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Luca Razzari

Photonics, nanoplasmonics

nonlinear optics, terahertz spectroscopy

Research interests

Professor Razzari is interested in investigating the fundamental aspects of radiation-matter interactions on unusual temporal and spatial scales, in view of creating novel tools for photonic applications.


To this end, he exploits the ultrafast (down to few femtoseconds) and ultra-broadband (from ultraviolet to terahertz) nature of nanoplasmonics, which studies the interaction of electromagnetic fields with metallic nanostructures. Nanoplasmonics is able to bring light down to the nanoscale, strongly enhancing the local electric field, and thus carries great promises for an effective miniaturization of photonic technologies and for the on-chip integration of linear and nonlinear optical functions with state-of-the-art electronic circuits.


Professor Razzari also employs ultrafast terahertz pulses (1 THz corresponds to 1 picosecond in time and 300 microns in wavelength) for spectroscopic applications. These studies aim at exploring the intriguing physics at the border between the quasi-static (classical) approximation for the terahertz field and its quantum counterpart, which considers the terahertz wave being composed of photons.

Terahertz radiation oscillates at frequencies that ideally bridge the gap between the operating regimes of electronics and the realm of photonics. 


Open positions

Positions with financial support are currently available at the PhD/Postdoctoral level on the development of novel nanoplasmonic concepts and devices for photonics. We are looking for highly motivated, creative students with a university degree in a relevant discipline (physics, physical engineering, electrical engineering or equivalent). They should have willingness to work in a team and undertake independent learning. Previous experience in numerical modeling of electromagnetic processes and/or in advanced optical setup development will be an asset.


If interested, please send your CV by e-mail to razzari@emt.inrs.ca.



A.      Journal articles

[A.61] X. Jin, A. Cerea, G.C. Messina, A. Rovere, R. Piccoli, F. De Donato, F. Palazon, A. Perucchi, P. Di Pietro, R. Morandotti, S. Lupi, F. De Angelis, M. Prato, A. Toma, L. Razzari, Reshaping the Phonon Energy Landscape of Nanocrystals Inside a Terahertz Plasmonic Nanocavity. Nature Commun. 9, 763 (2018).


[A.60] A. Rovere, Y.-G. Jeong, R. Piccoli, S.-H. Lee, S.-C. Lee, O-P. Kwon, M. Jazbinsek, R. Morandotti, L. Razzari, Generation of High-Field Terahertz Pulses in an HMQ-TMS Organic Crystal Pumped by an Ytterbium Laser at 1030 nm. Opt. Express 26, 2509 (2018).


[A.59] A. Pasquazi, M. Peccianti, L. Razzari, D.J. Moss, S. Coen, M. Erkintalo, Y.K. Chembo, T. Hansson, S. Wabnitz, P. Del’Haye, X. Xue, A.M. Weiner, R. Morandotti, Micro-Combs: A Novel Generation of Optical Sources. Invited paper, Phys. Rep. 729, 1 (2018).


[A.58] J. Zhang, X. Jin, X. Yu, Y. Sang, L. Razzari, H. Liu, J. Claverie, An In Situ Polymerization-Encapsulation Approach to Prepare TiO2–Graphite Carbon–Au Photocatalysts for Efficient Photocatalysis. Part. Part. Syst. Charact. 35, 1700297 (2018).


[A.57] A. Tomasino, A. Mazhorova, M. Clerici, M. Peccianti, S.-P. Ho, Y. Jestin, A. Pasquazi, A. Markov, X. Jin, R. Piccoli, S. Delprat, M. Chaker, A. Busacca, J. Ali, L. Razzari, R. Morandotti, Solid-State-Biased Coherent Detection of Ultra-Broadband Terahertz Pulses. Optica 4, 1358 (2017). 


[A.56]  R. Naccache, A. Mazhorova, M. Clerici, R. Piccoli, L.K. Khorashad, A.O. Govorov, L. Razzari, F. Vetrone, R. Morandotti, Terahertz Thermometry: Combining Hyperspectral Imaging and Temperature Mapping at Terahertz Frequencies. Laser Photonics Rev. 11, 1600342 (2017).


