Optical Bistability under Nonresonant Excitation in Spinor Polariton Condensates

Pickup, Lucinda; Kalinin, Kirill P.; Askitopoulos, Alexis; Hatzopoulos, Z.; Savvidis, P. G.; Berloff, Natalia G.; Lagoudakis, Pavlos G.

doi:10.1103/physrevlett.120.225301

Cited by 51 publications

(37 citation statements)

References 28 publications

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“…Therefore, while the previous two models (Refs. [26][27][28] and [12,25]) can separately explain parts of our results successfully, they fail to grasp the full picture.…”

Section: Theory and Simulationsmentioning

confidence: 78%

“…We report on two distinct and unusual effects: spin inversion, which forms condensates with elliptical polarization (spin) of the opposite handedness to that of the nonresonant pump, and spin/intensity bistability with pump power. While such effects were recently reported [26,27], both were attributed to an interplay of linear polarization splitting and spin-asymmetric reservoir nonlinearities within a zero-dimensional model [28]. Studying the dependence of these effects on pump polarization ellipticity and trap size reveals that these two phenomena (1) are strongly trap-size dependent, (2) can only be observed within a certain range of pump ellipticity, (3) can be observed independently from each other, indicating they arise from different physical processes, and (4) are position dependent.…”

Section: Introductionmentioning

confidence: 92%

“…Such driven-dissipative mean-field models have proven very successful at describing the phenomenology of polariton condensates [18]. Projecting the order parameter onto the ground state of the optically induced trap, the equations for the two components can be written [12,[25][26][27][28]…”

Section: Theory and Simulationsmentioning

confidence: 99%

“…This set of equations reduces to previously used models with different limiting values of the parameters: for R o = g 2 = Г s = 0 one recovers the equations in Refs. [26][27][28], and for R s = R o , P + = P − , g 1 = g 2 = Г s = 0, and adiabatically eliminating the reservoir dynamics one gets the equations in Refs. [12,25].…”

Section: Theory and Simulationsmentioning

confidence: 99%

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Observation of inversion, hysteresis, and collapse of spin in optically trapped polariton condensates

et al. 2019

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The spin and intensity of optically trapped polariton condensates are studied under steady-state elliptically polarized nonresonant pumping. Three distinct effects are observed: (1) spin inversion where condensation occurs in the opposite handedness from the pump, (2) spin and intensity hysteresis as the pump power is scanned, and (3) a sharp "spin collapse" transition in the condensate spin as a function of the pump ellipticity. We show these effects are strongly dependent on trap size and sample position and are linked to small counterintuitive energy differences between the condensate spin components. Our results, which fail to be fully described within the commonly used nonlinear equations for polariton condensates, show that a more accurate microscopic picture is needed to unify these phenomena in a two-dimensional condensate theory.

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“…Therefore, while the previous two models (Refs. [26][27][28] and [12,25]) can separately explain parts of our results successfully, they fail to grasp the full picture.…”

Section: Theory and Simulationsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 92%

Section: Theory and Simulationsmentioning

confidence: 99%

Section: Theory and Simulationsmentioning

confidence: 99%

See 2 more Smart Citations

Observation of inversion, hysteresis, and collapse of spin in optically trapped polariton condensates

et al. 2019

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“…For example, consider a cavity with a resonance frequency ω 0 = 360 THz, a total loss rate Γ = 10 GHz, and U/Γ = 0.01; these values are typical for III-V semiconductor cavities in Ref. [32,33,43,44]. The calculations in Figs.…”

Section: Sensitivity and Detection Speedmentioning

confidence: 99%

Enhancing the Speed and Sensitivity of a Nonlinear Optical Sensor with Noise

Rodriguez

2020

Phys. Rev. Applied

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We demonstrate how noise can be turned into an advantage for optical sensing using a nonlinear cavity. The cavity is driven by a continuous wave laser into the regime of optical bistability. Due to the influence of fluctuations, the cavity randomly switches between two states. By analyzing residence times in these two states, perturbations to the resonance frequency of the cavity can be detected. Here, such an analysis is presented as a function of the strength of the perturbation and of the noise. By increasing the standard deviation of the noise, we find that the detection speed increases monotonically while the sensitivity peaks at a finite value of the noise strength. Furthermore, we discuss how noise-assisted sensing can be optimized in state-of-the-art experimental platforms, relying solely on the minimum amount of noise present in the cavity due to its dissipation. These results open new perspectives for the ultrafast detection of nanoparticles, contaminants, gases, or other perturbations to the resonance frequency of an optical resonator, at low powers and in noisy environments.

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Toward Arbitrary Control of Lattice Interactions in Nonequilibrium Condensates

Kalinin

Berloff

2019

Adv Quantum Tech

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There is a growing interest in investigating new states of matter using out‐of‐equilibrium lattice spin models in two dimensions. However, a control of pairwise interactions in such systems has been elusive as due to their nonequilibrium nature they maintain nontrivial particle fluxes even at the steady state. Here it is suggested how to overcome this problem and formulate a method for engineering reconfigurable networks of nonequilibrium condensates with control of individual pairwise interactions. Representing spin by condensate phase, the effective two spin interactions are created with nonresonant pumping, are directed with dissipative channels, and are further controlled with dissipative gates. The dissipative barriers are used to block unwanted interactions between condensates. Together, spatial anisotropy of dissipation and pump profiles allow an effective control of sign and intensity of the coupling strength between any two neighbouring sites independent of the rest of the spins, which is demonstrated with a 2D square lattice of polariton condensates. Experimental realization of such fully controllable networks offers great potential for reservoir computing, modelling of the systems of coupled oscillators, simulation of the new state of matters, studying the phase transitions in large‐scale systems, and optimization.

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Optical Bistability under Nonresonant Excitation in Spinor Polariton Condensates

Cited by 51 publications

References 28 publications

Observation of inversion, hysteresis, and collapse of spin in optically trapped polariton condensates

Observation of inversion, hysteresis, and collapse of spin in optically trapped polariton condensates

Enhancing the Speed and Sensitivity of a Nonlinear Optical Sensor with Noise

Toward Arbitrary Control of Lattice Interactions in Nonequilibrium Condensates

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