25 Nov 2025 Tue 4 pm

Nonresonant optical pumping allows one to create effective potentials for exciton–polariton condensates without any etched or fabricated cavity structures. By shaping the pump intensity in real space, one engineers spatially varying reservoirs whose repulsive interaction with the condensate generates “cavity-like” potentials. These optically written potentials support localized modes, modified dispersion, and tunable coupling between spatially separated condensates. In this talk I will discuss how nonresonant pump profiles translate into effective potentials in the open-dissipative Gross–Pitaevskii framework, how mode competition and growth-rate nonlinearities arise in symmetric and asymmetric two-mirror configurations, and why interference-mediated reservoir overlap plays a central role in determining the condensation threshold.

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