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
Hauptverfasser: Liu, Jin, Davanço, Marcelo I., Sapienza, Luca, Konthasinghe, Kumarasiri, De Miranda Cardoso, José Vinícius, Song, Jin Dong, Badolato, Antonio, Srinivasan, Kartik
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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.
ISSN:0034-6748
1089-7623
1089-7623
DOI:10.1063/1.4976578