The vertical transport in short-period InAs/AlSb and GaAs/AlAs superlattices was studied. The negative differential conductivity was observed in a miniband transport regime as a result of the overlapping of confined states in a periodic quantum well structure (Esaki-Tsu mechanism). Several maxima appeared on current–voltage characteristics of the superlattices found in the non-resonant tunnelling regime. They are shown to be due to the influence of the optical cavity on optical transitions within quantum wells (Purcell effect).

Keywords: superlattices, non-resonant tunnelling, optical cavities, Purcell effect
PACS: 73.21.Cd, 73.40.Gk, 73.61.Ey, 78.67.Pt

NEREZONANSINIS TUNELIAVIMAS TRUMPO PERIODO SUPERGARDELĖSE SU OPTINIAIS REZONATORIAIS
M.S. Kagan^a, I.V. Altukhov^a, S.K. Paprotskiy^a , A.N. Baranov^b, R. Teissier^b, N.D. Il’inskaya ^c, A.A. Usikova^c, A.D. Buravlev^c, V.M. Ustinov ^c
aRusijos mokslų akademijos Kotelnikovo Radijo ir elektronikos inžinerijos institutas, Maskva, Rusija
^bMonpeljė II universitetas, Monpeljė, Prancūzija
^cRusijos mokslų akademijos Jofės fizikos technikos institutas, Sankt Peterburgas, Rusija

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