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用连续调谐CO₂激光器研究InSb自由载流子法拉第旋转

Study of the Free Carrier Faraday Rotation in InSb through a Tunable CW CO₂ Laser

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【作者】邢启江；陈辰嘉；王学忠；史守旭；朱印康；王威礼；曹树石；刘继周；刘彩霞；

【Author】 Xing Qijiang/Department of Physics, Peking UniversityChen Chenjia/Department of Physics, Peking UniversityWang Xuezhong/Department of Physics, Peking UniversityShi Shouxu/Department of Physics, Peking UniversityZhu Yinkang/Department of Physics, Peking UniversityWang Weili/Department of Physics, Peking UniversityCao Shushi/Department of Physics, Peking UniversityLiu Jizhou/Department of Physics, Peking UniversityLiu Caixia/Department of Physics, Peking University

【机构】北京大学物理系；北京大学物理系；

【摘要】在室温、液氮和液氦温度下,首次用连续调谐的CO₂激光器研究了n-InSb自由载流子法拉第旋转.对于载流子浓度为3.26 ×10¹⁶cm^-3的样品,测得电子的有效质量:m^*（10K）=0.0172m,m^*（77K）=0.0177m.m^*（296K）= 0.0192m.精确测量表明:当波长λ<9.5μm时,带间法拉第旋转的影响就越来越明显.更多还原

【Abstract】 The free carrier Faraday rotation in n-InSb has been studied by using a tunable CWCO₂ laser for the first time at room temperature,liquid nitrogen and liquid helium tempe-rature.Measurements on carrier concentration of 3.26×10¹⁶ cm^-3 are made to have the effe-ctive mass m^* （10K） =0.0172 m, m^*（77K）=0.0177 m and m^*（296K） =0.0192 m.Theaccurate measurements show that the effect of interband Faraday rotation becomes moreapparent when wavelength is less than 9.5 micron.更多还原