共 50 条
- [21] Switching Off a Microcavity Polariton Condensate near the Exceptional PointACS PHOTONICS, 2022, 9 (06) : 2079 - 2086Li, Yao论文数: 0 引用数: 0 h-index: 0机构: Tianjin Univ, Sch Sci, Dept Phys, Tianjin Key Lab Mol Optoelect Sci,Inst Mol Plus, Tianjin 300072, Peoples R China Tianjin Univ, Sch Sci, Dept Phys, Tianjin Key Lab Mol Optoelect Sci,Inst Mol Plus, Tianjin 300072, Peoples R ChinaMa, Xuekai论文数: 0 引用数: 0 h-index: 0机构: Univ Paderborn, Dept Phys, D-33098 Paderborn, Germany Univ Paderborn, Ctr Optoelect & Photon Paderborn CeOPP, D-33098 Paderborn, Germany Tianjin Univ, Sch Sci, Dept Phys, Tianjin Key Lab Mol Optoelect Sci,Inst Mol Plus, Tianjin 300072, Peoples R ChinaHatzopoulos, Zaharias论文数: 0 引用数: 0 h-index: 0机构: Fdn Res & Technol Hellas FORTH, Inst Elect Struct & Laser IESL, Iraklion 71110, Greece Tianjin Univ, Sch Sci, Dept Phys, Tianjin Key Lab Mol Optoelect Sci,Inst Mol Plus, Tianjin 300072, Peoples R ChinaSavvidis, Pavlos G.论文数: 0 引用数: 0 h-index: 0机构: Fdn Res & Technol Hellas FORTH, Inst Elect Struct & Laser IESL, Iraklion 71110, Greece Westlake Univ, Dept Phys, Key Lab Quantum Mat Zhejiang Prov, Hangzhou 310024, Zhejiang, Peoples R China Inst Nat Sci, Westlake Inst Adv Study, Hangzhou 310024, Zhejiang, Peoples R China Univ Crete, Dept Mat Sci & Technol, Iraklion 71003, Crete, Greece Tianjin Univ, Sch Sci, Dept Phys, Tianjin Key Lab Mol Optoelect Sci,Inst Mol Plus, Tianjin 300072, Peoples R ChinaSchumacher, Stefan论文数: 0 引用数: 0 h-index: 0机构: Univ Paderborn, Dept Phys, D-33098 Paderborn, Germany Univ Paderborn, Ctr Optoelect & Photon Paderborn CeOPP, D-33098 Paderborn, Germany Univ Arizona, Wyant Coll Opt Sci, Tucson, AZ 85721 USA Tianjin Univ, Sch Sci, Dept Phys, Tianjin Key Lab Mol Optoelect Sci,Inst Mol Plus, Tianjin 300072, Peoples R ChinaGao, Tingge论文数: 0 引用数: 0 h-index: 0机构: Tianjin Univ, Sch Sci, Dept Phys, Tianjin Key Lab Mol Optoelect Sci,Inst Mol Plus, Tianjin 300072, Peoples R China Tianjin Univ, Sch Sci, Dept Phys, Tianjin Key Lab Mol Optoelect Sci,Inst Mol Plus, Tianjin 300072, Peoples R China
- [22] Dynamics of the Formation and Decay of Coherence in a Polariton CondensatePHYSICAL REVIEW LETTERS, 2009, 103 (09)del Valle, E.论文数: 0 引用数: 0 h-index: 0机构: Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, EnglandSanvitto, D.论文数: 0 引用数: 0 h-index: 0机构: Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, EnglandAmo, A.论文数: 0 引用数: 0 h-index: 0机构: Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, EnglandLaussy, F. P.论文数: 0 引用数: 0 h-index: 0机构: Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, EnglandAndre, R.论文数: 0 引用数: 0 h-index: 0机构: CEA, CNRS, Inst NEEL, F-38042 Grenoble 9, France Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, EnglandTejedor, C.论文数: 0 引用数: 0 h-index: 0机构: Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, EnglandVina, L.论文数: 0 引用数: 0 h-index: 0机构: Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
- [23] From Excitonic to Photonic Polariton Condensate in a ZnO-Based MicrocavityPHYSICAL REVIEW LETTERS, 2013, 110 (19)Li, Feng论文数: 0 引用数: 0 h-index: 0机构: CRHEA CNRS, F-06560 Valbonne, France Univ Nice Sophia Antipolis, F-06103 Nice, France CRHEA CNRS, F-06560 Valbonne, FranceOrosz, L.论文数: 0 引用数: 0 h-index: 0机构: Clermont Univ, CNRS, Inst Pascal, F-63177 Aubiere, France Univ Blaise Pascal, F-63177 Aubiere, France CRHEA CNRS, F-06560 Valbonne, France论文数: 引用数: h-index:机构:Bouchoule, S.论文数: 0 引用数: 0 h-index: 0机构: LPN CNRS, F-91460 Marcoussis, France CRHEA CNRS, F-06560 Valbonne, FranceBrimont, C.论文数: 0 引用数: 0 h-index: 0机构: Univ Montpellier 2, CNRS, Lab Charles Coulomb, UMR 5221, F-34095 Montpellier, France CRHEA CNRS, F-06560 Valbonne, FranceDisseix, P.论文数: 0 引用数: 0 h-index: 0机构: Clermont Univ, CNRS, Inst Pascal, F-63177 Aubiere, France Univ Blaise Pascal, F-63177 Aubiere, France CRHEA CNRS, F-06560 Valbonne, FranceGuillet, T.论文数: 0 引用数: 0 h-index: 0机构: Univ Montpellier 2, CNRS, Lab Charles Coulomb, UMR 5221, F-34095 Montpellier, France CRHEA CNRS, F-06560 Valbonne, FranceLafosse, X.论文数: 0 引用数: 0 h-index: 0机构: LPN CNRS, F-91460 Marcoussis, France CRHEA CNRS, F-06560 Valbonne, FranceLeroux, M.论文数: 0 引用数: 0 h-index: 0机构: CRHEA CNRS, F-06560 Valbonne, France CRHEA CNRS, F-06560 Valbonne, FranceLeymarie, J.论文数: 0 引用数: 0 h-index: 0机构: Clermont Univ, CNRS, Inst Pascal, F-63177 Aubiere, France Univ Blaise Pascal, F-63177 Aubiere, France CRHEA CNRS, F-06560 Valbonne, FranceMexis, M.论文数: 0 引用数: 0 h-index: 0机构: Univ Montpellier 2, CNRS, Lab Charles Coulomb, UMR 5221, F-34095 Montpellier, France CRHEA CNRS, F-06560 Valbonne, FranceMihailovic, M.论文数: 0 引用数: 0 h-index: 0机构: Clermont Univ, CNRS, Inst Pascal, F-63177 Aubiere, France Univ Blaise Pascal, F-63177 Aubiere, France CRHEA CNRS, F-06560 Valbonne, FrancePatriarche, G.论文数: 0 引用数: 0 h-index: 0机构: LPN CNRS, F-91460 Marcoussis, France CRHEA CNRS, F-06560 Valbonne, FranceReveret, F.论文数: 0 引用数: 0 h-index: 0机构: Clermont Univ, CNRS, Inst Pascal, F-63177 Aubiere, France Univ Blaise Pascal, F-63177 Aubiere, France CRHEA CNRS, F-06560 Valbonne, FranceSolnyshkov, D.论文数: 0 引用数: 0 h-index: 0机构: Clermont Univ, CNRS, Inst Pascal, F-63177 Aubiere, France Univ Blaise Pascal, F-63177 Aubiere, France CRHEA CNRS, F-06560 Valbonne, FranceZuniga-Perez, J.论文数: 0 引用数: 0 h-index: 0机构: CRHEA CNRS, F-06560 Valbonne, France CRHEA CNRS, F-06560 Valbonne, FranceMalpuech, G.论文数: 0 引用数: 0 h-index: 0机构: Clermont Univ, CNRS, Inst Pascal, F-63177 Aubiere, France Univ Blaise Pascal, F-63177 Aubiere, France CRHEA CNRS, F-06560 Valbonne, France
- [24] Spectrum and thermal fluctuations of a microcavity polariton Bose-Einstein condensatePHYSICAL REVIEW B, 2008, 77 (04)Sarchi, D.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, Inst Theoret Phys, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, Inst Theoret Phys, CH-1015 Lausanne, SwitzerlandSavona, V.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, Inst Theoret Phys, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, Inst Theoret Phys, CH-1015 Lausanne, Switzerland
- [25] Trapped Exciton-Polariton Condensate by Spatial Confinement in a Perovskite MicrocavityACS PHOTONICS, 2020, 7 (02) : 327 - 337Zhang, Shuai论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Univ Chinese Acad Sci, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaChen, Jie论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Univ Chinese Acad Sci, Beijing, Peoples R China Peking Univ, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaShi, Jia论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Univ Chinese Acad Sci, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaFu, Lei论文数: 0 引用数: 0 h-index: 0机构: Peking Univ, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaDu, Wenna论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Univ Chinese Acad Sci, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaSui, Xinyu论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Univ Chinese Acad Sci, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaMi, Yang论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaJia, Zhili论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaLiu, Fengjing论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Univ Chinese Acad Sci, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaShi, Jianwei论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaWu, Xianxin论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Univ Chinese Acad Sci, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaTang, Ning论文数: 0 引用数: 0 h-index: 0机构: Peking Univ, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaZhang, Qing论文数: 0 引用数: 0 h-index: 0机构: Peking Univ, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R ChinaLiu, Xinfeng论文数: 0 引用数: 0 h-index: 0机构: Natl Ctr Nanosci & Technol, Beijing, Peoples R China Natl Ctr Nanosci & Technol, Beijing, Peoples R China
- [26] Stable gray soliton pinned by a defect in a microcavity-polariton condensateOPTICS EXPRESS, 2015, 23 (19): : 24974 - 24983Chen, Ting-Wei论文数: 0 引用数: 0 h-index: 0机构: Chinese Culture Univ, Dept Optoelect Phys, Taipei 11114, Taiwan Chinese Culture Univ, Dept Optoelect Phys, Taipei 11114, TaiwanHsieh, Wen-Feng论文数: 0 引用数: 0 h-index: 0机构: Natl Chiao Tung Univ, Dept Photon, Hsinchu 30010, Taiwan Natl Chiao Tung Univ, Inst Electroopt Engn, Hsinchu 30010, Taiwan Chinese Culture Univ, Dept Optoelect Phys, Taipei 11114, TaiwanCheng, Szu-Cheng论文数: 0 引用数: 0 h-index: 0机构: Chinese Culture Univ, Dept Optoelect Phys, Taipei 11114, Taiwan Chinese Culture Univ, Dept Optoelect Phys, Taipei 11114, Taiwan
- [27] Ultralow Threshold Polariton Condensate in a Monolayer Semiconductor Microcavity at Room TemperatureNANO LETTERS, 2021, 21 (07) : 3331 - 3339Zhao, Jiaxin论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, SingaporeSu, Rui论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, SingaporeFieramosca, Antonio论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, SingaporeZhao, Weijie论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, SingaporeDu, Wei论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, SingaporeLiu, Xue论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore论文数: 引用数: h-index:机构:Sanvitto, Daniele论文数: 0 引用数: 0 h-index: 0机构: CNR NANOTEC Inst Nanotechnol, I-73100 Lecce, Italy Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, SingaporeLiew, Timothy C. H.论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore Nanyang Technol Univ, Natl Univ Singapore, Univ Cote dAzur,CNRS, Sorbonne Univ,MajuLab,Int Joint Res Unit UMI 3654, Singapore 637371, Singapore Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, SingaporeXiong, Qihua论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore
- [28] Polariton condensate coherence in planar microcavities in a magnetic fieldSEMICONDUCTORS, 2016, 50 (12) : 1609 - 1613Chernenko, A. V.论文数: 0 引用数: 0 h-index: 0机构: Russian Acad Sci, Inst Solid State Phys, Inst Skaya Ul 2, Chernogolovka 142432, Moscow Oblast, Russia Russian Acad Sci, Inst Solid State Phys, Inst Skaya Ul 2, Chernogolovka 142432, Moscow Oblast, RussiaRahimi-lman, A.论文数: 0 引用数: 0 h-index: 0机构: Univ Wurzburg, Wilhelm Conrad Roentgen Res Ctr Complex Mat Syst, Tech Phys, D-97074 Wurzburg, Germany Philipps Univ Marburg, Dept Phys, D-35032 Marburg, Germany Philipps Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany Russian Acad Sci, Inst Solid State Phys, Inst Skaya Ul 2, Chernogolovka 142432, Moscow Oblast, RussiaFischer, J.论文数: 0 引用数: 0 h-index: 0机构: Univ Wurzburg, Wilhelm Conrad Roentgen Res Ctr Complex Mat Syst, Tech Phys, D-97074 Wurzburg, Germany Russian Acad Sci, Inst Solid State Phys, Inst Skaya Ul 2, Chernogolovka 142432, Moscow Oblast, RussiaAmthor, M.论文数: 0 引用数: 0 h-index: 0机构: Univ Wurzburg, Wilhelm Conrad Roentgen Res Ctr Complex Mat Syst, Tech Phys, D-97074 Wurzburg, Germany Russian Acad Sci, Inst Solid State Phys, Inst Skaya Ul 2, Chernogolovka 142432, Moscow Oblast, RussiaSchneider, C.论文数: 0 引用数: 0 h-index: 0机构: Univ Wurzburg, Wilhelm Conrad Roentgen Res Ctr Complex Mat Syst, Tech Phys, D-97074 Wurzburg, Germany Russian Acad Sci, Inst Solid State Phys, Inst Skaya Ul 2, Chernogolovka 142432, Moscow Oblast, RussiaReitzenstein, S.论文数: 0 引用数: 0 h-index: 0机构: Univ Wurzburg, Wilhelm Conrad Roentgen Res Ctr Complex Mat Syst, Tech Phys, D-97074 Wurzburg, Germany Tech Univ Berlin, Inst Festkoerperphys, D-10623 Berlin, Germany Russian Acad Sci, Inst Solid State Phys, Inst Skaya Ul 2, Chernogolovka 142432, Moscow Oblast, RussiaForchel, A.论文数: 0 引用数: 0 h-index: 0机构: Univ Wurzburg, Wilhelm Conrad Roentgen Res Ctr Complex Mat Syst, Tech Phys, D-97074 Wurzburg, Germany Russian Acad Sci, Inst Solid State Phys, Inst Skaya Ul 2, Chernogolovka 142432, Moscow Oblast, RussiaHoefling, S.论文数: 0 引用数: 0 h-index: 0机构: Univ Wurzburg, Wilhelm Conrad Roentgen Res Ctr Complex Mat Syst, Tech Phys, D-97074 Wurzburg, Germany Russian Acad Sci, Inst Solid State Phys, Inst Skaya Ul 2, Chernogolovka 142432, Moscow Oblast, Russia
- [29] COHERENCE FORMATION DYNAMICS OF AN EXCITON-POLARITON CONDENSATE11TH INTERNATIONAL CONFERENCE ON OPTICS OF EXCITONS IN CONFINED SYSTEMS (OECS11), 2010, 210Nardin, G.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, CH-1015 Lausanne, SwitzerlandLagoudakis, K. G.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, CH-1015 Lausanne, SwitzerlandPietka, B.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, CH-1015 Lausanne, SwitzerlandWouters, M.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, CH-1015 Lausanne, SwitzerlandRichard, M.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, CH-1015 Lausanne, SwitzerlandBaas, A.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, CH-1015 Lausanne, SwitzerlandAndre, R.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, CH-1015 Lausanne, SwitzerlandDang, Le Si论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, CH-1015 Lausanne, SwitzerlandDeveaud-Pledran, B.论文数: 0 引用数: 0 h-index: 0机构: Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland
- [30] Dominant effect of polariton-polariton interactions on the coherence of the microcavity optical parametric oscillatorPHYSICAL REVIEW LETTERS, 2006, 97 (09)Krizhanovskii, D. N.论文数: 0 引用数: 0 h-index: 0机构: Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, EnglandSanvitto, D.论文数: 0 引用数: 0 h-index: 0机构: Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, EnglandLove, A. P. D.论文数: 0 引用数: 0 h-index: 0机构: Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, EnglandSkolnick, M. S.论文数: 0 引用数: 0 h-index: 0机构: Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, EnglandWhittaker, D. M.论文数: 0 引用数: 0 h-index: 0机构: Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, EnglandRoberts, J. S.论文数: 0 引用数: 0 h-index: 0机构: Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England