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33 results on '"Tu, Chien Ming"'

1. Three-dimensional ultrafast charge-density-wave dynamics in CuTe

Author

Nhat Quyen, Nguyen, Tzeng, Wen-Yen, Hsu, Chih-En, Lin, I-An, Chen, Wan-Hsin, Jia, Hao-Hsiang, Wang, Sheng-Chiao, Liu, Cheng-En, Chen, Yu-Sheng, Chen, Wei-Liang, Chou, Ta-Lei, Wang, I-Ta, Kuo, Chia-Nung, Lin, Chun-Liang, Wu, Chien-Te, Lin, Ping-Hui, Weng, Shih-Chang, Cheng, Cheng-Maw, Kuo, Chang-Yang, Tu, Chien-Ming, Chu, Ming-Wen, Chang, Yu-Ming, Lue, Chin Shan, Hsueh, Hung-Chung, and Luo, Chih-Wei

Published
2024
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2. Twisted oxide lateral homostructures with conjunction tunability

Author

Wu, Ping-Chun, Wei, Chia-Chun, Zhong, Qilan, Ho, Sheng-Zhu, Liou, Yi-De, Liu, Yu-Chen, Chiu, Chun-Chien, Tzeng, Wen-Yen, Chang, Kuo-En, Chang, Yao-Wen, Zheng, Junding, Chang, Chun-Fu, Tu, Chien-Ming, Chen, Tse-Ming, Luo, Chih-Wei, Huang, Rong, Duan, Chun-Gang, Chen, Yi-Chun, Kuo, Chang-Yang, and Yang, Jan-Chi

Published
2022
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4. Pulsed THz radiation due to phonon-polariton effect in [110] ZnTe crystal

Author

Tu, Chien-Ming, Ku, Shin-An, Chu, Wei-Chen, Luo, Chih-Wei, Chen, Jeng-Chung, and Chi, Cheng-Chung

Subjects
Physics - Optics
Abstract

Pulsed terahertz (THz) radiation, generated through optical rectification (OR) by exciting [110] ZnTe crystal with ultrafast optical pulses, typically consists of only a few cycles of electromagnetic field oscillations with a duration about a couple of picoseconds. However, it is possible, under appropriate conditions, to generate a long damped oscillation tail (LDOT) following the main cycles. The LDOT can last tens of picoseconds and its Fourier transform shows a higher and narrower frequency peak than that of the main pulse. We have demonstrated that the generation of the LDOT depends on both the duration of the optical pulse and its central wavelength. Furthermore, we have also performed theoretical calculations based upon the OR effect coupled with the phonon-polariton mode of ZnTe and obtained theoretical THz waveforms in good agreement with our experimental observation., Comment: 9 pages, 5 figures

Published
2012
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8. Nematic electron and phonon dynamics in SnS crystals

Author

Quyen, Nguyen Nhat, primary, Hong, Tz-Ju, additional, Hsu, Chin En, additional, Tzeng, Wen-Yen, additional, Tu, Chien-Ming, additional, Kuo, Chia-Nung, additional, Hsueh, Hung-Chung, additional, Lue, Chin Shan, additional, and Luo, Chih-Wei, additional

Published
2022
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10. Using Exciton/Trion Dynamics to Spatially Monitor the Catalytic Activities of MoS2 during the Hydrogen Evolution Reaction

Author

Hsiao, Fu-He, primary, Chung, Cheng-Chu, additional, Chiang, Chun-Hao, additional, Feng, Wei-Neng, additional, Tzeng, Wen-Yen, additional, Lin, Hung-Min, additional, Tu, Chien-Ming, additional, Wu, Heng-Liang, additional, Wang, Yu-Han, additional, Woon, Wei-Yen, additional, Chen, Hsiao-Chien, additional, Chen, Ching-Hsiang, additional, Lo, Chao-Yuan, additional, Lai, Man-Hong, additional, Chang, Yu-Ming, additional, Lu, Li-Syuan, additional, Chang, Wen-Hao, additional, Chen, Chun-Wei, additional, and Luo, Chih-Wei, additional

Published
2022
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12. Topological Proximity-Induced Dirac Fermion in Two-Dimensional Antimonene

Author

Su, Shu Hsuan, primary, Chuang, Pei-Yu, additional, Chen, Hsin-Yu, additional, Weng, Shih-Chang, additional, Chen, Wei-Chuan, additional, Tsuei, Ku-Ding, additional, Lee, Chao-Kuei, additional, Yu, Shih-Hsun, additional, Chou, Mitch M.-C., additional, Tu, Li-Wei, additional, Jeng, Horng-Tay, additional, Tu, Chien-Ming, additional, Luo, Chih-Wei, additional, Cheng, Cheng-Maw, additional, Chang, Tay-Rong, additional, and Huang, Jung-Chun Andrew, additional

