Terahertz radiation from InAlAs and GaAs surface intrinsic-N + structures and the critical electric fields of semiconductors

J. S. Hwang, H. C. Lin, K. I. Lin, X. C. Zhang

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Abstract

This study examines terahertz radiation from a series of In0.52 Al0.48 As and GaAs surface-intrinsic- N+ structures (SI N+) with surface-intrinsic layers of various thicknesses. The built-in electric fields in the SI N+ structures are used as the bias. Experimental results indicate that the amplitudes of the THz emission are independent of the built-in electric fields in the emitters when the built-in electric fields exceed the corresponding critical electric fields of the semiconductors. In contrast, the amplitudes of the THz emission are proportional to the thickness of the intrinsic layer and, therefore, the number of photo-excited charged carriers.

Original languageEnglish
Article number121107
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number12
DOIs
Publication statusPublished - 2005 Sep 19

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electric fields
radiation
surface layers
emitters

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "This study examines terahertz radiation from a series of In0.52 Al0.48 As and GaAs surface-intrinsic- N+ structures (SI N+) with surface-intrinsic layers of various thicknesses. The built-in electric fields in the SI N+ structures are used as the bias. Experimental results indicate that the amplitudes of the THz emission are independent of the built-in electric fields in the emitters when the built-in electric fields exceed the corresponding critical electric fields of the semiconductors. In contrast, the amplitudes of the THz emission are proportional to the thickness of the intrinsic layer and, therefore, the number of photo-excited charged carriers.",
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Terahertz radiation from InAlAs and GaAs surface intrinsic-N + structures and the critical electric fields of semiconductors. / Hwang, J. S.; Lin, H. C.; Lin, K. I.; Zhang, X. C.

In: Applied Physics Letters, Vol. 87, No. 12, 121107, 19.09.2005, p. 1-3.

Research output: Contribution to journalArticle

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