Large second-harmonic response of C60 thin films
Xiaoyu WangDepartment of Materials Science and Engineering, Materials Research Center, Northwestern University, Evanston, Illinois 60208T. G. ZhangDepartment of Physics and Astronomy, Materials Research Center, Northwestern University, Evanston, Illinois 60208Weiping LinDepartment of Physics and Astronomy, Materials Research Center, Northwestern University, Evanston, Illinois 60208Sheng Zhong LiuDepartment of Chemistry, Northwestern University, Evanston, Illinois 60208G. K. L. WongDepartment of Physics and Astronomy, Materials Research Center, Northwestern University, Evanston, Illinois 60208Manfred M. KappesDepartment of Chemistry, Northwestern University, Evanston, Illinois 60208R. P. H. ChangDepartment of Materials Science and Engineering, Materials Research Center, Northwestern University, Evanston, Illinois 60208J. B. KettersonDepartment of Physics and Astronomy, Materials Research Center, Northwestern University, Evanston, Illinois 60208
1992en
ABI
Annotatsiya
Second harmonic generation measurements were performed using 1.064 μm pulses provided by a Nd:YAG laser. A bulk second-order susceptibility χ(2)z, zz = 2.1 × 10 − 9 esu was observed at room temperature, which is about 1.5 times the χ(2) value of quartz. χ(2) values in a poling field were studied as a function of temperature; the largest value occurred at a nominal temperature of 140 °C where χ(2) is ten times larger than the room temperature value.
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