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ABSTRACT: The ability to manipulate nano-particles at the nano-scale is critical for the development of active quantum systems. This paper presents a technique to manipulate diamond nano-crystals at the nano-scale using a scanning electron microscope, nano-manipulator and custom tapered optical fibre probes. The manipulation of a approximately 300 nm diamond crystal, containing a single nitrogen-vacancy centre, onto the endface of an optical fibre is demonstrated. The emission properties of the single photon source post manipulation are in excellent agreement with those observed on the original substrate.
Optics Express 08/2009; 17(14):11287-93. · 3.59 Impact Factor
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ABSTRACT: An unexplored diamond defect centre which is found to emit stable single photons at a measured rate of 1.6 MHz at room temperature is reported. The novel centre, identified in chemical vapour deposition grown diamond crystals, exhibits a sharp zero phonon line at 734 nm with a full width at half maximum of ~ 4 nm. The photon statistics confirm the center is a single emitter and provides direct evidence of the first true two-level single quantum system in diamond.
Applied Physics Letters 05/2009; 94:203107. · 3.84 Impact Factor
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M.P. Hiscocks,
C.J. Kaalund,
F. Ladouceur,
B.C. Gibson,
S. Trpkovski,
S.T. Huntington,
D. Simpson, E. Ampem-Lassen,
F. Hossain,
L. Hollenberg,
S. Prawer,
J.E. Butler
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ABSTRACT: Diamond photonic devices present a range of opportunities due to their unique properties. This paper presents progress in the fabrication of diamond waveguides using reactive ion etching (RIE), as a step towards all-diamond optics.
Optical Internet, 2007 and the 2007 32nd Australian Conference on Optical Fibre Technology. COIN-ACOFT 2007. Joint International Conference on; 07/2007
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ABSTRACT: This paper presents some initial findings that explore the material properties of LiNbO<sub>3</sub> which has been exposed to a microwave plasma-enhanced chemical vapor deposition (MPCVD) environment. The LiNbO<sub>3</sub> was found to undergo a process known as 'reduction' when exposed to this environment. A technique was developed to reverse this process and recover the LiNbO<sub>3</sub>, which is a crucial first step towards the integration of diamond-based single photon sources with LiNbO<sub>3</sub> waveguide technologies.
Optoelectronic and Microelectronic Materials and Devices, 2006 Conference on; 01/2007
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ABSTRACT: Here we demonstrate the use of differential interference contrast microscopy with the inverse Abel transform to accurately obtain the refractive-index profile of a single-mode optical fiber. The application of this nondestructive imaging analysis technique provides high precision refractive-index information about the fiber. This technique is robust, rapid, and has diffraction limited spatial resolution.
IEEE Photonics Technology Letters 11/2005; · 2.19 Impact Factor
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ABSTRACT: We present a new technique for determining the refractive index profiles of axially symmetric optical fibers based on imaging phase gradients introduced into a transmitted optical field by a fiber sample. An image of the phase gradients within the field is obtained using a new non-interferometric technique based on bright field microscopy. This provides sufficient information to reconstruct the refractive index profile using the inverse Abel transform. The technique is robust, rapid and possesses high spatial resolution and we demonstrate its application to the reconstruction of the refractive index profiles of a single-mode and a multimode optical fiber.
Optics Express 06/2005; 13(9):3277-82. · 3.59 Impact Factor
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ABSTRACT: Near-field scanning optical microscopy is used in emission mode to measure the mode profile of singlemode fibre. Excellent agreement is obtained between the mode profile of a singlemode fibre measured using emission and collection modes and qualitative agreement obtained between measurements made on a multimoded fibre and a simple theoretical model.
Electronics Letters 07/2004; · 0.96 Impact Factor
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ABSTRACT: The application of quantitative phase microscopy to refractive-index profiling of optical fibers is demonstrated. Phase images of axially symmetric optical fibers immersed in index-matching fluid are obtained, and the inverse Abel transform is used to obtain the radial refractive-index profile. This technique is straightforward, nondestructive, repeatable, and accurate. Excellent agreement, to within approximately 0.0005, between this method and the index profile obtained with a commercial profiler is obtained.
Optics Letters 01/2003; 27(23):2061-3. · 3.40 Impact Factor
