We present a theory of local optical spectroscopy in quantum wires taking into account structural disorder. The calculated spatially resolved spectra show the individual spectral lines due to the exciton states localized by the disordered potential in agreement with experimental findings. We investigate systematically the influence of the potential profile and of the spatial resolution on the local optical spectra. Several line scans along the wire axis are obtained for different spatial correlations and strength of the disorder potential and for different spatial resolutions ranging from the subwavelength to the diffraction limit. Lowering the spatial resolution causes the disappearance of many spectral lines due to destructive spatial interference. However, our results show that information on the individual eigenstates of this quasi one-dimensional quantum system can be obtained at also resolutions significantly lower than the correlation length of interface fluctuations.
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15 February 2002
Research Article|
February 15 2002
Theory of local optical spectroscopy of quantum wires with interface fluctuations
Omar Di Stefano;
Omar Di Stefano
INFM and Dipartimento di Fisica della Materia e Tecnologie Fisiche Avanzate, Università di Messina, Salita Sperone 31, I-98166 Messina, Italy
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Salvatore Savasta;
Salvatore Savasta
INFM and Dipartimento di Fisica della Materia e Tecnologie Fisiche Avanzate, Università di Messina, Salita Sperone 31, I-98166 Messina, Italy
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Raffaello Girlanda
Raffaello Girlanda
INFM and Dipartimento di Fisica della Materia e Tecnologie Fisiche Avanzate, Università di Messina, Salita Sperone 31, I-98166 Messina, Italy
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J. Appl. Phys. 91, 2302–2307 (2002)
Article history
Received:
May 30 2001
Accepted:
October 09 2001
Citation
Omar Di Stefano, Salvatore Savasta, Raffaello Girlanda; Theory of local optical spectroscopy of quantum wires with interface fluctuations. J. Appl. Phys. 15 February 2002; 91 (4): 2302–2307. https://doi.org/10.1063/1.1424049
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