Fabrication and characterization of super-polished wedged borosilicate nano-cells.

We report on the fabrication of an all-glass vapor cell with a thickness varying linearly between (exactly) 0 and similar to 1 mu m. The cell is made in Borofloat glass that allows state-of-theart super polish roughness, a full optical bonding assembling and easy filling with alkali vapors. We detail the challenging manufacture steps and present experimental spectra resulting from fluorescence and transmission spectroscopy of the cesium D1 line. The very small surface roughness of 1 angstrom rms is promising to investigate the atom-surface interaction or to minimize parasite stray light. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.