Volume 130, Number 5, June 2020
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||23 June 2020|
Realizing arbitrary trapping potentials for light via direct laser writing of mirror surface profiles(a)
Institut für Angewandte Physik, Universität Bonn - Wegelerstr. 8, 53115 Bonn, Germany
Received: 9 April 2020
Accepted: 14 June 2020
The versatility of quantum gas experiments greatly benefits from the ability to apply variable potentials. Here we describe a method which allows the preparation of potential structures for microcavity photons via spatially selective deformation of optical resonator geometries with a heat-induced mirror surface microstructuring technique. We investigate the thermalization of a two-dimensional photon gas in a dye-filled microcavity composed of the custom surface-structured mirrors at wavelength-scale separation. Specifically, we describe measurements of the spatial redistribution of thermal photons in a coupled double-ridge structure, where photons form a Bose-Einstein condensate in a spatially split ground state, as a function of different pumping geometries.
PACS: 42.50.-p – Quantum optics / 42.50.Dv – Quantum state engineering and measurements / 42.82.Cr – Fabrication techniques; lithography, pattern transfer
© EPLA, 2020
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