A.55] J. Zhang, X. Jin, P.I. Morales-Guzman, X. Yu, H. Liu, H. Zhang, L. Razzari, J.P. Claverie, Engineering the Absorption and Field Enhancement Properties of Au–TiO2 Nanohybrids via Whispering Gallery Mode Resonances for Photocatalytic Water Splitting. ACS Nano 10, 4496 (2016).


[A.54] L. Caspani, C. Reimer, M. Kues, P. Roztocki, M. Clerici, B. Wetzel, Y. Jestin, M. Ferrera, M. Peccianti, A. Pasquazi, L. Razzari, B.E. Little, S.T. Chu, D.J. Moss, R. Morandotti, Multifrequency sources of quantum correlated photon pairs on-chip: a path toward integrated Quantum Frequency Combs. Invited review, Nanophotonics 5, 351 (2016).


[A.53] L. Razzari, M. Reid, Recent Developments in Terahertz Spectroscopy and Applications. Invited review, Phys. Can. 71, 236 (2015).


[A.52] S. Rohani, M. Quintanilla, S. Tuccio, F. De Angelis, E. Cantelar, A. O. Govorov, L. Razzari, F. Vetrone, Enhanced Luminescence, Collective Heating, and Nanothermometry in an Ensemble System Composed of Lanthanide-Doped Upconverting Nanoparticles and Gold Nanorods. Adv. Opt. Mater. 3, 1606 (2015).


[A.51] S. Panaro, A. Nazir, R. Proietti Zaccaria, L. Razzari, C. Liberale, F. De Angelis, A. Toma, Plasmonic Moon: a Fano-like approach for squeezing the magnetic field in the infrared. Nano Lett. 15, 6128 (2015).


[A.50] M. Clerici, Y. Hu, P. Lassonde, C. Milián, A. Couairon, D. N. Christodoulides, Z. Chen, L. Razzari, F. Vidal, F. Légaré, D. Faccio, R. Morandotti, Laser-assisted guiding of electric discharges around objects. Sci. Adv. 1, e1400111 (2015).


[A.49] A. Toma, S. Tuccio, M. Prato, F. De Donato, A. Perucchi, P. Di Pietro, S. Marras, C. Liberale, R. Proietti Zaccaria, F. De Angelis, L. Manna, S. Lupi, E. Di Fabrizio, L. Razzari, Squeezing Terahertz Light into Nanovolumes: Nanoantenna Enhanced Terahertz Spectroscopy (NETS) of Semiconductor Quantum Dots. Nano Lett. 15, 386 (2015).


[A.48] M.K. Mridha, A. Mazhorova, M. Clerici, I. Al-Naib, M. Daneau, X. Ropagnol, M. Peccianti, C. Reimer, M. Ferrera, L. Razzari, F. Vidal, R. Morandotti,Active terahertz two-wire waveguides.Opt. Express 22, 22340 (2014).


[A.47] C. Reimer, L. Caspani, M. Clerici, M. Ferrera, M. Kues, M. Peccianti, A. Pasquazi, L. Razzari, B.E. Little, S.T. Chu, D.J. Moss, R. Morandotti, Integrated frequency comb source of heralded single photons. Opt. Express 22, 6535 (2014).



[A.46]  S. Tuccio, L. Razzari, A. Alabastri, A. Toma, C. Liberale, F. De Angelis, P. Candeloro, G. Das, A. Giugni, E. Di Fabrizio, R. Proietti Zaccaria, Direct determination of the resonance properties of metallic conical nanoantennas. Opt. Lett. 39, 571 (2014).


[A.45] A. Pasquazi, L. Caspani, M. Peccianti, M. Clerici, M. Ferrera, L. Razzari, D. Duchesne, B.E. Little, S.T. Chu, D.J. Moss, R Morandotti, Self-locked optical parametric oscillation in a CMOS compatible microring resonator: a route to robust optical frequency comb generation on a chip. Opt. Express 21, 13333 (2013).



[A.44] M. Clerici, D. Faccio, L. Caspani, M. Peccianti, E. Rubino, L. Razzari, F. Légaré, T. Ozaki, R. Morandotti, CCD-based imaging and 3D space–time mapping of terahertz fields via Kerr frequency conversion. Opt. Lett. 38, 1899 (2013).


