Transient electromagnetically induced transparency in self-assembled quantum dots

被引:94
|
作者
Marcinkevicius, S. [1 ]
Gushterov, A. [2 ]
Reithmaier, J. P. [2 ]
机构
[1] Royal Inst Technol, Dept Microelect & Appl Phys, S-16440 Kista, Sweden
[2] Univ Kassel, Inst Nanostruct Technol & Analyt, D-34132 Kassel, Germany
关键词
D O I
10.1063/1.2840160
中图分类号
O59 [应用物理学];
学科分类号
摘要
A coherent absorption dip in pump-probe experiment performed on a ten layer optically thin InGaAs/GaAs quantum dot (QD) structure has been observed. Measurements performed for different wavelengths, polarizations, pulse widths, and temperatures allow assigning the dip to electromagnetically induced transparency (EIT). The EIT scheme is based on coupling of excitons with different spins in asymmetric QDs. Using spectrally narrow pulses, detrimental effect of the inhomogeneous broadening is reduced since only the QDs with transitions resonant with the pulse wavelength are addressed and participate in the EIT. The effect has been observed at temperatures up to 140 K.
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页数:3
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