Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Generalized framework for the step response of semiconducting materials to optically switched electrical bias input in terahertz emission spectroscopy

Not Accessible

Your library or personal account may give you access

Abstract

In this paper, a generalized framework for the step response of semiconducting materials to optically switched electrical bias input in terahertz emission spectroscopy was developed, introducing a complex response function into the frequency domain. A comprehensive formula was obtained for calculating the transient current from the poles of the response function under bias field. This formula was found to give transient currents of an exponentially saturated, overshooting, or oscillating nature for three different regimes of charge transport in an isolated energy band. Furthermore, it was clarified how the transient terahertz emission is linked to the response function and its retarded contribution. When either true current or polarization current is linear with respect to bias field and dominates the transient current, the retarded contribution is identified as the small-signal ac complex conductivity. Two different spectral examples of the retarded contribution were given for actual terahertz Bloch oscillations in biased semiconductor superlattices, describing the small-signal response of polarization current under the Wannier–Stark localization and the large-signal response of true current under interminiband mixing.

© 2023 Optica Publishing Group

Full Article  |  PDF Article
More Like This
Response times of a degenerately doped semiconductor based plasmonic modulator

Raj K. Vinnakota, Zuoming Dong, Andrew F. Briggs, Seth R. Bank, Daniel Wasserman, and Dentcho A. Genov
J. Opt. Soc. Am. B 40(5) 978-985 (2023)

Interaction of terahertz transients and broadband optical pulses in quantum wells

Steven Hughes and David S. Citrin
J. Opt. Soc. Am. B 17(1) 128-137 (2000)

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the author upon reasonable request.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (27)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved