Nonlinear optics and optoelectronics Lab - Cubic nonlinear effects: self-focusing and modulation instability in glasses

Spatial solitons and parametric effects in ferroelectrics

Theoretical and experimental investigation of parametric (three-waves) effects in ferroelectric quadratic crystals, including cascading, spatial optical solitons, second-harmonic generation, 1D and 2D photonic crystals/lattices of nonlinear origin via quasi-phase-matched interaction in proton exchanged, reverse proton exchanged, poled, surface poled Lithium Niobate and Lithium Tantalate samples. Current goals include backward second harmonic generation, UV wavelength and Terahertz generation.

Collaborations

Department of Electrical, Electronic and Telecommunication Engineering, University of Palermo, Palermo, Italy

CRES - Centro per la Ricerca Elettronica in Sicilia, Monreale, Palermo, Italy

Optoelectronics Research Centre, University of Southampton, Southampton, UK

People

Gaetano Assanto, Lorenzo Colace, Usman Sapaev, Elena D\'Asaro

Related publications

2018

Thermo-optic soliton routing in nematic liquid crystals: Optics Letters Vol. 43, Issue 10, pp. 2296-229

2017

Nonlinear continuous-wave optical propagation in nematic liquid crystals: Interplay between reorientational and thermal effects: Phys. Rev. E 96, 012703

2016

Highly nonlocal optical response: Benefit or drawback?: Journal of Nonlinear Optical Physics & MaterialsVol. 25, No. 04, 1650043

2015

Diffraction-induced instability of coupled dark solitary waves: Opt. Lett., Vol. 40, Issue 8, pp. 1771-1774 (2015)

2011

Reorientational versus Kerr dark and grey solitons using modulation theory: Phys. Rev. E 84, 066602 (2011)
Features of randomized electric-field assisted domain inversion in Lithium Tantalate: Opt. Express 19 (25), 25780-5 (2011)
Efficient pulse compression and frequency conversion of phase-modulated laser pulses in engineered quasi-phase-matched gratings: Phys. Wave Phenom. 19 (2), 107-11 (2011)

2010

Soft proton exchanged channel waveguides in congruent lithium tantalate for frequency doubling: Opt. Express 25, 25967-72 (2010)
Parametric self-trapping in the presence of random quasi-phase-matching: Opt. Lett. 35 (22), 3760 (2010)
Continuous-Wave Backward Frequency Doubling in Periodically Poled Lithium Niobate: Appl. Phys. Lett. 96, 111110 (2010)
Nonlinear disorder mapping through three wave mixing: IEEE Photon. J. 2 (1), 18-28 (2010)
Nonlinear disorder mapping through three-wave mixing: IEEE Photonics Journal 2, 18-28 (2010)
Random quasi-phase-matched second-harmonic eneration in periodicaly poled lithium tantalate: Opt. Lett. 35, 363-365 (2010)

2009

Quadratic Solitons in Non Collinear Quasi-Phase Matched Geometry: Phys. Rev. A 80, 021801 (2009)

2008

Ultra-Violet Generation in Periodically Poled Lithium Tantalate Waveguides: Appl. Phys. Lett. 93, 121117 (2008)
In-situ tuning of a photonic band-gap with laser pulses: Appl. Phys. Lett. 93, 091111 (2008)
Spatial solitons in two-dimensional lattices of a nonlinear nature: Opt. Photon. News 6, 29-32 (2008)
Transverse nonlinear optics in Heavy Metal Oxide Glass: Phys. Rev. A 77, 043808 (2008)
Parametric solitons in two-dimensional lattices of purely nonlinear origin: Phys. Rev. Lett. 100, 053901 (2008)
Pulse shaping via Backward Second Harmonic Generation: Opt. Express 16, 2115-2121 (2008)
Efficient high-harmonic generation in engineered quasi-phase matching gratings: Opt. Express 16, 18370-18375 (2008)

2007

Spatial solitons in Chi2 planar photonic crystals: Opt. Lett. 32, 3149-3151 (2007)
Compensating group-velocity mismatch in parametric frequency generation: Opt. Lett. 32, 2921-2923 (2007)
Guided-wave frequency doubling in surface periodically poled lithium niobate: competing effects: J. Opt. Soc. Am. B 24, 1564-1570 (2007)
Femtosecond pulse synthesis by efficient second-harmonic generation in engineered quasi phase matching gratings: Opt. Express 15, 7448-7457 (2007)
Ultraviolet Quasi-Phase-Matched Second Harmonic Generation in Surface Periodically Poled Lithium Niobate Optical Waveguides: Laser Phys. 17, 884-888 (2007)

2006

Lithium niobate step-index waveguides for broadband second harmonic generation: J. Nonl. Opt. Phys. 15, 191-202 (2006)
Impedance matching in photonic crystal microcavities for second-harmonic generation: Opt. Lett. 31, 250-252 (2006)
Surface periodic poling in congruent lithium tantalate: Electron. Lett. 42, 546-547 (2006)