Published
2021
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18. FemtoMAX – an X-ray beamline for structural dynamics at the short-pulse facility of MAX IV

Author

Enquist, Henrik, primary, Jurgilaitis, Andrius, additional, Jarnac, Amelie, additional, Bengtsson, Åsa U. J., additional, Burza, Matthias, additional, Curbis, Francesca, additional, Disch, Christian, additional, Ekström, J. Carl, additional, Harb, Maher, additional, Isaksson, Lennart, additional, Kotur, Marija, additional, Kroon, David, additional, Lindau, Filip, additional, Mansten, Erik, additional, Nygaard, Jesper, additional, Persson, Anna I. H., additional, Pham, Van Thai, additional, Rissi, Michael, additional, Thorin, Sara, additional, Tu, Chien-Ming, additional, Wallén, Erik, additional, Wang, Xiaocui, additional, Werin, Sverker, additional, and Larsson, Jörgen, additional

Published
2018
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19. Helicity-dependent terahertz emission spectroscopy of topological insulator Sb2Te3 thin films

Author

Tu, Chien-Ming, primary, Chen, Yi-Cheng, additional, Huang, Ping, additional, Chuang, Pei-Yu, additional, Lin, Ming-Yu, additional, Cheng, Cheng-Maw, additional, Lin, Jiunn-Yuan, additional, Juang, Jenh-Yih, additional, Wu, Kaung-Hsiung, additional, Huang, Jung-Chun A., additional, Pong, Way-Faung, additional, Kobayashi, Takayoshi, additional, and Luo, Chih-Wei, additional

Published
2017
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23. Manifestation of a Second Dirac Surface State and Bulk Bands in THz Radiation from Topological Insulators

Author

Tu, Chien-Ming, primary, Yeh, Tien-Tien, additional, Tzeng, Wen-Yen, additional, Chen, Yi-Ru, additional, Chen, Hsueh-Ju, additional, Ku, Shin-An, additional, Luo, Chih-Wei, additional, Lin, Jiunn-Yuan, additional, Wu, Kaung-Hsiung, additional, Juang, Jenh-Yih, additional, Kobayashi, Takayoshi, additional, Cheng, Cheng-Maw, additional, Tsuei, Ku-Ding, additional, Berger, Helmuth, additional, Sankar, Raman, additional, and Chou, Fang-Cheng, additional

Published
2015
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24. THz Generation and Detection on Dirac Fermions in Topological Insulators

Author

Luo, Chih Wei, Chen, Hsueh-Ju, Tu, Chien Ming, Lee, Chia Ching, Ku, Shin An, Tzeng, Wen Yen, Yeh, Tien Tien, Chiang, Meng Chi, Wang, Harn Jiunn, Chu, Wei Chen, Lin, Jiunn-Yuan, Wu, Kaung Hsiung, Juang, Jenh Yih, Kobayashi, Takayoshi, Cheng, Cheng-Maw, Chen, Ching-Hung, Tsuei, Ku-Ding, Berger, Helmuth, Sankar, Raman, Chou, Fang Cheng, and Yang, Hung Duen

Subjects
Condensed Matter - Materials Science, Condensed Matter::Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Mathematics::Analysis of PDEs, Physics::Optics, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences
Abstract

This study shows that a terahertz (THz) wave can be generated from the (001) surface of cleaved Bi$_{\textrm{2}}$Se$_{\textrm{3}}$ and Cu-doped Bi$_{\textrm{2}}$Se$_{\textrm{3}}$ single crystals using 800 nm femtosecond pulses. The generated THz power is strongly dependent on the carrier concentration of the crystals. An examination of the dependence reveals the two-channel free carrier absorption to which Dirac fermions are indispensable. Dirac fermions in Bi$_{\textrm{2}}$Se$_{\textrm{3}}$ are significantly better absorbers of THz radiation than bulk carriers at room temperature. Moreover, the characteristics of THz emission confirm the existence of a recently proposed surface phonon branch that is normalized by Dirac fermions., Comment: 5 pages, 4 figures, 1 table

Published
2013
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27. Terahertz Generation: THz Generation and Detection on Dirac Fermions in Topological Insulators (Advanced Optical Materials 11/2013)

