Nash Equilibria in All-Optical Networks

2005 ◽  
pp. 1033-1045 ◽  
Author(s):  
George F. Georgakopoulos ◽  
Dimitris J. Kavvadias ◽  
Leonidas G. Sioutis
Keyword(s):  
Optical Networks ◽  
Nash Equilibria ◽  
All Optical

scholarly journals On Nash Equilibria in Non-Cooperative All-Optical Networks

Algorithms ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 15
Author(s):  
Vittorio Bilò ◽  
Michele Flammini ◽  
Luca Moscardelli
Keyword(s):  
Optical Networks ◽  
Network Topology ◽  
Nash Equilibria ◽  
Price Of Anarchy ◽  
Complete Information ◽  
Point Of View ◽  
Minimal Level ◽  
Cooperative Agents ◽  
All Optical ◽  
Network Provider

We consider the problem of determining a routing in all-optical networks, in which some couples of nodes want to communicate. In particular, we study this problem from the point of view of a network provider that has to design suitable payment functions for non-cooperative agents, corresponding to the couples of nodes wishing to communicate. The network provider aims at inducing stable routings (i.e., routings corresponding to Nash equilibria) using a low number of wavelengths. We consider three different kinds of local knowledge that agents may exploit to compute their payments, leading to three corresponding information levels. Under complete information, the network provider can design a payment function, inducing the agents to reach a Nash equilibrium mirroring any desired routing. If the price to an agent is computed only as a function of the wavelengths used along connecting paths (minimal level) or edges (intermediate level), the most reasonable functions either do not admit Nash equilibria or admit very inefficient ones, i.e., with the largest possible price of anarchy. However, by suitably restricting the network topology, a constant price of anarchy for chains and rings and a logarithmic one for trees can be obtained under the minimal and intermediate levels, respectively.

On Nash Equilibria in Non-cooperative All-Optical Networks

2005 ◽  
pp. 448-459 ◽  
Author(s):  
Vittorio Bilò ◽  
Michele Flammini ◽  
Luca Moscardelli
Keyword(s):  
Optical Networks ◽  
Nash Equilibria ◽  
All Optical

scholarly journals Nash equilibria in all-optical networks

2009 ◽  
Vol 309 (13) ◽  
pp. 4332-4342 ◽  
Author(s):  
George F. Georgakopoulos ◽  
Dimitris J. Kavvadias ◽  
Leonidas G. Sioutis
Keyword(s):  
Optical Networks ◽  
Nash Equilibria ◽  
All Optical

scholarly journals Signaling free localization of node failures in all-optical networks

2014 ◽  
Author(s):  
Janos Tapolcai ◽  
Lajos Ronyai ◽  
Eva Hosszu ◽  
Pin-Han Ho ◽  
Suresh Subramaniam
Keyword(s):  
Optical Networks ◽  
All Optical ◽  
Node Failures

scholarly journals All-optical dynamic tuning of local excitonic emission of monolayer MoS2 by integration with Ge2Sb2Te5

Nanophotonics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 2351-2359
Author(s):  
Hao Ouyang ◽  
Haitao Chen ◽  
Yuxiang Tang ◽  
Jun Zhang ◽  
Chenxi Zhang ◽  
...  
Keyword(s):  
Thin Film ◽  
Phase Change ◽  
Optical Networks ◽  
Dominant Role ◽  
Laser Pulses ◽  
Coulomb Interactions ◽  
Optical Modulators ◽  
Dynamic Tuning ◽  
All Optical ◽  
Excitonic Emission

AbstractStrong quantum confinement and coulomb interactions induce tightly bound quasiparticles such as excitons and trions in an atomically thin layer of transitional metal dichalcogenides (TMDs), which play a dominant role in determining their intriguing optoelectronic properties. Thus, controlling the excitonic properties is essential for the applications of TMD-based devices. Here, we demonstrate the all-optical tuning of the local excitonic emission from a monolayer MoS2 hybridized with phase-change material Ge2Sb2Te5 (GST) thin film. By applying pulsed laser with different power on the MoS2/GST heterostructure, the peak energies of the excitonic emission of MoS2 can be tuned up to 40 meV, and the exciton/trion intensity ratio can be tuned by at least one order of magnitude. Raman spectra and transient pump-probe measurements show that the tunability originated from the laser-induced phase change of the GST thin film with charge transferring from GST to the monolayer MoS2. The dynamic tuning of the excitonic emission was all done with localized laser pulses and could be scaled readily, which pave a new way of controlling the excitonic emission in TMDs. Our findings could be potentially used as all-optical modulators or switches in future optical networks.

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