Tunable supercontinuum light vector vortex beam generator using a q-plate

Rumala, Yisa S.; Milione, Giovanni; Nguyen, Thien An; Pratavieira, Sebastião; Hossain, Zabir; Nolan, Daniel A.; Slussarenko, Sergei; Karimi, Ebrahim; Marrucci, Lorenzo; Alfano, R. R.

doi:10.1364/ol.38.005083

Cited by 96 publications

(43 citation statements)

References 36 publications

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“…Due to their distinctive polarization distributions, VV beams have shown unique features, making them appealing for different research purposes, e.g. microscopy [54], optical trapping [55,56], metrology [57,58], nanophotonics [59] and communication [60][61][62][63][64][65][66][67]. Formally, the state |R, (|L, ) describes a photon with uniform right (left) circular polarization carrying of OAM, and a VV beam can be conveniently described by a non-separable superposition of polarization-OAM eigenmodes.…”

Section: Vector Vortex Beam and Hybrid Entanglement Generationmentioning

confidence: 99%

Air-core fiber distribution of hybrid vector vortex-polarization entangled states

et al. 2019

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Entanglement distribution between distant parties is one of the most important and challenging tasks in quantum communication. Distribution of photonic entangled states using optical fiber links is a fundamental building block towards quantum networks. Among the different degrees of freedom, orbital angular momentum (OAM) is one of the most promising due to its natural capability to encode high dimensional quantum states. In this article, we experimentally demonstrate fiber distribution of hybrid polarization-vector vortex entangled photon pairs. To this end, we exploit a recently developed air-core fiber which supports OAM modes. High fidelity distribution of the entangled states is demonstrated by performing quantum state tomography in the polarization-OAM Hilbert space after fiber propagation, and by violations of Bell inequalities and multipartite entanglement tests. The present results open new scenarios for quantum applications where correlated complex states can be transmitted by exploiting the vectorial nature of light.

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Section: Vector Vortex Beam and Hybrid Entanglement Generationmentioning

confidence: 99%

Air-core fiber distribution of hybrid vector vortex-polarization entangled states

et al. 2019

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“…Equation 1 describes a vector beam, [15][16][17] which in the language of quantum mechanics is a hybrid-superposition, a superposition state of A home-made electromagnetic coil is used to apply a longitudinal magnetic field to the warm atomic vapor. We use a resistance wire as a slide rheostat to adjust the coil current to obtain precise settings of the weak magnetic field intensity.…”

Section: 11mentioning

confidence: 99%

Magnetic-field-induced rotation of light with orbital angular momentum

Shi

Ding

Zhou

et al. 2015

Applied Physics Letters

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Light carrying orbital angular momentum (OAM) has attractive applications in the fields of precise optical measurements and high capacity optical communications. We study the rotation of a light beam propagating in warm 87 Rb atomic vapor using a method based on magnetic-fieldinduced circular birefringence. The dependence of the rotation angle on the magnetic field makes it appropriate for weak magnetic field measurements. We quote a detailed theoretical description that agrees well with the experimental observations. The experiment shown here provides a method to measure the magnetic field intensity precisely and expands the application of OAMcarrying light. This technique has advantage in measurement of magnetic field weaker than 0.5Gauss, and the precision we achieved is 0.8 mGauss.

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“…In addition to high-power applications of liquid crystals in laser optics [1][2][3][4][5], optical power limiters [6][7], cholesteric lasers [8][9][10][11][12][13][14][15][16], some recent new photonics applications of liquid crystals are phase plates with singularities (including q-plates with inhomogeneous patterned distribution of the local optical axis in the transverse plane) [17][18][19][20][21][22][23] and nanophotonics [24][25][26]. The purpose of this paper is to familiarize the reader with some applications of liquid crystals in quantum science and quantum engineering using as examples the experiments and methods developed at the Institute of Optics, University of Rochester [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Single-photon experiments with liquid crystals for quantum science and quantum engineering applications

Lukishova¹,

Liapis²,

Bissell³

et al. 2014

Liquid Crystals Reviews

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We present here our results on using liquid crystals in experiments with nonclassical light sources:(1) single-photon sources exhibiting antibunching (separation of all photons in time), which are key components for secure quantum communication systems, and (2) entangled photon source with photons exhibiting quantum interference in a Hong-Ou-Mandel interferometer. In the first part, both nematic and cholesteric liquid crystal hosts were used to create definite linear or circular polarization of antibunched photons emitted by different types of single emitters (dye molecules, nanocrystal quantum dots, nanodiamonds with color centers, etc.). If the photon has unknown polarization, filtering it through a polarizer to produce the desired polarization for quantum key distribution with bits based on polarization states of photons will reduce by half the efficiency of a quantum cryptography system. In the first part, we also provide our results on observation of a circular polarized microcavity resonance in nanocrystal quantum dot fluorescence in a 1-D chiral photonic bandgap cholesteric liquid crystal microcavity. In the second part of this paper with indistinguishable, time-entangled photons, we demonstrate our experimental results on simulating quantum-mechanical barrier tunnelling phenomena. A HongOu-Mandel dip (quantum interference effect) is shifted when a phase change was introduced on the way of one of entangled photons in pair (one arm of the interferometer) by inserting in this arm an electrically controlled planar-aligned nematic liquid crystal layer between two prisms in the conditions close to a frustrated total internal reflection. By applying different AC-voltages to the planar-aligned nematic layer and changing its refractive index, we can obtain various conditions for incident photon propagation -from total reflection to total transmission. Measuring changes of tunnelling times of photon through this structure with femtosecond resolution permitted us to answer some unresolved questions in quantum-mechanical barrier tunnelling phenomena.Keywords: polarized single-photon source, antibunching, nanocrystal quantum dots, NV-color-centers in nanodiamonds, nematic, cholesteric liquid crystals, Hong-OuMandel interferometer, entangled photons, quantum mechanical barrier tunnelling time, double-prism structure, frustrated total internal reflection A c c e p t e d M a n u s c r i p t

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Tunable supercontinuum light vector vortex beam generator using a q-plate

Cited by 96 publications

References 36 publications

Air-core fiber distribution of hybrid vector vortex-polarization entangled states

Air-core fiber distribution of hybrid vector vortex-polarization entangled states

Magnetic-field-induced rotation of light with orbital angular momentum

Single-photon experiments with liquid crystals for quantum science and quantum engineering applications

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