Chirped circular dielectric gratings for near-unity collection efficiency from quantum emitters in bulk diamond
Name
oe-25-26-32420.pdf
Description
Published version
Size
5.99 MB
Format
Adobe PDF
Checksum (MD5)
ec6267be22464cc9e0d456140f276bdc
Author(s)
Zheng, Jiabao
Chen, Edward H.
Englund, Dirk R.
Date Issued
December 2017
Journal
Optics Express
Publisher
Optical Society of America
Citation
Zheng, Jiabao et al. "Chirped circular dielectric gratings for near-unity collection efficiency from quantum
emitters in bulk diamond." Optics Express 25, 26 (December 2017): 32420 © 2017 Optical Society of America
Version
Final published version
Abstract
Efficient collection of fluorescence from nitrogen vacancy (NV) centers in diamond underlies the spin-dependent optical read-out that is necessary for quantum information processing and enhanced sensing applications. The optical collection e ciency from NVs within diamond substrates is limited primarily due to the high refractive index of diamond and the non-directional dipole emission. Here we introduce a light collection strategy based on chirped, circular dielectric gratings that can be fabricated on a bulk diamond substrate to modify an emitter’s far-field radiation pattern. Using a genetic optimization algorithm, these grating designs achieve 98.9% collection e ciency for the NV zero-phonon emission line, collected from the back surface of the diamond with an objective of aperture 0.9. Across the broadband emission spectrum of the NV (600-800 nm), the chirped grating achieves 82.2% collection e ciency into a numerical aperture of 1.42, corresponding to an oil immersion objective again on the back side of the diamond. Our proposed bulk-dielectric grating structures are applicable to other optically active solid state quantum emitters in high index host materials.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1364/OE.25.032420
