Multiphoton path-entanglement generation by concurrent parametric down-conversion in a single<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>χ</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:msup></mml:math>nonlinear photonic crystal

Gong, Yan‐Xiao; Xu, Ping; Bai, Y. F.; Yang, Jie; Leng, H. Y.; Xie, Zhenda; Zhu, Shining

doi:10.1103/physreva.86.023835

Cited by 17 publications

(14 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nonlinear photonic crystals, characterized by a two-dimensional periodic modulation of the nonlinear response [1-3], offer a high degree of flexibility for engineering the properties of optical parametric processes, because of the multeplicity of vectors of the nonlinear lattice providing quasi phase matching. When considering the generation of twin photons or twin-beams by parametric down-conversion (PDC), these photonic crystals have shown interesting potentialities as monolithic sources of path entangled photonic states [4][5][6], and may provide novel compact schemes for continuous-variable quantum technologies [7].…”

Section: Introductionmentioning

confidence: 99%

Golden ratio entanglement in hexagonally poled nonlinear crystals

et al. 2018

View full text Add to dashboard Cite

This work analyses the quantum state of twin photons and twin beams generated by parametricdown conversion in a hexagonally poled photonic crystal, characterized by the simultaneous presence of two nonlinear processes sustained by two vectors of the reciprocal lattice. In those special points of the fluorescence spectrum where the two processes coexist, we show that a tripartite entangled state is realized, equivalent to a single parametric process followed by a beam-splitter. By proper angle tuning a peculiar resonance condition is reached, with a transition to a 4-mode entanglement, dominated by the Golden Ratio of the segment φ = (1 + √ 5)/2. A maximal coherence between the two nonlinear processes is here estabilished, as the overall process is shown to be equivalent to two independent parametric processes followed by a beam-splitter. We offer an interpretation of the occurrence of the golden ratio in this system based on an analogy between the evolution of the light modes and the Fibonacci sequence.

show abstract

Section: Introductionmentioning

confidence: 99%

Golden ratio entanglement in hexagonally poled nonlinear crystals

et al. 2018

View full text Add to dashboard Cite

show abstract

“…4 plots the logarithm of the mean number of photons sampled on the QPM branches Σ 0 and Σ 11 as a function ofḡz along the crystal, comparing the use of a single pump versus a dual symmetric pump with the same total energy. The gain enhancement factors γ are estimated by fitting the numerical data, averaged over portions of the corresponding QPM branches far away from the hot-spots, with the prediction of the 2-mode parametric model (11) according to which N = sinh 2 (γḡz). Precisely, they are (troncate 1% hot spots) (non troncata) obtained from linear fits of the approximated relation log(N) ≈ 2γḡz valid forḡz 1 (black lines).…”

Section: Two-mode Processesmentioning

confidence: 99%

Efficient parametric generation in a nonlinear photonic crystal pumped by a dual beam

Brambilla

Gatti

2019

Opt. Express

View full text Add to dashboard Cite

We investigate parametric down-conversion in a hexagonally poled nonlinear photonic crystal, pumped by a dual pump with a transverse modulation that matches the periodicity of the χ (2) nonlinear grating. A peculiar feature of this resonant configuration is that the two pumps simultaneously generate photon pairs over an entire branch of modes, via quasi-phasematching with both fundamental vectors of the reciprocal lattice of the nonlinearity. The parametric gain of these modes depends thus coherently on the sum of the two pump amplitudes and can be controlled by varying their relative intensities and phases. We find that a significant enhancement of the source conversion efficiency, comparable to that of one-dimensionally poled crystals, can be achieved by a dual symmetric pump. We also show how the four-mode coupling arising among shared modes at resonance can be tailored by changing the dual pump parameters.Considering e.g. inversion domains shaped as discs of radius R = 0.28Λ (Fig. 2(a)), one has d 01 = d 10 = 0.32d e f f [22], d e f f denoting the effective nonlinear susceptibility of the χ (2) material.

show abstract

“…32 In particular, up to five-photon NOON state can be generated, which enables phase supersensitive measurements at the Heisenberg limit. When a different combination of QPM geometries is adopted, a heralded single-photon multipartite entanglement can be achieved.…”

Section: Integrated Engineering Of Polarization- Path-and Hyper-ementioning

confidence: 99%

“…25 Moreover, the generated entangled photons can been controlled with full freedom offered by designed domain structures in crystals, demonstrating two-photon focusing, 26,27 beam-splitting and other novel effects, [28][29][30][31][32][33][34][35][36][37][38][39] which can hardly be realized in a uniform nonlinear crystal. This will bring revolutionary impacts on quantum optics and quantum information science in future.…”

Section: Introductionmentioning

confidence: 99%

“…Secondly, spectral and spatial entanglement may be transformed by the structure design of NPC. [26][27][28][29][30][31][32][33][34][35][36][37][38][39] High-dimensional entanglement or hyper-entanglement will be generated under multiple concurrent QPM SPDC processes. In recent years, great attentions have been paid to the domain-engineered NPC for its special functionality in the integrated spectral and spatial control of entangled photons, which is inherent to the SPDC process.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Review Article: Quasi-phase-matching engineering of entangled photons

Zhu

2012

AIP Advances

Self Cite

View full text Add to dashboard Cite

Quasi-phase-matching (QPM) technique has been successfully applied in nonlinear optics, such as optical frequency conversion. Recently, remarkable advances have been made in the QPM generation and manipulation of photon entanglement. In this paper, we review the current progresses in the QPM engineering of entangled photons, which are finished mainly by our group. By the design of concurrent QPM processes insides a single nonlinear optical crystal, the spectrum of entangled photons can be extended or shaped on demand, also the spatial entanglement can be transformed by transverse inhomogeneity of domain modulation, resulting in new applications in path-entanglement, quantum Talbot effects, quantum imaging etc. Combined with waveguide structures and the electro-optic effect, the entangled photons can be generated, then guided and phase-controlled within a single QPM crystal chip. QPM devices can act as a key ingredient in integrated quantum information processing

show abstract

Multiphoton path-entanglement generation by concurrent parametric down-conversion in a singleχ(2)nonlinear photonic crystal

Cited by 17 publications

References 40 publications

Golden ratio entanglement in hexagonally poled nonlinear crystals

Golden ratio entanglement in hexagonally poled nonlinear crystals

Efficient parametric generation in a nonlinear photonic crystal pumped by a dual beam

Review Article: Quasi-phase-matching engineering of entangled photons

Contact Info

Product

Resources

About