Title :
Negative Differential Conductivities and Terahertz Gain in Bulk Semiconductors and Superlattices
Author :
Hirakawa, K. ; Unuma, T. ; Zhu, Y.M. ; Sekine, N.
Author_Institution :
Inst. of Ind. Sci. & NanoQuine, Univ. of Tokyo, Tokyo
Abstract :
Negative differential conductivity (NDC) is an essential feature for amplification and generation of electromagnetic waves. Particularly, NDC in the terahertz (THz) range has been attracting much attention for realizing compact solid-state THz sources for various kinds of applications. In this presentation, we will propose novel method of determining complex conductivity spectra, sigma(omega), by using time-domain THz spectroscopy.
Keywords :
electrical conductivity; semiconductor superlattices; terahertz spectroscopy; bulk semiconductors; complex conductivity spectra; electromagnetic wave amplification; electromagnetic wave generation; negative differential conductivities; superlattices; terahertz gain; time domain terahertz spectroscopy; Acceleration; Conductivity; Electric fields; Electromagnetic scattering; Electrons; Laser sintering; Oscillators; Semiconductor superlattices; Spectroscopy; Time domain analysis;
Conference_Titel :
Device Research Conference, 2008
Conference_Location :
Santa Barbara, CA
Print_ISBN :
978-1-4244-1942-5
Electronic_ISBN :
1548-3770
DOI :
10.1109/DRC.2008.4800830
