Structure of quantum dots as seen by excitonic spectroscopy versus structural characterization: Using theory to close the loop

V. Mlinar, M. Bozkurt, J. M. Ulloa, M. Ediger, G. Bester, A. Badolato, P. M. Koenraad, R. J. Warburton, A. Zunger
2009 Physical Review B  
Structure of quantum dots as seen by excitonic spectroscopy versus structural characterization: Using theory to close the loop Mlinar, V.; Bozkurt, M.; Ulloa, J.M.; Ediger, M.; Bester, G.; Badolato, A.; Koenraad, P.M.; Warburton, R.J.; Zunger, A. . (2009). Structure of quantum dots as seen by excitonic spectroscopy versus structural characterization: Using theory to close the loop. Structure-spectra relationship in semiconductor quantum dots ͑QDs͒ is investigated by subjecting the same QD
more » ... g the same QD sample to single-dot spectroscopy and cross-sectional scanning tunneling microscopy ͑XSTM͒ structural measurements. We find that the conventional approach of using XSTM structure as input to calculate the spectra produces some notable conflicts with the measured spectra. We demonstrate a theoretical "inverse approach" which deciphers structural information from the measured spectra and finds structural models that agree with both XSTM and spectroscopy data. This effectively "closes the loop" between structure and spectroscopy in QDs.
doi:10.1103/physrevb.80.165425 fatcat:7vrxkzllhnd6phe2xxhjzy6f44