Experimental observation of negative group velocity in C60 PMMA |
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| Authors: | Hao Wang Yundong Zhang Lei Ma Zhusong He He Tian Nan Wang Ping Yuan |
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| Institution: | aNational Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin 150080, People's Republic of China |
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| Abstract: | The authors experimentally observed the superluminal propagation at negative group velocity in C60 polymethyl methacrylate (PMMA) firstly. The largest time advancement of 7.61 ms was obtained at 1 mg/cm3 of sample concentration, the corresponding group velocity was −0.657 m/s. Fast light in C60 PMMA offers several advantages over liquids or vapors for a variety of possible applications: (i) easy for experimental measurement and practical applications (ii) easy for manufacture, (iii) sample concentration is another convenient parameter to vary the signal delay. |
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| Keywords: | Negative group velocity C60 PMMA |
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