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Characterization of vertical‐cavity surface‐emitting laser structures by modulation spectroscopy: A status report
Author(s) -
Klar P. J.,
Karcher C.,
Metzger B.,
Hosea T. J. C.
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200590011
Subject(s) - semiconductor , photonics , laser , spectroscopy , spintronics , optoelectronics , wavelength , resonator , semiconductor laser theory , characterization (materials science) , materials science , physics , modulation (music) , optics , condensed matter physics , ferromagnetism , quantum mechanics , acoustics
The present issue of physica status solidi (a) contains contributions from the International Workshop on Modulation Spectroscopy of Semiconductor Structures (MS 3 ), held in Wrocław, Poland, 1–3 July 2004. Editor's Choice is the article by P. J. Klar et al. [1] in which the advantages of these techniques are used to characterize optoelectronic devices. For a vertical‐cavity surface‐emitting laser structure (shown schematically in the lower part) to operate, the emission wavelength λ qw of its active region and the cavity mode at λ cav of its resonator structure need to coincide. The photomodulated reflectance spectrum (upper left part, bottom) shows clear features at both wavelengths whereas a feature at λ qw cannot be distinguished in the corresponding reflectance spectrum (top) due to its complicated photonic nature. The first author, Peter J. Klar is currently a lecturer of Physics at the Philipps‐University of Marburg, Germany. His research interests include the physics of magnetic semiconductors and hybrids for spintronics, of III–N–V semiconductor structures for optoelectronics, and of novel nanostructures ranging from nanomagnetism to applications in catalysis.