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Analytic Franz–Keldysh effect in one-dimensional polar semiconductors

Thomas G Pedersen and Thomas B Lynge

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The optical properties of a one-dimensional polar semiconductor in a strong electric field are considered. This class of materials includes non-centrosymmetric III–V inorganic quantum wires but also polar conjugated polymers such as polymethineimine. The polar Franz–Keldysh effect is derived via an analytic expression for the complex dielectric constant including line broadening and linear field terms. Results for the high-field non-perturbative regime as well as the low-field expansion are presented.


PACS

78.67.Lt Quantum wires

77.22.Ch Permittivity (dielectric function)

73.21.Hb Quantum wires

78.20.Jq Electrooptical effects

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 22 (11 June 2003)

Received 16 January 2003, in final form 2 April 2003

Published 23 May 2003



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