[A.43] S. Panaro, A. Toma, R. Proietti Zaccaria, M. Chirumamilla, A. Saeed, L. Razzari, G. Das, C. Liberale, F. De Angelis, E. Di Fabrizio, Design and top-down fabrication of metallic L-shape gap nanoantennas supporting plasmon-polariton modes. Microelectron. Eng. 111, 91 (2013).


[A.42] L. Razzari, A. Toma, M. Clerici, M. Shalaby, G. Das, C. Liberale, M. Chirumamilla, R. Proietti Zaccaria, F. De Angelis, M. Peccianti, R. Morandotti, E. Di Fabrizio, Terahertz Dipole Nanoantenna Arrays: Resonance Characteristics. Plasmonics 8, 133 (2013).


[A.41] L. Razzari, R. Morandotti, Gain and loss mixed in the same cauldron. Nature 488, 163 (2012) - "News and Views" article.


[A.40] A. Gopalakrishnan, M. Malerba, S. Tuccio, S. Panaro, E. Miele, M. Chirumamilla, S. Santoriello, C. Dorigoni, A. Giugni, R. Proietti Zaccaria, C. Liberale, F. De Angelis, L. Razzari, A. Toma, G. Das, E. Di Fabrizio, Nanoplasmonic structures for biophotonic applications: SERS overview. Annalen der Physik 524, 620 (2012).


[A.39] I. Rattalino, V. Cauda, P. Motto, T. Limongi, G. Das, L. Razzari, F. Parenti, E. Di Fabrizio, A. Mucci, L. Schenetti, G. Piccinini, D. Demarchi, A nanogap–array platform for testing the optically modulated conduction of gold–octithiophene–gold junction for molecular optoelectronics. RSC Advances 2, 10985 (2012).


[A.38] A. Toma, G. Das, M. Chirumamilla, A. Saeed, R. Proietti Zaccaria, L. Razzari, M. Leoncini, C. Liberale, F. De Angelis, E. Di Fabrizio, Fabrication and characterization of a nanoantenna-based Raman device for ultrasensitive spectroscopic applications. Microelectron. Eng. 98, 424 (2012).


[A.37] R. Proietti Zaccaria, A. Alabastri, F. De Angelis, G. Das, C. Liberale, A. Toma, A. Giugni, L. Razzari, M. Malerba, H. B. Sun, E. Di Fabrizio, Fully analytical description of adiabatic compression in dissipative polaritonic structures. Phys. Rev. B 86, 035410 (2012).


[A.36] M. Shalaby, M. Peccianti, Y. Ozturk, M. Clerici, I. Al-Naib, L. Razzari, T. Ozaki, A. Mazhorova, M. Skorobogatiy, R. Morandotti, Terahertz Faraday rotation in a magnetic liquid: high magneto-optical figure of merit and broadband operation in a ferrofluid. Appl. Phys. Lett. 100, 241107 (2012).


[A.35] R. Proietti Zaccaria, F. De Angelis, A. Toma, L. Razzari, A. Alabastri, G. Das, C. Liberale, E. Di Fabrizio, Surface plasmon polariton compression through radially and linearly polarized source. Opt. Lett. 37, 545 (2012).


[A.34] L. Razzari, A. Toma, M. Shalaby, M. Clerici, R. Proietti Zaccaria, C. Liberale, S. Marras, I.A.I. Al-Naib, G. Das, F. De Angelis, M. Peccianti, A. Falqui, T. Ozaki, R. Morandotti, E. Di Fabrizio, Extremely large extinction efficiency and field enhancement in terahertz resonant dipole nanoantennas. Opt. Express 19, 26088 (2011).


[A.33] L. Caspani, D. Duchesne, K. Dolgaleva, S.J. Wagner, M. Ferrera, L. Razzari, A. Pasquazi, M. Peccianti, D.J. Moss, J.S. Aitchison, R. Morandotti, Optical frequency conversion in integrated devices. Invited paper - 50th anniversary of Nonlinear Optics, J. Opt. Soc. Am. B 28, A67 (2011).


[A.32] M. Ferrera, Y. Park, L. Razzari, B.E. Little, S.T. Chu, R. Morandotti, D.J. Moss, J. Azaña, All-optical 1st and 2nd order integration on a chip. Opt. Express 19, 23153 (2011).


