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Conferences > EQEC > 1994 > QWB > QWB1
  • European Quantum Electronics Conference
  • Technical Digest Series (Optica Publishing Group, 1994),
  • paper QWB1

Coherent submillimeter wave emission from Bloch oscillations in higher Wannier-Stark ladders of a semiconductor superlattice

Christian Waschke, Ralf Schwedler, Youssef Dhaibi, Hartmut G. Roskos, Heinrich Kurz, and Klaus Köhler

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Abstract

Recently, Bloch oscillations of optically excited wavepackets in semiconductor superlattices have been observed with time-resolved terahertz (THz) emission spectroscopy.1,2 In this paper, we present evidence for Bloch oscillations in the Wannier-Stark ladder (WSL) of the second electron miniband. This is the first observation of coherent charge oscillations in high excited states, where ultrafast dephasing has been assumed to suppress such oscillations.

© 1994 IEEE

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