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Professor Pan,Ci-Ling
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Office:+886-3-5742275 (PHYS R231)
Student Office:+886-3-5162576 (PHYS R218)
Laboratory:+886-3-5742552 (PHYS R219)  



● 1979, Ph.D. (Physics), Colorado State University, Ft. Collins, Colorado, U.S.A. 
● 1975, M.S. (Physics), Colorado State University, Ft. Collins, Colorado, U.S.A. 
● 1971, B.S. (Physics), Tunghai University, Taichung, Taiwan

Professional Experience

Current position:

2009-present, Professor and Tsing Hua Chair, Department of Physics and Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan


National Tsing Hua University, Hsinchu, Taiwan

    Vice-President, Office of Research & Development (2/14  to 7/16)

    Director, Operation-Center for Industrial Collaboration (2/14 to 7/16)

    Director, Center for Photonics Research (8/09 to 7/14)

    Professor and Chairman, Department of Physics (8/11 to 1/14)

    Professor, Department of Physics (2/09 to date)

        Institute of Photonics Technologies (joint appointment)

● National Chiao Tung University, Hsinchu, Taiwan
    University Chair Prof., 11/03 to 01/09
    Chair, Department of Photonics, 8/04 to 7/06
    Prof., Inst. Electro-Opt. Eng., 8/87 to 01/09
    Chair, Inst. Electro-Opt. Eng., 8/92 through 7/95
    Assoc. Prof., Inst. Electro-Opt. Eng., 2/81 through 7/87

● National Science Council, R.O.C.
    Coordinator, Optics & Photonics Program, 1/96 through 12/99

● The Chinese University of Hong Kong, Shatin, NT, Hong Kong
    Visiting Prof., Dept. of Electronic Engn., 1/08 to 6/08

● Osaka University, Osaka, Japan
    Guest Prof., Institute of Laser Engineering, 3/04 to 6/04

● University of California, Berkeley, California, USA
    Visiting Scholar, Depts. Of Physics and EECS, 2/86 through 1/87

● Colorado State University, Ft. Collins, Colorado, USA
    Postdoctoral Fellow, Chem. Dept., 8/79 through 1/81

● Marine Corps, Taiwan, ROC
    2nd Lt. (Mandatory Military Service), 9/71 through 6/73 

Honors and Awards

● Member, the Phi Tau Phi Honor Society, elected 1991.
● NSC Outstanding Research Award, ‘90-‘92, ‘92-‘94, ‘94-‘96.
● NSC Research Fellow, ‘96 –‘02.
● Merit NSC Research Fellow Award, 2002.
● Fellow, Photonic Society of Chinese Americans (PSC), 1998.
● Y. Z. Hsu Communication and Photonics Chair, 2003.
● Fellow, the Optical Society (OSA), 2004.
● Fellow, International Society of Optical Engineering. (SPIE), 2004.
● Academic Award, Ministry of Education, 2004.
● Engineering Medal, the Optical Engineering Society (ROCOES), 2004.
● Fellow, Physical Society of the Republic of China (PSROC), 2005.
● Outstanding Engineering Professor Award, the Chinese Institute of Engineers,2006.
● Pan Wan Yuen Research Excellence Award, 2007.   
● NSC “Science-50” citation, 2008.

● Chair, the Univ. System of Taiwan, 1/09-12/11.
● Fellow, American Physical Society (APS), 2009.
Fellow, Institute of Electrical and Electronic Engineers (IEEE), 2012.
 Outstanding Scholarship Award, Foundation For The Advancement of  Outstanding Scholarship, 2012-2015.
 TECO Award, TECO Technology Foundation, 2012.

● Outstanding Alumni Award, Tunghai University, 2013.

● Academian, Asia Pacific Academy of Materials, 2013.

● Distinguished Lecturer, IEEE EDS (2016 to date)

● Corresponding Member, International Academy of Engineering, 2017.

● Outstanding Honor Award, THS Foundation, 2017

Research Fields

  1. Laser Science

  2. Ultrafast Optics and Optoelectronics

  3. THz Optics and Photonics

  4. Liquid Crystal Optics and Photonics

Current Research projects  (Updated on November 25, 2016)

[ 1 ] Functional THz Photonic Elements and their Applications  (MOST, Aug. 1, 2015 - July 31, 2018)

    We propose to study terahertz functional photonic component and modules for the photonics-enabled post 5G network. These would be potentially useful for applications in (i) multi-gigabit THz wireless-over-fiber communication services; (ii) photonic generation of sub-millimeter waves and signal processing; (iii) photonics-based high-spatial-resolution 3D imaging Radar.

