玻色-爱因斯坦凝聚成为探索量子世界的一种新方法,而且在半导体纳米结构中激子的凝聚研究取得了很大进展.实验上利用耦合量子阱间接激子中电子和空穴在空间上的分离,显著提高了激子的冷却速度和寿命,成功地把激子冷却到1 K以下,观察到了激子的准凝聚状态.着重介绍冷激子系统凝聚现象、发光图案和宏观有序的激子态.理解这些简并激子系统的形成机理,为其在半导体纳米结构中最终实现玻色-爱斯坦凝聚提供新的机会.
参考文献
| [1] | Davis K B,et al.Bose-Einstein condensation in a gas of sodium atoms[J].Phy.Rev.Lett.,1995,75:3969-3973. |
| [2] | Snoke D.For a general review of recent theory and experiments on Bose condensation of excitons[J].Science,2002,298:1368-1375. |
| [3] | Anderson M N,Ensher J R,et al.Obseration of Bose-Einstein condensation in a dilute atomic vapor[J].Science,1995,269:198-202. |
| [4] | Butov L V,Lai C W,Ivanov A L,et al.Towards Bose-Einstein condensation of excitons in potential traps[J].Nature,2002,417:47-51. |
| [5] | Butov L V,Gossard A C,Chemla D S.Macroscopically ordered state in an exciton system[J].Nature,2002,418:751-754. |
| [6] | Butov L V,Ivanov A L,Imamoglu A.Stimulated scattering of indirect excitons in coupled quantum wells:signature of a degenerate Bose-gas of excitons[J].Phy.Rev.Lett.,2001,86:5608-5611. |
| [7] | Zhu X,Littlewood P B,Hybertsen M.Exciton condensate in semiconductor quantum well structures[J].Phy.Rev.Lett.,1995,74:1633-1636. |
| [8] | Butov L V,Filin A I.Anomalous transport and luminescence of indirect excitons in AlAs/GaAs coupled quantum wells as evidence for exciton condensation[J].Phys.Rev.B,1998,58:1980-2000. |
| [9] | Butov L V.Exciton condensation in coupled quantum wells[J].Solid State Communications,2003,127:89-98. |
| [10] | Butov L V.Condensation and pattern formation in cold exciton gases in coupled quantum wells[J].J.Phys.Condens.Matter,2004,16:1577-1613. |
| [11] | Perakis I E.Exciton developments[J].Nature,2002,417:33-34. |
| [12] | Bányai L A,et al.Quasiclassical approach to Bose condensation in a finite potential well[J].Phy.Rev.B,2004,70:045201. |
| [13] | Lai C W,Zoch J,Gossard A C,et al.Phase diagram of degenerate exciton systems[J].Science,2004,303:503-506. |
| [14] | Keeling J,Levitov L S.Angular distribution of photoluminescence as a probe of Bose condensation of trapped excitons[J].Phy.Rev.Lett.,2004,92:176402. |
| [15] | Butov L V,et al.Formation mechanism and low-temperature instability ofexciton rings[J].Phy.Rev.Lett.,2004,92:117404. |
| [16] | Rapaport R,Chen G,Snoke D.Charge separation of dense two-dimensional electron-hole gases:Mechanism for exciton ring pattern formation[J].Phy.Rev.Lett.,2004,92:117405. |
| [17] | Ivanov A L,Smallwood L E,Hammack A T,et al.Origin of the inner ring in photoluminescence patterns of quantum well excitons[OL].condmat/0509097. |
| [18] | V(o)r(o)s Z,Balili R,et al.Long-distance diffusion of excitons in double quantum well structures[J].Phy.Rev.Lett.,2005,94:226401. |
| [19] | G(a)rtner A,Schuh D,Kotthaus J P.Dynamics long-living excitons in tunable potential landscapes[OL].2005,condmat/0509142 (from internet). |
| [20] | Levitov L S,Simons B D,Butov L V.Pattern formation in exciton system near quantum degeneracy[OL].condmat/0503628 (from internet). |
| [21] | Su Xiaoqin,Guo Guangcan.Quantum communication and quantum computation[J].Chinese Journal of Quantum Electronics (量子电子学报),2004,21(6):706 (in Chinese). |
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