High-resolution near-field spectroscopy of InAs single quantum dots at 70 K

Yu, Young-Jun; Jhe, Wonho; Arakawa, Yasuhiko
October 2003
Applied Physics Letters;10/13/2003, Vol. 83 Issue 15, p3024
Academic Journal
We have performed high-resolution near-field laser spectroscopy and microscopy of single InAs/GaAs quantum dots near liquid nitrogen temperature. By simultaneous use of 100-nm shadow mask apertures and a 30-nm-aperture fiber probe, we have achieved photoluminescence (PL) resolution comparable to that available at liquid helium temperature. In particular, we have obtained a PL linewidth of 0.6 meV for single exciton states, and observed biexciton states with quadratic power dependence. © 2003 American Institute of Physics.


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