Twisting Light by Nonlinear Photonic Crystals

Bloch, Noa Voloch; Shemer, Keren; Shapira, Amos; Shiloh, Roni; Juwiler, Irit; Arie, Ady

doi:10.1103/physrevlett.108.233902

Cited by 151 publications

(126 citation statements)

References 26 publications

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“…3(a) a very narrow (high Q-factor) transmission peak for the FPC with a DBE, with 32 N = unit cells. This occurs at an angular frequency very close and lower than to the DBE angular frequency d ω , because strong reflection occurs at d ω and for higher frequencies due to an existing bandgap [10,11]. The transmitted spectrum is densely-packed with resonances, for the FPC with DBE near the DBE frequency.…”

Section: A Transmission Characteristicsmentioning

confidence: 99%

“…an expression of the operator M is given by [10,11] We outline here the method we use to evaluate the local density of states through the dyadic Green's function in Cartesian coordinates for an electric sheet current in the x-y plane, and located at an arbitrary point z′ in a stack of anisotropic layered media shown in the inset of Fig. 1, and described by symmetric permittivity dyadic as in (A2), by generalizing the scheme used in [51,67,68] .…”

Section: Appendix A: Transfer Matrices Of Anisotropic Layersmentioning

confidence: 99%

“…More elaborate designs of nanocavities adopted Silicon heterostructures [4], liquid crystals [5] technologies and demonstrated improved Q-factor compared to previously reported designs. The use of photonic crystals resulted in enhanced amplification properties for low-threshold lasing [2,6], enhanced directionalwave propagation through magneto-optical effects [7][8][9], nonlinear optics [10] and quantum processing [11].…”

Section: Introductionmentioning

confidence: 99%

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Giant gain enhancement in photonic crystals with a degenerate band edge

et al. 2016

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We propose a new approach leading to giant gain enhancement. It is based on unconventional slow wave resonance associated to a degenerate band edge (DBE) in the dispersion diagram for a special class of photonic crystals supporting two modes at each frequency. We show that the gain enhancement in a Fabry-Pérot cavity (FPC) when operating at the DBE is several orders of magnitude stronger when compared to a cavity of the same length made of a standard photonic crystal with a regular band edge (RBE). The giant gain condition is explained by a significant increase in the photon lifetime and in the local density of states. We have demonstrated the existence of DBE operated special cavities that provide for superior gain conditions for solid-state lasers, quantum cascade lasers, traveling wave tubes, and distributed solid state amplifiers. We also report the possibility to achieve low-threshold lasing in FPC with DBE compared to RBEbased lasers.

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Section: A Transmission Characteristicsmentioning

confidence: 99%

Section: Appendix A: Transfer Matrices Of Anisotropic Layersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Giant gain enhancement in photonic crystals with a degenerate band edge

et al. 2016

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“…18 Since the thickness of the thin film is comparable to the coherent length of nonlinear frequency conversion, more applications for complex wave front tailoring could be expected with the help of properly designed domain patterns.…”

Section: (B)mentioning

confidence: 99%

Ferroelectric domain inversion and its stability in lithium niobate thin film on insulator with different thicknesses

et al. 2016

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Ferroelectric domain inversion and its effect on the stability of lithium niobate thin films on insulator (LNOI) are experimentally characterized. Two sets of specimens with different thicknesses varying from submicron to microns are selected. For micron thick samples (~28 m), domain structures are achieved by pulsed electric field poling with electrodes patterned via photolithography. No domain structure deterioration has been observed for a month as inspected using polarizing optical microscopy and etching. As for submicron (540 nm) films, large-area domain inversion is realized by scanning a biased conductive tip in a piezoelectric force microscope. A graphic processing method is taken to evaluate the domain retention. A domain life time of 25.0 h is obtained and possible mechanisms are discussed. Our study gives a direct reference for domain structure-related applications of LNOI, including guiding wave nonlinear frequency conversion, nonlinear wavefront tailoring, electro-optic modulation, and piezoelectric devices.

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“…Cylindrical mode converters can provide high power and wide spectral coverage, but the generation of higher-order vortices is limited by the difficult requirement of higher-order Hermite-Gaussian modes as inputs [16]. Based on OAM conservation in nonlinear interactions, frequency conversion experiments have recently generated high-power and higher-order optical vortices at new but discrete wavelengths [13,17,18].…”

Section: Introductionmentioning

confidence: 99%

Controlled switching of orbital angular momentum in an optical parametric oscillator

Aadhi

Samanta

Kumar

et al. 2017

Optica

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Controlled switching of orbital angular momentum (OAM) of light at practical powers over arbitrary wavelength regions can have important implications for future quantum and classical systems. Here we report on a single source of OAM beams based on an optical parametric oscillator (OPO) that can provide all such capabilities. We demonstrate active transfer of OAM modes of any order, jl p j, of pump to the signal and idler in an OPO, to produce jl p j1 different OAM states by controlling the relative cavity losses of the resonated beams. As a proof-of-principle, we show that when pumping with the OAM states jl p j 1 and jl p j 2 for different relative losses of signal and idler, the OPO has two (j1;0i and j0;1i) and three (j2;0i, j1;1i, and j0;2i) output states, respectively. Our findings show that using a suitable loss modulator, one can achieve rapid switching of the OAM mode in OPO output beams in time.

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Twisting Light by Nonlinear Photonic Crystals

Cited by 151 publications

References 26 publications

Giant gain enhancement in photonic crystals with a degenerate band edge

Giant gain enhancement in photonic crystals with a degenerate band edge

Ferroelectric domain inversion and its stability in lithium niobate thin film on insulator with different thicknesses

Controlled switching of orbital angular momentum in an optical parametric oscillator

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