High Resolution, High Collection Efficiency in Numerical Aperture Increasing Lens Microscopy of Individual Quantum Dots

We demonstrate the application of a subsurface solid immersion technique to the photoluminescence spectroscopy of individual quantum dots. Contrasted with the conventional solid immersion microscopy, we used a numerical aperture increasing lens and moved the interface between the sample and the soli...

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Bibliographic Details
Main Authors: Liu, Zhiheng, Goldberg, Bennett B, Ippolito, Stephen B, Vamivakas, Anthony N, Unlu, M S, Mirin, Richard
Format: Report
Language:English
Subjects:
Atomic and Molecular Physics and Spectroscopy
EFFICIENCY
HIGH COLLECTION EFFICIENCY
HIGH RESOLUTION
MICROSCOPY
NAIL(NUMERICAL APERTURE INCREASING LENS)
NUMERICAL APERTURE
Optics
PHOTOLUMINESCENCE
PHOTOLUMINESCENCE SPECTROSCOPY
QD(QUANTUM DOTS)
QUANTUM DOTS
Quantum Theory and Relativity
SOLID IMMERSION
SPECTROSCOPY
Statistics and Probability
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Description
Summary:We demonstrate the application of a subsurface solid immersion technique to the photoluminescence spectroscopy of individual quantum dots. Contrasted with the conventional solid immersion microscopy, we used a numerical aperture increasing lens and moved the interface between the sample and the solid immersion lens away from the focal plane, thus diminished the influence of interface artifacts on the images obtained in a two-dimensional scan. Meanwhile, our technique has achieved a high spatial resolution of lambda/3 that is capable of resolving the spectroscopic features of single QDs. We also demonstrate that the collection efficiency of our system is six times better than that of a conventional confocal microscope with a high NA objective. Published in Applied Physics Letters, v87 article ID 071905, 9 Aug 2005. Prepared in cooperation with the Departments of Physics and of Electrical and Computer Engineering, Boston University, Boston, MA.