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A high-performance laser energy meter based on anisotropic Seebeck effect in a strongly correlated electronic thin film |
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| Authors: | G-Y Zhang H-R Zheng W-H Huang X-Y Zhang D-L Gao H Zhang P-X Zhang T-Y Tseng H-U Habermeier C-T Lin H-H Cheng |
| Institution: | 1. Center for Condensed Matter Science, National Taiwan University, Taipei, 106, Taiwan 2. Department of Electronics Engineering and Institute of Electronics, National Chiao Tung University, Hsinchu, 300, Taiwan 3. Hefei National Laboratory for Physical Science at Microscal, University of Science and Technology of China, Hefei, 230026, People’s Republic of China 4. Department of Precision Machinery and Instrumentation, University of Science and Technology of China, Hefei, 230026, People’s Republic of China 5. School of Physics and Information Technology, Shaanxi Normal University, Xi’an, 710062, People’s Republic of China 6. Institute of Advanced Materials for Photoelectronics, Kunming University of Science and Technology, Kunming, 650051, People’s Republic of China 7. Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569, Stuttgart, Germany |
| Abstract: | We have developed a high-performance laser energy meter based on anisotropic Seebeck effect in a strongly correlated electronic (SCE) thin film. SCE thin films, typically represented by high-temperature superconductor (HTS) cuprate and colossal magnetoresistance (CMR) manganite thin films, demonstrate tremendous anisotropic Seebeck effect. In this study, a La2/3Ca1/3MnO3 thin film grown on a tilted LaAlO3 substrate is tested with the fundamental, the second, the third, and the fourth harmonics (1064, 532, 355, 266 nm, respectively) of a Q-switched Nd:YAG laser over a wide range of temperatures from room temperature to 16 K. The peak-value of the laser-induced thermoelectric voltage signal shows a good linear relationship with the laser energy per pulse in the measured wavelength and temperature ranges. The combined advantages over other commercial laser detectors such as nanosecond-order response and spectrally broad and flat response over a wide range of temperatures, in situ real-time measurement, and energy savings, make the device an ideal candidate for next-generation laser detectors and laser power/energy meters. |
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