[ 2 ] Noise-like Pulsed Fiber Lasers: Physical Mechanisms and THz Applications (MOST, August 1, 2017 - July 31, 2019)

    In this work, we propose to generate and characterize noise-like pulses from an Yb-doped fiber laser. Emphasis will be on the control of NLP generation and its coherence properties, particularly in relevance to the applications of NLP to optical coherence tomography (OCT). Besides, understanding the physical mechanism of generating NLPs will help shed light on the nonlinear physics of hot topics such as “the optical rogue wave”. We will also explore generation of broadband “white” THz signals, investigate its properties. We will look into various applications of this approach, imaging in particular. 

[ 3 ] Research and Development of kilowatt-class Yb-doped fiber lasers and applications, PI (MOST Industrial co-op with Cleverwave Corp. , Nov. 1, 2017 - Oct. 31, 2018)

    Industry 4.0 has become the mainstream trust of today’s manufacturing industry. The manufacturing sector will require intelligent production lines to be able to meet the highly adaptive, efficient use of resources, and integrate various manufacturing processes. In the past decades, laser processing has been proven to be very convenient and efficient processing tools. Laser technology, therefore, is widely used in manufacturing, Taiwan as well. The key element for laser processing i.e. : the “Laser source”, however is still mostly imported from abroad. Therefore, how to overcome the so-called “head-less” issue is critical for Taiwan.

    Fiber laser is a rising star for laser processing. These lasers exhibit high energy conversion efficiency, good beam quality, compactness, and low cost. It can be operated with low and high output energy, pulsed or continuous wave (CW) mode. High power CW fiber lasers with excellent beam performance, can be used in cutting, marking, drilling, welding for metal material.

    In collaboration with Cleverwave Technology Inc. (虹竣科技), we propose to develop high power CW fiber laser technology. We expect to develop output power approaching 800 watts in a prototype system. The ultimate goal is research and development of a kilowatts-class CW fiber laser. The specifications of these lasers will be comparable to those listed by international companies. The possible applications of this technology such as high-speed metal cutting, drilling, welding, including sintering for 3D printing of high-hardness metallic objects will also be explored.

[ 4 ] Fast Terahertz Imaging System based on Single-Pixel Compressive Sensing and Spatial Modulator, PI (Science Park R&D Endeavor Project with ACE Biomedical Solution Co., Ltd. , May 1, 2017 - April 30, 2018)

    THz (1THz = 1012 Hz) imaging systems are in demand for medical diagnostics, non-destructive testing and security applications. Nonetheless, such imaging systems are not widely employed due to limitation of available technologies. Semiconductor-based imagers, e.g., CCD or CMOS cameras, are not avaialbe in the terahertz frequency range. We propose to construct Terahertz Single-Pixel imaging systems based Terahertz spatial light modulators (SLMs). Objects need not be scannd and there is no need for an arrayed detector. Image formation is based on the theory of compressed sensing, which permits the reconstruction of an N-by-N pixeled image using much fewer than N2 measurements. Potential dvantages of this approach include low-cost, indigenously developed technology, high-frame-rate, and high-fidelity.

[ 5 ] Carrier Dynamics and Electrical Properties of LargE Bandgap Semiconductors investigated by Terahertz Spectroscopy (CELESTA, MoST-ANR Bilaternal Research Project, year 1, Jan. 1, 2018 - Dec. 31, 2018)

    In this Taiwan-France project, we aim at addressing carrier dynamics in large bandgap materials, like ITO (3.7~3.9 eV), TiO2 (3.2 eV), GaN (3.4 eV), etc. ITO and GaN are important for high-speed electronics or optoelectronics while TiOis important for application such as water catalysis for removing pollutants. In both cases, material nano-structuration (nanorods or nanowhiskers) is expected to yield exotic features. For example, the Taiwanese group shows that ITO nanostructures exhibit a significant increase in transmittance (from 9% to 70% up to 15 THz) compared to the bulk film while InN nanorods can enhance photo-excited THz emission. In the proposed joint work, new designs will be tested during this project to provide optimized ITO material and nanostructures. These samples will then be fully characterized. Their electrical conductivity will be investigated by THz-TDS. The dynamics of the carrier population will be studied by UV pump-THz probe time-resolved spectroscopy. For comparison, TiO2 nanofilms and GaN nanostructures will also be studied.

