Bistability, limiting, and self-pulsing in backward second-harmonic generation: a time-domain approach

Lauritano, Michele; Parini, Alberto; Bellanca, Gaetano; Trillo, Stefano; Conforti, Matteo; Locatelli, Andrea; Angelis, C. De

doi:10.1088/1464-4258/8/7/s29

Cited by 16 publications

(5 citation statements)

References 29 publications

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“…[7], where sub-picoseconds periods of the pulses have been predicted. Also, FDTD studies of backward second-harmonic generation in short-period quasi-phase-matched gratings with second order nonlinearity, demonstrated the existance of a SP regime with periods in the range of sub-picoseconds [38]. Self-modulation occuring in nonlinear plasmonic nanodimers is also in the range of hundreds of femtoseconds opening the possibility to generate tunable terahertz radiation [12].…”

Section: Discussionmentioning

confidence: 99%

Self-Pulsation in a Nonlinear Plasmonic Ring Resonator

Kusko

2013

IEEE J. Quantum Electron.

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We demonstrate the self-pulsing behavior in a nonlinear all-pass plasmonic microring resonator (MRR). The structure consists of a nonlinear metal-dielectric-metal (MDM) plasmonic waveguide and supports antisymmetric, backward propagating slow-modes. The slow modes are coupled to a feedback loop realized from a MDM waveguide, which supports symmetric, forward propagating fast modes. We calculate the temporal response of the system with a finite difference time domain method and show a SP behavior for input fields higher than a critical value. We perform a semi-quantitative description of the self-pulsation by solving iteratively, in time domain, the Ikeda equation of an all-pass MRR presenting a nonlinear phase shift. For this system, the pulses have a period of 300 fs with a modulation factor of 0.3. This configuration could be applied as a source of continuous wave terahertz radiation or as an optical clock in highly integrated plasmonic circuits.

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Section: Discussionmentioning

confidence: 99%

Self-Pulsation in a Nonlinear Plasmonic Ring Resonator

Kusko

2013

IEEE J. Quantum Electron.

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“…Theoretical methods developed in this work can also be used to study other parametric frequency conversion processes, which are realizable based on the interaction of counter-propagating waves in χ (2) media.…”

Section: Discussionmentioning

confidence: 99%

“…(2) and calculate the RMS error between the calculated and boundary profiles at the fundamental frequency,…”

Section: The Numerical Methods and The Algorithmmentioning

confidence: 99%

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Theory of backward second-harmonic generation of short laser pulses in periodically and aperiodically poled nonlinear crystals

et al. 2012

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We study numerically and analytically the backward second-harmonic generation in periodically and aperiodically poled nonlinear crystals in the quasiphase-matched regime. In our numerical analysis, we apply the optimum control technique based on the shooting method. Due to the fast and efficient numerical technique, we are able to analyze this frequency-conversion process in detail, taking into account various factors -the pump intensity, group-velocity mismatch and dispersion, linear phase mismatch, and "chirp" of nonlinear grating. Also we derive several approximate solutions for the backward harmonic efficiency employed in the undepleted pump approximation.

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“…Over the past decade, BSHG has become a subject of intense investigation ( [4] and references therein), owing to a wealth of predicted new phenomena [5,6] and to the technological progress in fabricating short period QPM gratings [7][8][9][10]. Since backward optical parametric oscillation was first proposed in [11], extensive theoretical and experimental studies have been carried out on various backward frequency conversion processes [5][6][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%