Ultrathin fiber-taper coupling with nitrogen vacancy centers in nanodiamonds at cryogenic temperatures

Abstract

We demonstrate cooling of ultrathin fiber tapers coupled with nitrogen vacancy (NV) centers in nanodiamonds to cryogenic temperatures. Nanodiamonds containing multiple NV centers are deposited on the subwavelength 480-nm-diameter nanofiber region of fiber tapers. The fiber tapers are successfully cooled to 9 K using our home-built mounting holder and an optimized cooling speed. The fluorescence from the nanodiamond NV centers is efficiently channeled into a single guided mode and shows characteristic sharp zero-phonon lines of both neutral and negatively charged NV centers. The present nanofiber/nanodiamond hybrid systems at cryogenic temperatures can be used as NV-based quantum information devices and for highly sensitive nanoscale magnetometry in a cryogenic environment.

7 pages. Top downloads in December 2015

References in corpus (6)

• The Quantum Internet
• Cavity QED on a nanofiber using a composite photonic crystal cavity
• Highly efficient coupling of photons from nanoemitters into single-mode optical fibers
• Tapered fiber coupling of single photons emitted by a deterministically positioned single nitrogen vacancy center
• Optical transmittance degradation in tapered fibers
• Coupling of ultrathin tapered fibers with high-Q microsphere resonators at cryogenic temperatures and observation of phase-shift transition from undercoupling to overcoupling

Cited by in corpus (12)

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• Optical-nanofiber-based interface for single molecules
• Monitoring spin coherence of single nitrogen-vacancy centers in nanodiamonds during pH changes in aqueous buffer solutions
• Tailoring a nanofiber for enhanced photon emission and coupling efficiency from single quantum emitters
• Effect of surface oxidation on electron spin coherence of single nitrogen-vacancy centers in nanodiamonds
• Efficient fiber in-line single photon source based on colloidal single quantum dots on an optical nanofiber
• Observation of rotational Brownian motion of single diamond nanoparticles
• Direct optical excitation of an NV center via a nanofiber Bragg-cavity: A theoretical simulation
• Nanofiber-based high-Q microresonator for cryogenic applications
• Occurrence control of charged exciton for a single CdSe quantum dot at cryogenic temperatures on an optical nanofiber
• Tilted Nanofiber Bragg Grating as an efficient photon collector from single quantum emitters: A new avenue