    The Taiwanese groups will leverage their expertise in THz technologies, metamaterials, nanodevices and solar cells to design, fabricate and characterize the samples, e.g., using a very broadband THz-TDS system based on THz generation and detection in air. Complementary THz conductivity characterization (polarization, scattering…) will be performed in France, at the IMEP-LAHC Institute (Université Savoie Mont-Blanc), in particular UV-THz pump-and-probe measurements. Ultimately, the French group will study electron injection in water from optically excited TiO2 in order to achieve a more comprehensive understanding of processes involved in water catalysis in solar-excited depollution systems.

    The project can have a real impact on display and optoelectronics devices as well as high-speed electronics since large bandgap semiconductors are a key material in these applications. Moreover, the knowledge acquired during the project in the domain of UV-induced carrier injection of water makes it also relevant to applications in environmental improvement and water purification.

Selected Publications

Prof. Pan has published more than 250 refereed journal papers and 5 book chapters to date. He also holds 21 Taiwan patents and 14 US patents. A full list of his publications is available online at See also

  1. F. Ganikhanov, G. -R. Lin, W. -C. Chen, C. -S. Chang, and Ci-Ling Pan*, “Subpicosecond carrier lifetimes in arsenic-ion-implanted GaAs,” Appl. Phys. Lett.  67(1995)3465 (Pioneering paper on GaAs:As+ as an ultrafast photoconductor). See also, Gong-Ru Lin, Wen-Chung Chen, Shyh-Chin Chao, C.-S. Chang, Kaung-Hsiung Wu, T. M. Hsu, W. C. Lee, and Ci-Ling Pan* “Material and Ultrafast Optoelectronic Properties of Highly Resistive Arsenic-ion-implanted GaAs,” IEEE J. Quantum Electron., 34(1998)1740.
  2. Chi-Leun Wang and Ci-Ling Pan*, "Tunable Dual-wavelength Operation of a Diode Array with an External Grating-loaded Cavity", Appl. phys. Lett. 64(1994)3089 (Generic laser cavity design for collinear, linearly polarized, tunable dual-wavelength output). See also, Ci-Ling Pan and Chi-Luen Wang, “A novel tunable dual-wavelength external-cavity laser diode array and its applications,” invited paper, Optical and Quantum Electronics 28(1996)1239, U.S. Patent. 5,524,012.
  3. T. R. Tsai, C. Y. Chen, C.-L. Pan*, R.-P. Pan and X.-C. Zhang, “THz Time-Domain Spectroscopy Studies of the Optical Constants of the Nematic Liquid Crystal 5CB,” Appl. Opt., 42(2003)2372 (Demonstrate feasibility of Liquid Crystal THz photonics). See also, Chan-Shan Yang, Chia-Jen Lin, Ru-Pin Pan*, Christopher Que, Kohji Yamamoto, Masahiko Tani, and Ci-Ling Pan*, “The Complex Refractive Indices of the Liquid Crystal Mixture E7 in the THz Frequency Range,” J. Opt. Soc. Am. B, 27(2010)1866.
  4. Ci-Ling Pan*, Jin-Yuen Zhang, Jung Y. Huang, and Chao-Kuei Lee, A blue-light generating Femtosecond wavelength-tunable Non-collinear Optical Parametric Amplifier,” Taiwan patent I239128, US patent 7106498 B2, 2006. (Femtosecond laser pulses that are tunable from 380 to 460 nm are directly generated the BBO OPA crystal,) see also Chao-Kuei Lee, Jin-Yuan Zhang, J. Y. Huang and Ci-Ling Pan, “Generation of Femtosecond Laser Pulses Tunable from 380 nm to 465 nm via Cascaded Nonlinear Optical Mixing in a Noncollinear Optical Parametric Amplifier with a Type-I Phase Matched BBO Crystal,” Optics Express 11(2003)1702.
