Bose-Einstein condensation of excitons and polaritons

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polarization of bright luminescence low stress high stress, with dark spot
General considerations for coupled quantum wells spin structure: lowest exciton has two J=1 (“bright”) and two J=1 (“dark”) states. fourfold degeneracy broken by stress. exchange effects greatly suppressed by low overlap of electron-hole wave functions. brightness/lifetime affected by lh-hh mixing with stress Combescot: for degenerate spin states, BEC should always occur in dark state. limited available density range: localization in disorder at low density, low T. interactions: flattening of trap at high density. Effective Exciton temperature (K) Bath temperature (K)
Page 1 and 2: Exciton and Polariton Condensates O
Page 3 and 4: Prehistory of exciton BEC early, in
Page 5 and 6: Cu 2 O excitons Snoke et al, 1987
Page 7 and 8: Tradeoff: binding energy decreases
Page 9 and 10: Measurements of exciton drift/diffu
Page 11 and 12: strong dipole-dipole repulsion of i
Page 13 and 14: Timofeev et al. (many JETP) micro-P
Page 15 and 16: strain (arb. units) Trapping excito
Page 17 and 18: E% Equilibrium in trap: blue shift
Page 19: Temperature series-- spatial images
Page 23 and 24: Cavity Polaritons ! cavity photon:
Page 25 and 26: Typical wafer properties • Wedge
Page 27 and 28: Do the polaritons really move? Drif
Page 29 and 30: Four types of pumping: E k electron
Page 31 and 32: Spatial profiles of polariton lumin
Page 33 and 34: Unstressed-- weakly coupled Angle-r
Page 35 and 36: Momentum distribution of polaritons
Page 37 and 38: Occupation number vs. Energy Tail i
Page 39 and 40: Three regimes: polaritons near equi
Page 41 and 42: phonon scattering totally inadequat
Page 43 and 44: Splitting of bright exciton states
Page 45 and 46: phase locking via interactions E -1
Page 47 and 48: Weak coupling turns off Rabi splitt
Page 49 and 50: Our results for resonant, non-trapp
Page 51 and 52: Resonant, non-trapped Intensity vs.
Page 53 and 54: Angle-resolved spectra Stress trap,
Page 55 and 56: Angle-resolved spectrum Unstressed,
Page 57 and 58: Botao Zhang Nick Sinclair Annie Wan

Bose-Einstein condensation of excitons and polaritons

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