Optical detection of electron paramagnetic resonance in CdMnTe single quantum wells

Sadowski, M. L.; Byszewski, M.; Potemski, M.; Sachrajda, A.; Karczewski, G.
May 2003
Applied Physics Letters;5/26/2003, Vol. 82 Issue 21, p3719
Academic Journal
The electron paramagnetic resonance of Mn[sup 2+] ions localized in a CdTe quantum well is measured by an all-optical method. The photoluminescence transitions of a two-dimensional electron gas are used to monitor changes in the Mn spin polarization. The local character of this probe and the detection technique permit us to achieve a very high sensitivity for the number of spins detected (better than 10[sup 8] spins). Two simultaneous effects are observed at resonance: A blueshift of the whole photoluminescence spectrum, and a dramatic transfer of photoluminescence intensity from neutral to negatively charged excitons.


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