Author

Luo, Chih Wei, primary, Chen, Hsueh-Ju, additional, Tu, Chien Ming, additional, Lee, Chia Ching, additional, Ku, Shin An, additional, Tzeng, Wen Yen, additional, Yeh, Tien Tien, additional, Chiang, Meng Chi, additional, Wang, Harn Jiunn, additional, Chu, Wei Chen, additional, Lin, Jiunn-Yuan, additional, Wu, Kaung Hsiung, additional, Juang, Jenh Yih, additional, Kobayashi, Takayoshi, additional, Cheng, Cheng-Maw, additional, Chen, Ching-Hung, additional, Tsuei, Ku-Ding, additional, Berger, Helmuth, additional, Sankar, Raman, additional, Chou, Fang Cheng, additional, and Yang, Hung Duen, additional

Published
2013
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28. THz Generation and Detection on Dirac Fermions in Topological Insulators

Author

Luo, Chih Wei, primary, Chen, Hsueh‐Ju, additional, Tu, Chien Ming, additional, Lee, Chia Ching, additional, Ku, Shin An, additional, Tzeng, Wen Yen, additional, Yeh, Tien Tien, additional, Chiang, Meng Chi, additional, Wang, Harn Jiunn, additional, Chu, Wei Chen, additional, Lin, Jiunn‐Yuan, additional, Wu, Kaung Hsiung, additional, Juang, Jenh Yih, additional, Kobayashi, Takayoshi, additional, Cheng, Cheng‐Maw, additional, Chen, Ching‐Hung, additional, Tsuei, Ku‐Ding, additional, Berger, Helmuth, additional, Sankar, Raman, additional, Chou, Fang Cheng, additional, and Yang, Hung Duen, additional

Published
2013
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32. Using Exciton/Trion Dynamics to Spatially Monitor the Catalytic Activities of MoS2during the Hydrogen Evolution Reaction

Author

Hsiao, Fu-He, Chung, Cheng-Chu, Chiang, Chun-Hao, Feng, Wei-Neng, Tzeng, Wen-Yen, Lin, Hung-Min, Tu, Chien-Ming, Wu, Heng-Liang, Wang, Yu-Han, Woon, Wei-Yen, Chen, Hsiao-Chien, Chen, Ching-Hsiang, Lo, Chao-Yuan, Lai, Man-Hong, Chang, Yu-Ming, Lu, Li-Syuan, Chang, Wen-Hao, Chen, Chun-Wei, and Luo, Chih-Wei

Abstract

The adsorption and desorption of electrolyte ions strongly modulates the carrier density or carrier type on the surface of monolayer-MoS2catalyst during the hydrogen evolution reaction (HER). The buildup of electrolyte ions onto the surface of monolayer MoS2during the HER may also result in the formation of excitons and trions, similar to those observed in gate-controlled field-effect transistor devices. Using the distinct carrier relaxation dynamics of excitons and trions of monolayer MoS2as sensitive descriptors, an in situ microcell-based scanning time-resolved liquid cell microscope is set up to simultaneously measure the bias-dependent exciton/trion dynamics and spatially map the catalytic activity of monolayer MoS2during the HER. This operando probing technique used to monitor the interplay between exciton/trion dynamics and electrocatalytic activity for two-dimensional transition metal dichalcogenides provides an excellent platform to investigate the local carrier behaviors at the atomic layer/liquid electrolyte interfaces during electrocatalytic reaction.

Published
2022
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33. Using Exciton/Trion Dynamics to Spatially Monitor the Catalytic Activities of MoS 2 during the Hydrogen Evolution Reaction.

Author

Hsiao FH, Chung CC, Chiang CH, Feng WN, Tzeng WY, Lin HM, Tu CM, Wu HL, Wang YH, Woon WY, Chen HC, Chen CH, Lo CY, Lai MH, Chang YM, Lu LS, Chang WH, Chen CW, and Luo CW

Abstract

The adsorption and desorption of electrolyte ions strongly modulates the carrier density or carrier type on the surface of monolayer-MoS 2 catalyst during the hydrogen evolution reaction (HER). The buildup of electrolyte ions onto the surface of monolayer MoS 2 during the HER may also result in the formation of excitons and trions, similar to those observed in gate-controlled field-effect transistor devices. Using the distinct carrier relaxation dynamics of excitons and trions of monolayer MoS 2 as sensitive descriptors, an in situ microcell-based scanning time-resolved liquid cell microscope is set up to simultaneously measure the bias-dependent exciton/trion dynamics and spatially map the catalytic activity of monolayer MoS 2 during the HER. This operando probing technique used to monitor the interplay between exciton/trion dynamics and electrocatalytic activity for two-dimensional transition metal dichalcogenides provides an excellent platform to investigate the local carrier behaviors at the atomic layer/liquid electrolyte interfaces during electrocatalytic reaction.

Published
2022
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