Photoconductor for emitting and/or receiving electromagnetic waves

US10490686B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Roman Dietz · Berlin, DE
• Björn Globisch · Berlin, DE
• Thorsten Göbel · Berlin, DE
• W. Ted Masselink · Berlin, DE
• Mykhaylo Petrovych Semtsiv · Berlin, DE

Key dates

• Filing date: Feb 25, 2014
• Grant date: Nov 26, 2019
• Expiry date: Oct 22, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10F77/147

Abstract

A photoconductor for emitting and/or receiving electromagnetic waves is provided. The photoconductor comprises a material region comprising a first and a second section, wherein the second section provides a higher density of charge carrier trapping centers and/or recombination centers than the first section, and a confinement generating a sub-band structure of the charge carrier energy states in the material region. The first and the second section are arranged and configured in such a manner that a maximum of the carrier probability density of the sub-band ground state is located in one of these sections and a maximum of the carrier probability density of an excited sub-band state is located in the respective other section.