Collective excitations in antidots

K. Kern, D. Heitmann, P. Grambow, Yong-Hang Zhang, K. Ploog

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

Antidot structures have been prepared by etching arrays of 100-nm holes into a two-dimensional electron gas of GaxIn1-xAs quantum wells. In the far-infrared response we observe the unique collective excitation spectrum of antidots. It consists of a high-frequency branch which starts, in a magnetic field B, with a negative B dispersion and then increases in frequency with B. A second low-frequency branch corresponds at high B to edge magnetoplasmons which circulate around the holes. For small B this branch approaches the cyclotron frequency, where the electrons perform classical cyclotron orbits around the holes.

Original languageEnglish (US)
Pages (from-to)1618-1621
Number of pages4
JournalPhysical Review Letters
Volume66
Issue number12
DOIs
StatePublished - 1991
Externally publishedYes

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excitation
cyclotron frequency
cyclotrons
electron gas
etching
quantum wells
low frequencies
orbits
magnetic fields
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kern, K., Heitmann, D., Grambow, P., Zhang, Y-H., & Ploog, K. (1991). Collective excitations in antidots. Physical Review Letters, 66(12), 1618-1621. https://doi.org/10.1103/PhysRevLett.66.1618

Collective excitations in antidots. / Kern, K.; Heitmann, D.; Grambow, P.; Zhang, Yong-Hang; Ploog, K.

In: Physical Review Letters, Vol. 66, No. 12, 1991, p. 1618-1621.

Research output: Contribution to journalArticle

Kern, K, Heitmann, D, Grambow, P, Zhang, Y-H & Ploog, K 1991, 'Collective excitations in antidots', Physical Review Letters, vol. 66, no. 12, pp. 1618-1621. https://doi.org/10.1103/PhysRevLett.66.1618
Kern, K. ; Heitmann, D. ; Grambow, P. ; Zhang, Yong-Hang ; Ploog, K. / Collective excitations in antidots. In: Physical Review Letters. 1991 ; Vol. 66, No. 12. pp. 1618-1621.
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