Cryogenic photoluminescence imaging system for nanoscale positioning of single quantum emitters

Liu, J., Davanço, M. I., Sapienza, L., Konthasinghe, K., De Miranda Cardoso, J. V., Song, J. D., Badolato, A. and Srinivasan, K. (2017) Cryogenic photoluminescence imaging system for nanoscale positioning of single quantum emitters. Review of Scientific Instruments, 88(2), 023116. (doi: 10.1063/1.4976578)

Abstract

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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sapienza, Dr Luca and Badolato, Professor Antonio
• Authors: Liu, J., Davanço, M. I., Sapienza, L., Konthasinghe, K., De Miranda Cardoso, J. V., Song, J. D., Badolato, A., and Srinivasan, K.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Review of Scientific Instruments
• Publisher: AIP Publishing
• ISSN: 0034-6748
• ISSN (Online): 1089-7623
• Published Online: 23 February 2017