GTRI has designed and assembled several optical and optomechanical sytems optimized for integration with vacuum systems. These optics use off-the-shelf optical components, yet achieve large numerical aperture, large FOVs, and good ion resolution (the three ions shown are spaced by approximately 7 µm and are imaged with a numerical aperture of 0.43). Designs are diffraction limited; however, tolerancing indicates that the centration error from using off-the-shelf components is the leading source of blur in the resulting images.
GTRI has also designed and toleranced an ambitious optical system for NA = 0.5 and an FOV of 1mm diameter.
GTRI has designed a relay optic for use in the multiscale optical collection system. A micromirror(ROC ≈ 150 µm) integrated into the ion trap is used as the collector. A relay system composed of off-the-shelf optics allows micromirrors to be located anywhere with a 16mm diameter FOV to simultaneously and independently perform state detection on ions. Simulations performed by GTRI using this relay system demonstrate that the multiscale optical system is robust to substantial misalignments and fabrication errors, including ion location, mirror ROC, and mirror figure without active alignment. The first-generation mircromirror trap is in fabrication and should collet 15% of light fluoresced by the ion.
Diagram of the ion trap with an integrated
mirror (b), mounted in a UHV chamber (a).
Scattered photons collected by a relay optic
are detected by a CCD camera and a PMT.
Diagram of a multi-scale light collection
system for a proposed trap with an array
Demonstration of integrated microscale optics in surface-electrode ion traps, J True Merrill, Curtis Volin, David Landgren, Jason M Amini, Kenneth Wright, S Charles Doret, C-S Pai, Harley Hayden, Tyler Killian, Daniel Faircloth, Kenneth R Brown, Alexa W Harter, Richart E Slusher, arXiv:1105.4905