With the goal of designing more compact optical schemes, cavity solitons have emerged as a potentially useful strategy for information storage, where a bit of information is represented by a cavity soliton. Cavity solitons may develop instabilities like start moving, breathing, or oscillating. In the latter case, LS oscillate in time while remaining stationary in space. It has also been demonstrated the existence ofa route in which oscillating Cavity Solitons are destroyed, leading to an excitable regime [1,2].The goal of the present work is to go a step further and discuss the potential of cavity solitons, in particular in a Kerr medium, in carrying out computations, i.e., not just for information storage. The key is the excitability exhibited by these cavity solitons. In particular, we will show how to design logic gates with cavity solitons, namely the AND , OR and NOT gates , as by combination of them one can construct any logical operation. In this work cavity solitons are in the excitable regime, what implies that if suitably perturbed (i.e . with a superthreshold perturbation) elicit a excitable excursion. For our computational porpoises we consider the presence of an excitable excursion as a bit' I ' and the absence of the excursion as a bit '0'.As shown recently, pumping the system with a plane wave an a Gaussian beam on top of it, the threshold of excitability can be tuned by changing the amplitude of the Gaussian beam [3]. Here we consider three excitable cavity soliton in a linear arrangement, whose position is fixed by the Gaussian localized beam . The two outer cavity solitons will represent the input signals , while the central one will be the output signal. By varying the excitability threshold and the distance between the structures the response of the central soliton to perturbations on the outer ones can be controlled and, therefore, different logic gates can be achieved.The logic gates reported in this work are two gates involving two inputs and one output (the AND and OR gates) , and one gate involving one input and one output (the NOT gate) . In Fig.
No abstract
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.