Abstract
The tunneling resonance technique is used to study the electronic surface state (Tamm state) [Phys. Rev. Lett. 64, 2555 (1990)] under external electric field in semiconductor superlattices. The localization characteristics of the confined surface states depend on the direction and strength of the applied electric field. In the weak-field regime the surface states behave delocalized due to the distortion of the periodic medium by the applied field. The calculations presented can provide eigenenergy, wave function, and lifetime for the quasibound surface states, which are related directly to the optical properties of surface states under an electric field.
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