Excitability and self-pulsing in a photonic crystal nanocavity

Brunstein, Maia; Yacomotti, A. M.; Sagnes, I.; Raineri, Fabrice; Bigot, Laurent; Levenson, Ariel

doi:10.1103/physreva.85.031803

Cited by 88 publications

(68 citation statements)

References 23 publications

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“…However, only the response to a single perturbation has been analyzed and, contrary to many other optical excitable systems where the refractory time has been directly or indirectly observed [19][20][21][22][23], the refractory period of this excitable system has not been measured yet.…”

Section: Introductionmentioning

confidence: 99%

Refractory period of an excitable semiconductor laser with optical injection

et al. 2017

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Injection-locked semiconductor lasers can be brought to a neuron-like excitable regime when parameters are set close to the unlocking transition. Here we study experimentally the response of this system to repeated optical perturbations and observe the existence of a refractory period during which perturbations are not able to elicit an excitable response. The results are analyzed via simulations of a set of dynamical equations which reproduced adequately the experimental results.

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Section: Introductionmentioning

confidence: 99%

Refractory period of an excitable semiconductor laser with optical injection

et al. 2017

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“…High Qfactor rings can even start to self-pulsate, as light will generate free carriers which will change the refractive index [6]. Similar to [4,7], we will demonstrate how this self-pulsation is linked with excitability. In literature the mechanism behind this self-pulsation (or excitability) in microrings, microdisks and similar passive cavities is often explained using Coupled Mode Theory (CMT).…”

Section: Introductionmentioning

confidence: 99%

“…A SNN consists of spiking neurons, i.e., excitable (nonlinear) dynamical systems [3]. As some photonic components are excitable [4,5], they can be used to implement a spiking neuron in hardware. In this paper, we focus on a simple Silicon-On-Insulator (SOI) microring.…”

Section: Introductionmentioning

confidence: 99%

Cascadable excitability in microrings

Vaerenbergh¹,

Fiers²,

Mechet³

et al. 2012

Opt. Express

125

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To emulate a spiking neuron, a photonic component needs to be excitable. In this paper, we theoretically simulate and experimentally demonstrate cascadable excitability near a self-pulsation regime in high-Q-factor silicon-on-insulator microrings. For the theoretical study we use Coupled Mode Theory. While neglecting the fast energy and phase dynamics of the cavity light, we can still preserve the most important microring dynamics, by only keeping the temperature difference with the surroundings and the amount of free carriers as dynamical variables of the system. Therefore we can analyse the microring dynamics in a 2D phase portrait. For some wavelengths, when changing the input power, the microring undergoes a subcritical Andronov-Hopf bifurcation at the selfpulsation onset. As a consequence the system shows class II excitability. Experimental single ring excitability and self-pulsation behaviour follows the theoretic predictions. Moreover, simulations and experiments show that this excitation mechanism is cascadable.

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“…Theoretically, they outperform the computational power of non-spiking artificial neural network types [1]. Given the natural appearance of excitability in many different non-linear optical components, both lasing [2,3,4,5,6,7] and non-lasing [8,9,10], there is an intrinsic advantage of implementing such networks in photonic hardware as this would allow to operate at time-scales that are orders of magnitude faster than typical biological and electronic implementations [11]. In this article, microdisk lasers are being proposed as a basic building block for an integrated photonic SNN platform.…”

Section: Introductionmentioning

confidence: 99%

Excitation transfer between optically injected microdisk lasers

Vaerenbergh¹,

Alexander²,

Dambre³

et al. 2013

Opt. Express

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Abstract:Recently, we have theoretically demonstrated that optically injected microdisk lasers can be tuned in a class I excitable regime, where they are sensitive to both inhibitory and excitatory external input pulses. In this paper, we propose, using simulations, a topology that allows the disks to react on excitations from other disks. Phase tuning of the intermediate connections allows to control the disk response. Additionally, we investigate the sensitivity of the disk circuit to deviations in driving current and locking signal wavelength detuning. Using state-of-the-art fabrication techniques for microdisk laser, the standard deviation of the lasing wavelength is still about one order of magnitude too large. Therefore, compensation techniques, such as wavelength tuning by heating, are necessary.

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Excitability and self-pulsing in a photonic crystal nanocavity

Cited by 88 publications

References 23 publications

Refractory period of an excitable semiconductor laser with optical injection

Refractory period of an excitable semiconductor laser with optical injection

Cascadable excitability in microrings

Excitation transfer between optically injected microdisk lasers

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