  5. Chao-Yuan Chen, Cho-Fan Hsieh, Yea-Feng Lin, Ru-Pin Pan*, and Ci-Ling Pan*, “Magnetically Tunable Room-Temperature 2p Liquid Crystal Terahertz Phase Shifter,” Opt. Exp. 12(2004)2625 (The first room-temperature tunable 2p THz phase shifter). See also Chao-Yuan Chen, Tsong-Ru Tsai, Ci-Ling Pan, and Ru-Pin Pan, “Room  Temperature Terahertz Phase Shifter Based on Magnetically Controlled Birefringence in Liquid Crystals,” Appl. Phys. Lett. 83(2003)4497. Multiple Taiwan and US patents
  6. Tze-An Liu, Masahiko Tani, and Makoto Nakajima, Ci-Ling Pan*, “Ultrabroadband terahertz field detection by photoconductive antennas based on multi-energy arsenic-ion-implanted GaAs and semi-insulating GaAs,” Appl. Phys. Lett. 83(2003) 1322-1324. (broadest reported to date for antennas fabricated on ion-implanted materials) see also, Tze-An Liu, et al. “Ultrabroadband terahertz field detection by photoconductive antennas based on proton-bombarded InP,” Opt. Exp. 12(2004).
  7. Yi-Chao Wang, Jia-Min Shieh, Hsiao-Wen Zan and Ci-Ling Pan* “Near-infrared femtosecond laser crystallized poly-Si thin film transistors,” Opt. Exp. 15(2007) 6981 (Demonstrated potential application of ultrafast athermal annealing for TFT applications); see also, Jia-Min Shieh, Zun-Hao Chen, Bau-Tong Dai, Yi-Chao Wang, Alexei Zaitsev, and Ci-Ling Pan*, “Near-Infrared Femtosecond Laser-induced Crystallization of Amorphous Silicon,” Appl. Phys. Lett., 85(2004)1232, Taiwan patent I245321.
  8. W. –J. Chen*, H. –Z. Wang, R. –Y. Lin, C. –K. Lee, and C. –L. Pan,* “Attosecond pulse synthesis and arbitrary waveform generation with cascaded harmonics of an injection-seeded high-power Q-switched Nd:YAG laser,” Laser Phys. Lett. 9(2012) 212. (reported by SPIE Newsroom and Bulletin of AAPPS). See also, C. –L. Pan et al., “Multi-Color Harmonic Synthesized Laser System For Laser Processing And Laser Processing Method Using Multi-Color Harmonic Synthesized Laser,” U. S. patent 9,031,101 and Taiwan patent I490068; Chan-Shan Yang, Chih-Hsuan Lin, Alexey Zaytsev, Kuei-Chung Teng, Tsing-Hua Her, Ci-Ling Pan*, “Femtosecond laser ablation of polymethylmethacrylate via dual-color synthesized waveform,” Appl. Phys. Lett., 106(2015)051902 (first report of phase dependence of laser processing).
  9. Ci-Ling Pan and Jin-Wei Shi, “Ultrawide-Band Sub-THz Photonic Wireless Links,” Chapter 3, in Microwave Photonics, ed., C. H. Lee, 2nd ed., CRC Press, Taylor & Francis, 2013. See also, J.-W. Shi, C.-B. Huang, and Ci-Ling Pan*, “Millimeter-wave Photonic Wireless Links for Very-High Data Rate Communication,” invited review article, NPG Asia Materials, 3(2011)41. (Progress towards radio-over-fiber wireless data transmission up to 20 Gbit/s at 0.1 THz).
  10. Alexey Zaytsev*, Chih-Hsuan Lin, Yi-Jing You, Chia-Chun Chung, Chi-Luen Wang, and Ci-Ling Pan*, “Supercontinuum generation by noise-like pulses transmitted through normally dispersive standard single-mode fibers,” Optics Express 21(2013)16056. (Novel fiber-laser-based approach to supercontinuum generation) US & Taiwan patent I474060. See also, A. K. Zaytsev*, C. H. Lin, Y. J. You, F. H. Tsai, C. L. Wang and C. L. Pan*, “Controllable noise-like operation regime in Yb:doped dispersion-mapped fiber ring laser,” Laser Phys. Lett. 10(2013)045104, Taiwan patent I509923, U.S. Patent 8,897,325
All Publications 


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