[A.31] F. Blanchard, D. Golde, F. H. Su, L. Razzari, G. Sharma, R. Morandotti, T. Ozaki, M. Reid, M. Kira, S.W. Koch, F.A. Hegmann, Effective mass anisotropy of hot electrons in nonparabolic conduction bands of n-doped InGaAs films using ultrafast terahertz pump-probe techniques. Phys. Rev. Lett. 107, 107401 (2011).


[A.30] M. Shalaby, H. Merbold, M. Peccianti, L. Razzari, G. Sharma, T. Ozaki, R. Morandotti, T. Feurer, L. Heyderman, A. Weber, H. Sigg, B. Patterson, Concurrent field enhancement and high transmission of THz radiation in nanoslit arrays. Appl. Phys. Lett. 99, 041110 (2011).


[A.29] F. Blanchard, G. Sharma, L. Razzari, X. Ropagnol, H.-C. Bandulet, F. Vidal, R. Morandotti, J.-C. Kieffer, T. Ozaki, H. Teidje, H. Haugen, M. Reid, F. Hegmann,  Generation of Intense Terahertz Radiation via Optical Methods. Invited paper, IEEE J. Sel. Top. Quant. 17, 5 (2011).


[A.28] J.-Y. Hwang, M. Ferrera, L. Razzari, A. Pignolet, R. Morandotti, The role of Bi3+ ions in magneto-optic Ce and Bi comodified epitaxial iron garnet films. Appl. Phys. Lett. 97, 161901 (2010).


[A.27] M. Ferrera, Y. Park, L. Razzari, B.E. Little, S.T. Chu, R. Morandotti, D.J. Moss, J. Azaña, On-chip CMOS compatible all-optical integrator. Nature Commun. 1:29, doi:10.1038/ncomms1028 (2010).


[A.26] G. Sharma, L. Razzari, F. Blanchard, F. H. Su, A. Ayesheshim, T. L. Cocker, L. V. Titova, H.-C. Bandulet, R. Morandotti, J.-C. Kieffer, T. Ozaki, M. Reid, F.A. Hegmann, Time-Resolved Terahertz Spectroscopy of Free Carrier Nonlinear Dynamics in Semiconductors. Invited paper, IEEE Photon. J. 4, 578 (2010).


[A.25] M. Peccianti, M. Ferrera, L. Razzari, R. Morandotti, B.E. Little, S.T. Chu, D.J. Moss, Subpicosecond Optical Pulse Compression via an Integrated Nonlinear Chirper. Opt. Express 18, 7625 (2010).


[A.24] D. Duchesne, M. Peccianti, M.R.E. Lamont, M. Ferrera, L. Razzari, F. Légaré, R. Morandotti, S. Chu, B.E. Little, D.J. Moss, Supercontinuum generation in a high index doped silica glass spiral waveguide. Opt. Express 18, 923 (2010).


[A.23] L. Razzari, D. Duchesne, M. Ferrera, R. Morandotti S.-T. Chu, B.E. Little, D.J. Moss, CMOS compatible integrated optical hyper-parametric oscillator. Nature Photon. 4, 41 (2010).


[A.22] P.F. Ndione, M. Ferrera, D. Duchesne, L. Razzari, M. Gaidi, M. Chaker, R. Morandotti, Hybrid integration of CaxBa1-xNb2O6 thin film electro-optic waveguides with silica/silicon substrates. Opt. Express 17, 15128 (2009).


[A.21] M. Ferrera, D. Duchesne, L. Razzari, M. Peccianti, R. Morandotti, P. Cheben, S. Janz, D.-X. Xu, B.E. Little, S. Chu, D.J. Moss, Low power four wave mixing in an integrated, micro-ring resonator with Q = 1.2 million. Opt. Express 17, 14098 (2009).


[A.20] F.H. Su, F. Blanchard, G. Sharma, L. Razzari, A. Ayesheshim, T.L. Cocker, L. V. Titova, T. Ozaki, J.-C. Kieffer, R. Morandotti, M. Reid, F.A. Hegmann, Terahertz pulse induced intervalley scattering in photoexcited GaAs. Opt. Express 17, 9620 (2009).