2005

Transient-mode excitation, terahertz generation and wavelength shifting in a photonic band gap: Appl. Phys. B 81, 415-420 (2005)
Terahertz pulse generation via optical rectification in photonic crystal microcavities: Opt. Lett. 30, 1174-1176 (2005)
Silica masks for improved surface poling of lithium niobate: Electron. Lett. 41, 92-94 (2005)

2004

Nonlinear Optics Applications: Bright Spatial Solitons: Encyclopedia of Modern Optics, Vol. 5, 43-55 (2004)
Nonlinear Optics Basics: Cascading: Encyclopedia of Modern Optics, vol. 3, 207-212 (2004)
Low-threshold spatial solitons in reverse-proton-exchanged periodically poled lithium niobate waveguides: Opt. Lett. 29, 1778 (2004)
Bi-colour spatial solitons in linearly uncoupled planar waveguides: J. Opt. B: Quantum Semiclass. Opt. 6, S217-S222 (2004)
Optical parametric oscillations in isotropic photonic crystals: Opt. Express 12, 823-828 (2004)

2003

Spatial optical simultons in nonlinearly coupled planar waveguides: Opt. Lett. 28, 1031-1033 (2003)
Second Harmonic Generation in coupled LiNbO3 waveguides by reverse proton exchange: IEEE Photon. Techn. Lett. 15, 443-445 (2003)
Novel Spatial Solitons in coupled Lithium Niobate Waveguides by Reverse Proton Exchange: IEEE Photon. Techn. Lett. 15, 537-539 (2003)

2002

Simple physics of quadratic spatial solitons: Opt. Express 10, 388-396 (2002)

2001

Second Harmonic Generation in Reverse Proton Exchanged Lithium Niobate Waveguides: Opt. Express 8, 232-237(2001)
All-optical diode in a periodically-poled Lithium Niobate waveguide: Appl. Phys. Lett. 79, 314-316 (2001)
Efficient Frequency Doubling in Reverse Proton Exchanged Lithium Niobate Waveguides: IEEE Photon. Techn. Lett. 13, 323-325 (2001)
Quadratic Simultons in linear and nonlinear photonic bandgaps: J. Nonl. Opt. Phys. Mat. 10, 197-208 (2001)

2000

Energy localization in photonic crystals of a purely nonlinear origin: Phys. Rev. Lett. 85, 2502-2505 (2000)
Parametric gap solitons and chaos via second-harmonic generation in Bragg gratings: Chaos 10, 590-599 (2000)
Optically Controlled Delay Lines by Pulse Self-Trapping in Parametric Waveguides with Distributed Feedback: IEEE J. Quantum Electron. 36, 931-943(2000)
Cascading phase-shift and multivalued response in counterpropagating frequency nondegenerate parametric amplifiers: Opt. Lett. 25, 966-968 (2000)

1999

Energy localization through Bragg gratings in quadratic media for second-harmonic generation: Acta Phys. Pol. 95, 719-726 (1999)
Analysis of Lithium Niobate All-Optical Wavelength Shifters for the Third Spectral Window: J. Opt. Soc. Am. B 16, 741-753 (1999)
All-optical diode based on second-harmonic generation in an asymmetric waveguide: J. Opt. Soc. Am. B 16, 267-269 (1999)
Self-sustained trapping mechanism of zero-velocity parametric gap solitons: Phys. Rev. E 59, 2467-2469 (1999)
Cavityless oscillation through backward quasi-phase-matched second harmonic generation: Opt. Lett. 24, 1139-1141 (1999)
Unique properties of quadratic solitons: Acta Phys. Pol. A 95, 691-704 (1999)

1998

Parametric gap solitons in quadratic media: Opt. Express 3, 389-404 (1998)
Thin film devices for all-optical switching and processing via quadratic nonlinearities: Thin Solid Films 331, 291-297 (1998)
Multiple branching of vectorial spatial solitary waves in quadratic media: Opt. Commun. 146, 356-362 (1998)
Trapping of slowly-moving or stationary two-color gap solitons: Opt. Lett. 23, 334-336 (1998)
Phase-insensitive All-optical Transistors based on Second-order Nonlinearities: IEEE J. Quantum Electron. 34, 666-672 (1998)
Read/Write All-Optical Buffer by self-trapped Gap Simultons: Electron. Lett. 34, 689-691 (1998)
Excitation of stable transverse wavepackets with quadratic and cubic susceptibilities: Opt. Commun. 150, 390-398 (1998)
Interactions of type II vectorial spatial solitary waves in materials with quadratic nonlinearity: Opt. Quantum Electron. 30, 923-935 (1998)
All-optical Mode Mixer Spatial Switch Based on Cascading in Lithium Niobate: Appl. Phys. Lett. 72, 3405-3407 (1998)
Prism coupling into second-order nonlinear waveguides: Opt. Commun. 146, 95-98 (1998)
Optical gap solitons via second-harmonic generation: exact solitary solutions: Phys. Rev. E 57, R1251-R1254 (1998)
Three-wave simultons: quasi-particles in quadratic media: J. Nonl. Opt. Phys. & Mat. 7, 345-368 (1998)
Robust generation, properties, and potential applications of quadratic spatial solitons generated by optical parametric amplification: Opt. Quantum Electron. 30, 907-921 (1998)

