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Measuring the topological charge of vortex beams by using an annular ellipse aperture
Measuring the topological charge vortex beams an annular ellipse aperture
2013/7/3
We theoretically and experimentally investigate the Fraunhofer diffraction pattern of a vortex beam passing through an annular ellipse aperture. It is found that the pat-tern of the far-field diffract...
Detecting the topological charge of vortex beams using an annular triangle aperture
Vortex beam Topological charge Annular triangle aperture
2013/7/3
The Fraunhofer diffraction pattern of a vortex beam by an annular triangle aperture is analyzed theoretically and experimentally. It is found that the pattern of the far-field diffraction intensity di...
Supersensitive measurement of angular displacements using entangled photons
Supersensitive measurement angular displacements entangled photons
2010/11/17
We show that the use of entangled photons having non-zero orbital angular momentum (OAM) increases the resolution and sensitivity of angular-displacement measurements performed using an interferomete...
Measuring the orbital angular momentum of elliptical vortex beams by using a slit hexagon aperture
Orbital angular momentum Elliptical vortex beam Hexagon aperture
2013/7/3
The far- fi eld diffraction pattern of an elliptical vortex beam by a slit hexagon aperture is investigated theoretically and experimentally. It is found that the number of the dark spots or stripes i...
Determination of the vacuum optomechanical coupling rate using frequency noise calibration
Determination vacuum optomechanical coupling frequency noise calibration
2010/10/20
The strength of optomechanical interactions in a cavity optomechanical system can be quantified by a vacuum coupling rate g0 analogous to cavity quantum electrodynamics. This single figure of merit re...
Discrimination of binary coherent states using a homodyne detector and a photon number resolving detector
photon number resolving homodyne detector
2010/3/10
We investigate quantum measurement strategies capable of discriminating two coherent states probabilistically with significantly smaller error probabilities than can be obtained using non- probabilist...
Measuring the Topological Charge of Integer and Fraction Vortices Using Multipoint Plates
vortex beams multipoint plates interference
2013/7/3
The topological charge of integral vortex beams with a single circle of multipoints has previously been measured. In this work, we theoretically and experimental study the diffraction patterns of vort...
Top-emitti ng organic light-emitting devices based on silicon substrate using Delta -dop ing technique
OLED Top-emitting Ultrathin EL Spectra Efficiency
2013/7/3
We have fabri cated a Top-em itting orga nic light- emitti ng de vice on silicon subs trate Delta -doping technique. Usin g ultrathin quinac ridone as emitt ing layer, t he perform ance of Top- emitti...
An updated search of steady TeV γ-ray point sources in northern hemisphere using the Tibet air shower array
ASγ experiment γ-ray point sources 90% C.L. flux pper limits
2009/8/17
Using the data taken from Tibet II High Density (HD) Array (1997 February—1999 September) and Tibet-III array (1999 November—2005 November), our previous northern sky survey for TeV γ-ray point source...
Single-photon logic gates using minimal resources
Single-photon logic gates minimal resources
2013/7/3
We present a simple architecture for deterministic quantum circuits operating on single-photon qubits. Few resources are necessary to implement two elementary gates and can be recycled for computing w...
Justification of Spherical Approximations using Degree of Linear Polarization of Hot Electron Luminescence from GaAs Crystal
degree of linear polarization heavy hole peak
2010/4/13
The anisotropic momentum distribution of photoexcited hot electrons on recombination with holes at the acceptor level produces linearly polarized luminescence. It is found that the degree of linear po...