Cryogenic photoluminescence imaging system for nanoscale positioning of single quantum emitters
We report a photoluminescence imaging system for locating single quantum emitters with respect to alignment features. Samples are interrogated in a 4 K closed-cycle cryostat by a high numerical aperture (NA = 0.9, 100× magnification) objective that sits within the cryostat, enabling high efficiency...
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Veröffentlicht in: | Review of scientific instruments 2017-02, Vol.88 (2), p.023116-023116 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We report a photoluminescence imaging system for locating single quantum emitters with respect to alignment features. Samples are interrogated in a 4 K closed-cycle cryostat by a high numerical aperture (NA = 0.9, 100× magnification) objective that sits within the cryostat, enabling high efficiency collection of emitted photons without image distortions due to the cryostat windows. The locations of single InAs/GaAs quantum dots within a
>
50
μm × 50 μm field of view are determined with
≈
4.5
nm uncertainty (one standard deviation) in a 1 s long acquisition. The uncertainty is determined through a combination of a maximum likelihood estimate for localizing the quantum dot emission, and a cross correlation method for determining the alignment mark center. This location technique can be an important step in the high-throughput creation of nanophotonic devices that rely upon the interaction of highly confined optical modes with single quantum emitters. |
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ISSN: | 0034-6748 1089-7623 1089-7623 |
DOI: | 10.1063/1.4976578 |