[A.19] L. Razzari, F.H. Su, G. Sharma, F. Blanchard, A. Ayesheshim, H.-C. Bandulet, R. Morandotti, J.-C. Kieffer, T. Ozaki, M. Reid, F.A. Hegmann, Nonlinear ultrafast modulation of the optical absorption of intense, few-cycle terahertz pulses in n-doped semiconductors. Phys. Rev. B 79, 193204 (2009).


[A.18] M. Chandra Sekhar, J.-Y. Hwang, M. Ferrera, Y. Linzon, L. Razzari, C. Harnagea, M. Zaezjev, A. Pignolet, R. Morandotti, Strong Enhancement of the Faraday Rotation in Ce and Bi Co-modified Epitaxial Iron Garnet Thin Films. Appl. Phys. Lett. 94, 181916 (2009).


[A.17] F. Blanchard, G. Sharma, X. Ropagnol, L. Razzari, R. Morandotti, T. Ozaki, Improved terahertz two-color plasma sources pumped by a high intensity laser beam. Opt. Express 17, 6044 (2009). 


[A.16] D. Duchesne, L. Razzari, L. Halloran, R. Morandotti, A.J. Springthorpe, D.N. Christodoulides, D.J. Moss, Two-photon photodetector in a multiquantum well GaAs laser structure at 1.55μm. Opt. Express 17, 5298 (2009).


[A.15] D. Duchesne, M. Ferrera, L. Razzari, R. Morandotti, B.E. Little, S.T. Chu, D.J. Moss, Efficient self-phase modulation in low loss, high index doped silica glass integrated waveguides. Opt. Express 17, 1865 (2009).


[A.14] Y. Linzon, M. Ferrera, L. Razzari, A. Pignolet, R. Morandotti,Polarization proximity effect in isolator crystal pairs. Opt. Lett. 33,2871 (2008).


[A.13] M. Ferrera, L. Razzari, D. Duchesne, R. Morandotti, Z. Yang, M. Liscidini, J.E. Sipe, S. Chu, B.E. Little, D.J. Moss, Low-power continuous-wave nonlinear optics in doped silica glass integrated waveguide structures. Nature Photon. 2,737 (2008).


[A.12] M. Righini, A. Gnoli, L. Razzari, U. Serincan, R. Turan, Evaluation of the radiative recombination mechanism in Si nanocrystals embedded in silica matrix. J. Nanosci. Nanotechnol. 8, 823 (2008).


[A.11] R. Helsten, L. Razzari, M. Ferrera, P. F. Ndione, M. Gaidi, C. Durand, M. Chaker, R. Morandotti, Pockels Response in Calcium Barium Niobate Thin Films. Appl. Phys. Lett. 91261101 (2007).


[A.10] F. Blanchard, L. Razzari, H.-C. Bandulet, G. Sharma, R. Morandotti, J.-C. Kieffer, T. Ozaki, M. Reid, H. F. Tiedje, H. K. Haugen, F. A. Hegmann, Generation of 1.5 μJ single-cycle terahertz pulses by optical rectification from a large aperture ZnTe crystal. Opt. Express 15,13212 (2007).


[A.9]   M. Astic, P. Barthelemy, D. Trager, L. Razzari, P. Delaye, R. Frey, R. Andre, G. Roosen, Four-wave mixture on the side of a band of 1D photonic crystal. J. Phys. IV 135, 93 (2006).


[A.8]   L. Razzari, A. Gnoli, M. Righini, A. Dana, A. Aydinli, Excited-state dynamics and nonlinear optical response of Ge nanocrystals embedded in silica matrix. Appl. Phys. Lett. 88, 181901 (2006).


[A.7]   P. Galinetto, F. Rossella, P. Minzioni, L. Razzari, I. Cristiani, V. Degiorgio, E.P. Kokanyan, MicroRaman and photorefractivity study of Hafnium-doped lithium-niobate crystals. J. Nonlinear Opt. Phys. 15, 9 (2006).


[A.6]   A. Gnoli, L. Razzari, M. Righini, Z-scan measurements with high repetition rate lasers: how to manage thermal effects. Opt. Express 13, 7976 (2005).


[A.5]   L. Razzari, D. Träger, M. Astic, P. Delaye, R. Frey, G. Roosen, R. André, Kerr and four-wave mixing spectroscopy at the band edge of one-dimensional photonic crystals. Appl. Phys. Lett. 86, 231106 (2005).


