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arXiv · 1706.07858

Fabrication of Precision Hemispherical Mirrors for Quantum Optics Applications

Daniel B. Higginbottom·Geoff T. Campbell·Gabriel Araneda·Fengzhou Fang·Yves Colombe·Ben C. Buchler·Ping Koy Lam
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Abstract

High precision, high numerical aperture mirrors are desirable for mediating strong atom-light coupling in quantum optics applications and can also serve as important reference surfaces for optical metrology. In this work we demonstrate the fabrication of highly-precise hemispheric mirrors with numerical aperture NA = 0.996. The mirrors were fabricated from aluminum by single-point diamond turning using a stable ultra- precision lathe calibrated with an in-situ white-light interferometer. Our mirrors have a diameter of 25 mm and were characterized using a combination of wide-angle single- shot and small-angle stitched multi-shot interferometry. The measurements show root- mean-square (RMS) form errors consistently below 25 nm. The smoothest of our mirrors has a RMS error of 14 nm and a peak-to-valley (PV) error of 88 nm, which corresponds to a form accuracy of $\lambda$=50 for visible optics.

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Daniel B. Higginbottom, Geoff T. Campbell, Gabriel Araneda, Fengzhou Fang, Yves Colombe, Ben C. Buchler, Ping Koy Lam. 2017-06-22. Fabrication of Precision Hemispherical Mirrors for Quantum Optics Applications. https://doi.org/10.1038/s41598-017-18637-8

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