Realization of Parity-Time-Symmetry Breaking in Delay Coupled Semiconductor Lasers

2015 ◽  
Author(s):  
Joseph S. Suelzer ◽  
Yogesh N. Joglekar ◽  
Gautam Vemuri
Keyword(s):  
Symmetry Breaking ◽  
Semiconductor Lasers ◽  
Time Symmetry ◽  
Coupled Semiconductor

scholarly journals Parity-time symmetry breaking in optically coupled semiconductor lasers

2016 ◽  
Author(s):  
Joseph S. Suelzer ◽  
Yogesh N. Joglekar ◽  
Gautam Vemuri
Keyword(s):  
Symmetry Breaking ◽  
Semiconductor Lasers ◽  
Time Symmetry ◽  
Coupled Semiconductor

scholarly journals Parity–Time Symmetry in Bidirectionally Coupled Semiconductor Lasers

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 122 ◽  
Author(s):  
Andrew Wilkey ◽  
Joseph Suelzer ◽  
Yogesh Joglekar ◽  
Gautam Vemuri
Keyword(s):  
Semiconductor Lasers ◽  
Electric Fields ◽  
Single Mode ◽  
Equation Model ◽  
Rate Equations ◽  
Symmetric System ◽  
Time Symmetry ◽  
Complicating Factors ◽  
Future Work ◽  
Coupled Semiconductor

We report on the numerical analysis of intensity dynamics of a pair of mutually coupled, single-mode semiconductor lasers that are operated in a configuration that leads to features reminiscent of parity–time symmetry. Starting from the rate equations for the intracavity electric fields of the two lasers and the rate equations for carrier inversions, we show how these equations reduce to a simple 2 × 2 effective Hamiltonian that is identical to that of a typical parity–time (PT)-symmetric dimer. After establishing that a pair of coupled semiconductor lasers could be PT-symmetric, we solve the full set of rate equations and show that despite complicating factors like gain saturation and nonlinearities, the rate equation model predicts intensity dynamics that are akin to those in a PT-symmetric system. The article describes some of the advantages of using semiconductor lasers to realize a PT-symmetric system and concludes with some possible directions for future work on this system.

Symmetry-Breaking Bifurcations in Rings of Delay-Coupled Semiconductor Lasers

2015 ◽  
Vol 14 (4) ◽  
pp. 1868-1898 ◽  
Author(s):  
Pietro-Luciano Buono ◽  
Juancho A. Collera
Keyword(s):  
Symmetry Breaking ◽  
Semiconductor Lasers ◽  
Coupled Semiconductor

scholarly journals Effects of Asymmetric Coupling Strength on Nonlinear Dynamics of Two Mutually Long-Delay-Coupled Semiconductor Lasers

Photonics ◽  
2022 ◽  
Vol 9 (1) ◽  
pp. 28
Author(s):  
Bin-Kai Liao ◽  
Chin-Hao Tseng ◽  
Yu-Chen Chu ◽  
Sheng-Kwang Hwang
Keyword(s):  
Nonlinear Dynamics ◽  
Semiconductor Lasers ◽  
Coupling Strength ◽  
Spectral Features ◽  
Time Symmetry ◽  
Numerical Predictions ◽  
Dynamical Behaviors ◽  
Asymmetric Coupling ◽  
High Asymmetry ◽  
Coupled Semiconductor

This study investigates the effects of asymmetric coupling strength on nonlinear dynamics of two mutually long-delay-coupled semiconductor lasers through both experimental and numerical efforts. Dynamical maps and spectral features of dynamical states are analyzed as a function of the coupling strength and detuning frequency for a fixed coupling delay time. Symmetry in the coupling strength of the two lasers, in general, symmetrizes their dynamical behaviors and the corresponding spectral features. Slight to moderate asymmetry in the coupling strength moderately changes their dynamical behaviors from the ones when the coupling strength is symmetric, but does not break the symmetry of their dynamical behaviors and the corresponding spectral features. High asymmetry in the coupling strength not only strongly changes their dynamical behaviors from the ones when the coupling strength is symmetric, but also breaks the symmetry of their dynamical behaviors and the corresponding spectral features. Evolution of the dynamical behaviors from symmetry to asymmetry between the two lasers is identified. Experimental observations and numerical predictions agree not only qualitatively to a high extent but also quantitatively to a moderate extent.

scholarly journals Chaos Synchronization and Spontaneous Symmetry-Breaking in Symmetrically Delay-Coupled Semiconductor Lasers

2001 ◽  
Vol 86 (5) ◽  
pp. 795-798 ◽  
Author(s):  
Tilmann Heil ◽  
Ingo Fischer ◽  
Wolfgang Elsässer ◽  
Josep Mulet ◽  
Claudio R. Mirasso
Keyword(s):  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Semiconductor Lasers ◽  
Chaos Synchronization ◽  
Coupled Semiconductor

Independently synchronizable groups in networks of delay-coupled semiconductor lasers

2021 ◽  
pp. 1-1
Author(s):  
Liyue Zhang ◽  
Wei Pan ◽  
Lianshan Yan ◽  
Bin Luo ◽  
Xihua Zou ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
Coupled Semiconductor

scholarly journals Quantum Zeno effects across a parity-time symmetry breaking transition in atomic momentum space

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Tao Chen ◽  
Wei Gou ◽  
Dizhou Xie ◽  
Teng Xiao ◽  
Wei Yi ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
State Of The Art ◽  
Cold Atom ◽  
Pt Symmetry ◽  
Level System ◽  
Flexible Control ◽  
Time Symmetry ◽  
Symmetry Phase ◽  
Lattice Quantum ◽  
Atomic Momentum

AbstractWe experimentally study quantum Zeno effects in a parity-time (PT) symmetric cold atom gas periodically coupled to a reservoir. Based on the state-of-the-art control of inter-site couplings of atoms in a momentum lattice, we implement a synthetic two-level system with passive PT symmetry over two lattice sites, where an effective dissipation is introduced through repeated couplings to the rest of the lattice. Quantum Zeno (anti-Zeno) effects manifest in our experiment as the overall dissipation of the two-level system becoming suppressed (enhanced) with increasing coupling intensity or frequency. We demonstrate that quantum Zeno regimes exist in the broken PT symmetry phase, and are bounded by exceptional points separating the PT symmetric and PT broken phases, as well as by a discrete set of critical coupling frequencies. Our experiment establishes the connection between PT-symmetry-breaking transitions and quantum Zeno effects, and is extendable to higher dimensions or to interacting regimes, thanks to the flexible control with atoms in a momentum lattice.

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