[A.4]   L. Razzari, P. Minzioni, I. Cristiani, V. Degiorgio, E.P. Kokanyan, Photorefractivity of hafnium-doped congruent lithium-niobate crystals. Appl. Phys. Lett. 86, 131914 (2005).


[A.3]   E.P. Kokanyan, L. Razzari, I. Cristiani, V. Degiorgio, J.B. Gruber. Reduced photorefraction in hafnium-doped single-domain and periodically-poled lithium niobate crystals. Appl. Phys. Lett. 84, 1880 (2004).


[A.2]   L. Razzari, C. Liberale, I. Cristiani, R. Tediosi, V. Degiorgio, Wavelength conversion and pulse reshaping through cascaded interactions in a MZI configuration. IEEE J. Quantum Electron. 39, 1486 (2003).


[A.1]   C. Liberale, I. Cristiani, L. Razzari, V. Degiorgio, Numerical study of cascaded wavelength conversion in quadratic media. J. Opt. A: Pure Appl. Opt. 4, 457 (2002).


B.     Book chapters

[B.7]   R. Piccoli, A. Rovere, A. Toma, R. Morandotti, L. Razzari, "Terahertz Nanoantennas for Enhanced Spectroscopy", in "Terahertz Spectroscopy - Cutting Edge Technology"IN‑TECH, Vienna, Austria ISBN 978-953-51-3032-1 (2017).


[B.6]    S. Rohani, M. Quintanilla, R. Naccache, R. Morandotti, L. Razzari, F. Vetrone, “Upconversion Enhancement in Lanthanide-Doped Nanoparticles Using Nanoplasmonics”, in “Encyclopedia of Nanotechnology”Springer, DOI: 10.1007/978-94-007-6178-0_100981-1 (2015).


[B.5]   F. Blanchard, L. Razzari, F.H. Su, G. Sharma, R. Morandotti, T. Ozaki, M. Reid, and F.A. Hegmann, “The dawn of nonlinear optics in the terahertz regime”, in “Nonlinear Photonics and Novel Optical Phenomena”, Springer Series in Optical Sciences, vol. 170, Dordrecht, The Netherlands ISBN 978-1-4614-3537-2 (2012).


[B.4]   M. Ferrera, D. Duchesne, L. Razzari, M. Peccianti, A. Pasquazi, Y.-W. Park, R. Morandotti, J. Azaña, B.E. Little, S.T. Chu5, and D.J. Moss, “Advanced Integrated Photonics in Doped Silica Glass”, in “Nonlinear Photonics and Novel Optical Phenomena”, Springer Series in Optical Sciences, vol. 170, Dordrecht, The Netherlands ISBN 978-1-4614-3537-2 (2012).


[B.3]   E. Di Fabrizio, F. Gentile, M. Perrone Donnorso, M. Chirumamilla Chowdary, E. Miele, M.L. Coluccio, R. La Rocca, R. Brescia, R. Krahne, G. Das, F. De Angelis, C. Liberale, A. Toma, L. Razzari, L. Manna, and R. Proietti Zaccaria, “Nanoparticles and Nanostructures for Biophotonic Applications”, in “The Delivery of Nanoparticles”, IN-TECH, Vienna, Austria ISBN 978‑953‑51-0615-9 (2012).


[B.2]   R. Proietti Zaccaria, A. Gopalakrishnan, G. Das, F. Gentile, A. Haddadpour, A. Toma, F. De Angelis, C. Liberale, F. Mecarini, L. Razzari, A. Giugni, R. Krahne, and E. Di Fabrizio,”Photonic Crystals for Plasmonics: From Fundamentals to Superhydrophobic Devices”, in “Photonic Crystals - Innovative Systems, Lasers and Waveguides”, IN-TECH, Vienna, Austria ISBN 978-953-51-0416-2 (2012).


[B.1]    D. Duchesne, M. Ferrera, L. Razzari, R. Morandotti, and D.J. Moss, “Nonlinear optics in ultra low loss high-index glass waveguide”, in “Advances in Lasers and Electro optics”, IN-TECH, Vienna, Austria ISBN 978-953-7619-82-4 (2010).