1997

Mode Interplay via Quadratic Cascading in a Lithium Niobate Waveguide for All-Optical Processing: Opt. Quantum Electron. 29, 53-63 (1997)
Collisional interactions of vectorial spatial solitary waves in type II frequency doubling media?,: J. Opt. Soc. Am. B 14, 3151-3161 (1997)
Bidimensional spatial solitary waves in quadratically nonlinear bulk media: J. Opt. Soc. Am. B 14, 3134-3142 (1997)
Phase- and Polarization-Insensitive All-Optical Switching by Self-Guiding in Quadratic Media: Opt. Lett. 22, 1391-1393 (1997)
Beam pointing control with spatial solitary waves in quadratic nonlinear media: Opt. Commun. 134, 223-226 (1997)
Intensity controlled interactions between vectorial spatial solitary waves in quadratic nonlinear media: Opt. Lett. 22, 7-9 (1997)
Doubly resonant Bragg simultons via second-harmonic generation: Phys. Rev. Lett. 78, 2341-2344 (1997)
Bloch Function Approach for parametric gap solitons: Opt. Lett. 22, 445-447 (1997)
Efficient Wavelength Shifting Over the Erbium Amplifier Bandwidth Via Cascaded Second Order Processes in Lithium Niobate Waveguides: Appl. Phys. Lett. 7, 1020-1022 (1997)
Excitation of self-transparency Bragg solitons in quadratic media: Opt. Lett. 22, 1350-1352 (1997)
Quadratic Spatial Soliton Generation By Seeded Down Conversion of a Strong Harmonic Pump Beam: Opt. Lett. 22, 1683-1685 (1997)
Polarization multiplexed χ⁽²⁾ solitary waves interactions: Opt. Lett. 22 , 1376-1378 (1997)

1996

All-optical switching via quadratic nonlinearities in a Mach-Zehnder Device with Soliton-like pulses: Nonl. Opt. 16, 303-320 (1996)
Soliton Polarization rotation and switching in type II second-harmonic generation: Opt. Lett. 21, 1969-1971 (1996)
A versatile bistable gate via quadratic cascading in a Bragg periodic structure: J. Opt. Soc. Am. B 13, 661-670 (1996)
All-optical switching by spatial walk-off compensation and solitary-wave locking: Appl. Phys. Lett. 68, 1449-1451(1996)
Phase-insensitive, Single wavelength, All-Optical transistor Based on second-Order nonlinearities: Electron. Lett. 32, 1135-1136 (1996)

1995

All-optical Modulation via Nonlinear Cascading in Type II Second Harmonic Generation: Appl. Phys. Lett. 67, 2120-2122 (1995)
Cascading effects in Type II second-harmonic generation: applications to all-optical processing: Opt. Commun. 119, 143-148 (1995)
Guided-wave optical bistability through nonlinear cascading in a phase-matched distributed reflector: Electron. Lett. 31, 1661-1662 (1995)
Second Harmonic Generation: towards an all-optical transistor: Opt. Phot. News 13, Dec.1995
Coherent interactions for all-optical signal processing via quadratic nonlinearities: IEEE J. Quantum Electron. 31, 673-681 (1995)
Transistor action through nonlinear cascading in Type II interactions: Opt. Lett. 20, 1595-1597 (1995)

1994

All-optical processing by means of Vectorial Interactions in Second-Order Cascading: Novel approaches: Opt. Lett. 19, 1720-1722 (1994)
All-Optical Switching via Second Harmonic Generation in a Nonlinearly Asymmetric Directional Coupler: Opt. Commun. 110, 599-603 (1994)
Phase Controlled Transistor Action by Cascading of Second-Order Nonlinearities: Opt. Lett. 19, 1305-1307 (1994)
Polarization spatial chaos in second harmonic generation: Opt. Lett. 19, 1825-1827 (1994)
All-optical phase controlled amplitude modulator: Electron. Lett. 30, 733-735 (1994)

1993

Large nonlinear phase shifts in second-order nonlinear optical processes: Opt. Lett. 18, 13-15 (1993).
All Optical Switching Devices Based on Large Nonlinear Phase Shifts from Second Harmonic Generation: Appl. Phys. Lett. 62, 1323-1325 (1993)

1992

Nonlinear Phase Shifts Using Second Order Nonlinearities: Opt. Phot. News 3, 11 (1992)

1989

Observation of Laser-Induced Parallel Ridges in Y-cut Lithium Niobate Crystals: J. Mat. Sci. Lett. 8, 971-973 (1989)
Ti-Indiffused LiNbO₃ Optical Waveguides: A Range of Different Technologies: Mat. Chem. Phys. 23, 408-415 (1989)