Controlled Drift of Indirect Excitons in Coupled Quantum Wells: Toward Bose Condensation in a Two-Dimensional Trap

Negoita, V.; Snoke, D. W.; Eberl, K.

Controlled Drift of Indirect Excitons in Coupled Quantum Wells: Toward Bose Condensation in a Two-Dimensional Trap

Authors

Negoita, V.

Snoke, D. W.

Eberl, K.

Description

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 cm$^2$/s). This approach is very promising for obtaining the high exciton density needed for Bose condensation of excitons in two dimensions.
4 pages, 6 jpeg figures