From terahertz devices to biomedical applications


主讲人:Roberto Morandotti 加拿大国立科学研究所教授、美国物理学会、美国光学学会会士





Prof Morandotti received a MSc in Physics from the University of Genova (Italy) in 1993 and a PhD in Electronic Engineering from the University of Glasgow (Scotland) in 1999, where his research activity focused on the study of the linear and nonlinear properties of optical discrete systems. In June 2003 he joined INRS-EMT (University of Quebec) in Montreal, where he is a Full Professor since 2008. His research interests mainly deal with the linear, nonlinear and quantum properties of periodic structures, both in III-V semiconductors and silica, as well as with optics at unusual wavelengths, including THz. Prof. Morandotti is author and coauthor of more than 700 papers in scientific journals and conferences (including ~20 in Nature, Science, Nature Photonics, Nature Physics, Nature Communication and Science Advances, as well as ~35 in Physical Review Letters) and gave over 100 invited keynote and plenary talks in various international conferences. He is currently serving/ has served as a subcommittee chair/technical committee member for several OSA, IEEE and SPIE meetings. Prof. Morandotti is a Canada Research Chair, an E.W.R. Steacie Memorial Fellow 2011 (awarded to the 6 best early career scientists in Canada), a Fellow of the Royal Society of Canada, a Fellow of the Optical Society of America, a Fellow of the American Physical Society, a Fellow of the Institute of Physics and a Fellow of the SPIE, among others.


The recent progress in nonlinear and ultrafast optics has opened new promising opportunities for terahertz (THz) science and technology, boosted by the development of reliable THz sources, detectors and imaging applications. We present a fully integrated technique, so called solid-state biased coherent detection (SSBCD), enabling the ultra-broadband coherent detection of THz radiation, i.e., electromagnetic waves featuring spectra as wide as 10 THz. This technique is based on solid-state materials and allows for the simultaneous reconstruction of amplitude and phase information of ultrashort THz pulses. SSBCD is a fully CMOS compatible platform technique allowing its cost-effective mass fabrication and making it attractive for a broad scientific and industrial audience. This paves the way to design compact and portable THz systems, operating at high repetition rates and modulation frequencies, thus resulting in a significant increase of the dynamic range and signal-to-noise ratio in comparison to currently commercially available THz systems. Moreover, we used the multidimensional information derived from broadband THz radiation for the development of a non-destructive and non‐invasive measurement technique that images concomitantly the hyperspectral distribution of a drug as well as the thermal distribution of plasmonically excited nanoparticles (NPs), both injected into a biological system (porcine skin). In addition, this concept was extended and used to characterize the photothermal properties of plasmonic NPs by determining their heating dynamics and efficiencies remotely by THz radiation.

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