wigner crystal in a dielectric cavity is discussed for a multilayer configuration. All layers in the system are considered as dielectrics with real dielectric constants. Within such a model, we treat SE completely from the quantum--mechanical (QM) point of view, i.e., we use the quantized electromagnetic field in dielectrics and calculate its interaction with electrons in the Wigner crystal. The full QM approach enables us to go beyond the standard dipole approximation and take into account, e.g., the vibration of electrons around their regular positions inside the crystal and the change of electron positions during the deexcitation process. We analyze only the perpendicular transitions, which involve quantum states determined mainly by the image potential. Since this potential is relatively weak for a typical configuration of a Wigner lattice, the corresponding electromagnetic lifetime \tau is estimated to be very large ( \tau < 10^{-3} s ). For a Wigner crystal in a dielectric cavity between two metallic plates, we have also found a significant influence of the cavity selection rules on the SE decay rate.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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