Controlled Drift of Indirect Excitons in Coupled Quantum Wells: Toward Bose Condensation in a Two-Dimensional Trap
Abstract
We have succeeded in trapping indirect excitons in coupled quantum wells in a harmonic potential minimum via inhomogeneous applied stress and electric field. These excitons exhibit a strong Stark shift (over 60 meV), long lifetime (100 ns), and high diffusivity (1000 cm2/s). This approach is very promising for obtaining the high exciton density needed for Bose condensation of excitons in two dimensions.
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