A high stability beam-scanning confocal optical microscope for low temperature operation

Grazioso, Fabio; Patton, Brian; Smith, Jason M.

doi:10.1063/1.3484140

Cited by 12 publications

(9 citation statements)

References 16 publications

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“…The microcavity assembly comprises a set of piezoelectric actuators that provide full control of the cavity length and relative position of the planar and concave mirrors at cryogenic temperature ( figure 1(b)). All measurements are carried out at 77 K in a dry He exchange gas environment with the container supported in a liquid nitrogen bath cryostat [24]. Further details of the experimental apparatus can be found in section A of the supplementary information.…”

Section: Experimental Methodsmentioning

confidence: 99%

Tunable cavity coupling of the zero phonon line of a nitrogen-vacancy defect in diamond

et al. 2015

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We demonstrate the tunable enhancement of the zero phonon line of a single nitrogen-vacancy colour centre in diamond at cryogenic temperature. An open cavity fabricated using focused ion beam milling provides mode volumes as small as 1.24 μm 3 (4.7 3 l ) and quality factor Q 3000.  In situ tuning of the cavity resonance is achieved with piezoelectric actuators. At optimal coupling to a TEM 00 cavity mode, the signal from individual zero phonon line transitions is enhanced by a factor of 6.25 and the overall emission rate of the NV − centre is increased by 40% compared with that measured from the same centre in the absence of cavity field confinement. This result represents a step forward in the realisation of efficient spin-photon interfaces and scalable quantum computing using optically addressable solid state spin qubits.

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Section: Experimental Methodsmentioning

confidence: 99%

Tunable cavity coupling of the zero phonon line of a nitrogen-vacancy defect in diamond

et al. 2015

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“…Our patented sample transfer system in combination with a sample scanning stage, instead of beam-scanning [36,37], allows us to quickly insert (and remove) samples with attached frozen immersion droplets, into the precooled cryostat. Additionally, the optical properties of the whole setup will be increased by using sample scanning.…”

Section: Discussionmentioning

confidence: 99%

Resolution enhancement for low-temperature scanning microscopy by cryo-immersion

et al. 2016

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Abstract:Here we report a simple way to enhance the resolution of a confocal scanning microscope under cryogenic conditions. Using a microscope objective (MO) with high numerical aperture (NA = 1.25) and 1-propanol as an immersion fluid with low freezing temperature we were able to reach an imaging resolution at 160 K comparable to ambient conditions. The MO and the sample were both placed inside the inner chamber of the cryostat to reduce distortions induced by temperature gradients. The image quality of our commercially available MO was further enhanced by scanning the sample (sample scanning) in contrast to beam scanning. The ease of the whole procedure marks an essential step towards the development of cryo high-resolution microscopy and correlative light and electron cryo microscopy (cryoCLEM).

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“…Photoluminescence (PL) imaging and spectroscopy were performed using a custom-built scanning confocal microscope that allowed the sample to be cooled in a bath cryostat, the full design and specifications of which are reported elsewhere [24]. Excitation was performed using a frequency-doubled YAG laser (λ = 532 nm) with a maximum power delivery to the sample of 13 mW, and a PicoQuant GaInN diode laser (λ = 473 nm) that can be operated in both continuous wave (cw) and Q-switched modes, the latter delivering pulses of 100 ps duration.…”

Section: Methodsmentioning

confidence: 99%

“…apparatus [24], taking into account the slightly lower detection efficiency of the single-photon counter (Perkin Elmer SPCM AQR series) at the shorter emission wavelength.…”

Section: Excitation Power Dependencementioning

confidence: 99%

Optical properties of a single-colour centre in diamond with a green zero-phonon line

et al. 2011

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Abstract. We report the photoluminescence characteristics of a colour centre in diamond grown by plasma-assisted chemical vapour deposition. The colour centre emits with a sharp zero-phonon line at 2.330 eV (λ = 532 nm) and a lifetime of 3.3 ns, thus offering potential for a high-speed singlephoton source with green emission. It displays a vibronic emission spectrum with a Huang-Rhys parameter of 2.48 at 77 K. Hanbury-Brown and Twiss measurements reveal that the electronic level structure of the defect includes a metastable state that can be populated from the optically excited state.

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A high stability beam-scanning confocal optical microscope for low temperature operation

Cited by 12 publications

References 16 publications

Tunable cavity coupling of the zero phonon line of a nitrogen-vacancy defect in diamond

Tunable cavity coupling of the zero phonon line of a nitrogen-vacancy defect in diamond

Resolution enhancement for low-temperature scanning microscopy by cryo-immersion

Optical properties of a single-colour centre in diamond with a green zero-phonon line

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