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In PT dimers, we show that transitions between the symmetric and broken phases can be reversed through inclusion of strongly coupled passive dimers that act as two-mode adiabatic bridges between the gain and loss sites.
We demonstrate numerically and analytically that laser self-termination can occur in complex photonic molecules made of more than two cavities. We also confirm our results in the presence of gain saturation nonlinearities.
We investigate optomechanical interactions in non-Hermitian photonic molecules. We show that the maximum enhancement of optomechanical coupling for steady state solutions is achieved for unbalanced gain and loss profiles away from exceptional points.
We present a new strategy for regulating light emission dynamics in high power laser arrays. Our approach is based on engineering the properties of non-Hermitian supersymmetric optical arrays and offers several advantages over previous investigations.
We propose a novel optical isolator design in a silicon based coupler with a single nonreciprocal arm and suitably index-matched reciprocal second arm. This structure displays high levels of optical isolation and low forward loss.
We introduce a bosonic quantization technique for generating PT photonic structures that possess hidden symmetries. We investigate light transport in these geometries under linear and nonlinear conditions and we demonstrate a host of new effects.
After realizing the counterintuitive fact that PT-symmetric Hamiltonians can exhibit entirely real spectra, intense studies have been devoted to extend the framework of quantum mechanics into the complex domain [1]. Quite recently however, the concept of PT-symmetry was introduced [2] and experimentally observed [3,4] in the framework of classical Optics. In this paper, we examine the peculiar properties...
We examine the unusual properties of multimoded PT-symmetric optical potentials. Multiple PT-thresholds, complex bifurcation mode organization, vortices in the transverse power flow, and phase singularities, are few of the exotic characteristics of multimode PT-Optics.
We study light propagation in disordered modulated Bloch arrays. For the specific system under consideration, our analysis predicts a 5 fold enhancement in light localization over that expected from a corresponding uniform lattice.
We study the light propagation in z-varying local parity-time symmetric coupled systems. We show that, unlike their conventional counterparts, our analysis predicts a peculiar unidirectional phase exchange.
We show that only in a unique class of z-dependent lattices a true accelerating and diffractionless beam (different from Airy) can exist. Such beams are also possible under nonlinear conditions as exact traveling lattice solitons.
In quantum theory, any Hamiltonian describing a physical system is mathematically represented by a self-adjoint linear operator to ensure the reality of the associated observables. In an attempt to extend quantum mechanics into the complex domain, it was realized few years ago that certain non-Hermitian parity-time ( ) symmetric Hamiltonians can exhibit an entirely real spectrum. Much...
We study the propagation of light in Bloch waveguide arrays exhibiting periodic coupling. Intriguing wavepacket revival patterns as well as beating Bloch oscillations are demonstrated. A new resonant delocalization phase transition is also predicted.
We describe a fiber-based Z-scan experiment for probing the nonlinear optical response of nanosuspensions that will provide a platform for deciding between rival different theoretical models.
We show that many-body effects in stabilized nano-suspensions can have a profound effect on their optical nonlinearity. The nonlinear properties of these colloids can range from polynomial to exponential depending on their composition and chemistry.
We investigate for the first time optical beam dynamics in parity-time (PT) synthetic structures. We show that PT symmetric systems can exhibit a host of intriguing characteristics such as non-reciprocal Bloch modes and power oscillations.
We show that light scattering from a cloud of nano-particles dispersed in a host medium can lead to the formation of self-induced transparent waveguides. The stability properties of these nonlinear propagation channels are examined.
We investigate the effect of nonlinearity in novel parity-time (PT) symmetric potentials. We show that new types of nonlinear self-trapped modes can exist in optical PT synthetic lattices.
We investigate the effect of nonlinearity in novel parity-time (PT) symmetric potentials. We show that new types of nonlinear self-trapped modes can exist in optical PT synthetic lattices.
We investigate for the first time optical beam dynamics in parity-time (PT) synthetic structures. We show that PT symmetric systems can exhibit a host of intriguing characteristics such as non-reciprocal Bloch modes and power oscillations.
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