Light beams with selective angular momentum generated by hybrid plasmonic waveguides

Liang, Yao; Wu, Han; Huang, Bin; Huang, Xu

doi:10.1039/c4nr03606a

Cited by 36 publications

(29 citation statements)

References 27 publications

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“…In this section, we choose a hybrid plasmonic structure as a polarization rotator to realize the polarization rotation function. Comparing with the all-dielectric structure, the hybrid plasmonic one can effectively downsize the footprint of device due to its high birefringence [34]. For the HP-PR, it contains a nanophotonic core with the same width (w 2 ) and height (h) for transmitting the quasi-CPL modes, and on the right top of it, there is an L-shaped Ag structure with length (L 1 ) and thickness (t).…”

Section: The Integrated Polarization Rotatormentioning

confidence: 99%

“…Hybrid plasmonic waveguides [30] are fundamentally important building blocks for PICs due to their extraordinary characteristics, such as considerable birefringence effect, subwavelength confinement with low loss transmission and polarization control, which have been validly investigated in many integrated optical systems [30][31][32][33][34]. Thus, by steering birefringence effect and polarization rotation effect of hybrid plasmonic waveguides it provides a great potential for on chip PICs to distinguish photons with opposite SAM.…”

Section: Introductionmentioning

confidence: 99%

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On chip chirality-distinguishing beamsplitter

et al. 2017

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The chirality of photons plays a fundamental role in light-matter interactions. However, a limiting factor in photonic integrated circuits is the lack of a miniaturized component, which can distinguish the chirality in a low cost and integrated manner. Herein we numerically demonstrate a chirality-distinguishing beamsplitter that can address this challenge. It consists of an integrated polarization rotator and a linear polarization beamsplitter, which together can fulfill the task of distinguishing and splitting left- and right-handed quasi-circularly polarized modes on a chip with an ultra-broadband operation range from 1.45 μm to 1.65 μm. Owning to the reciprocity, the device can emit photons with selectable spin angular momentum depending on the chosen feeding waveguide. The device is compatible with complementary metal-oxide semiconductor technology and it may open up new avenues in the fields of on-chip nano-photonics, bio-photonics and quantum information science.

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Section: The Integrated Polarization Rotatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On chip chirality-distinguishing beamsplitter

et al. 2017

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“…However, to the best of our knowledge, guiding of higher-order OAM mode in the integrated waveguide has not been investigated. There have been several works in which only the waveguide structures for the l = ± 1 OAM mode were proposed as the parts of the devices to generate OAM (l = ±1) in a form of PIC [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

On-Chip Guiding of Higher-Order Orbital Angular Momentum Modes

Lee

Kim

2019

Photonics

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Higher-order orbital angular momentum (OAM) mode guiding in a waveguide which is suitable for on-chip integration has been investigated. Based on the relation between the Laguerre-Gaussian mode and the Hermite-Gaussian mode, it has been shown that two degenerate guided modes of π/2l-rotation symmetry can support the l-th order OAM mode. In order to mimic the rotational symmetry, we have proposed the waveguide structure of a cross-shaped core and designed a waveguide that can support OAM modes of ±1 and ±2 topological charges simultaneously at a wavelength of 1550 nm. Purity of the OAM modes guided in the designed waveguide has been assessed by numerically calculating their topological charges from the field distribution, which were close to the theoretical values. We also investigated the guiding of OAM modes of ±3 and ±4 topological charges in our proposed waveguide structure, which revealed the possibility of the separate guiding of those OAM modes with relatively lower purity.

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“…In 2008, Zhang et al proposed the concept of hybrid plasmonic waveguides (HPWs) [1]. Since then, this topic has attracted considerable interest as promising candidate for integrated photonic circuits (IPCs) [1][2][3][4]. The tipical HPW structure consists of a dielectric nanowire and a metal strip, which are separated by a low-index dielectric material [1,5].…”

Section: Introductionmentioning

confidence: 99%

“…The tipical HPW structure consists of a dielectric nanowire and a metal strip, which are separated by a low-index dielectric material [1,5]. Due to their unique characteristics in subwavelength optical confinement [1], significant birefringence effect [2], polarization rotation [5], and relative long range propagation [3], HPWs can push conventional optical components to the subwavelength scale [5][6][7]. Bymanipulating the phase and polarization of the incoming light, the HPWs can control the propagation of light in unprecedented ways, enabling many applications, i.e., optical telecommunication and interconnects [4], polarization convter [5], nanofocusing [6] and one-way mode conversion [7].…”

Section: Introductionmentioning

confidence: 99%

Diodelike asymmetric transmission in hybrid plasmonic waveguides via breaking polarization symmetry

Zhang

Liang

et al. 2017

J. Phys. D: Appl. Phys.

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The ability to control the asymmetric propagation of light in nanophotonic waveguides is of fundamental importance for optical communications and on-chip signal processing. However, in most studies so far, the design of such structures has been based on asymmetric mode conversion where multi-mode waveguides are involved. Here we propose a hybrid plasmonic structure that performs optical diode behavior via breaking polarization symmetry in single mode waveguides. The exploited physical mechanism is based on the combination of polarization rotation and polarization selection. The whole device is ultra-compact with a footprint of 2.95 × 14.18 μm 2 , whose dimension is much smaller than the device previously proposed for the similar function. The extinction ratio is greater than 11.8 dB for both forward and backward propagation at λ = 1550 nm (19.43 dB for forward propagation and 11.8 dB for the backward one). The operation bandwidth of the device is as great as 70 nm (form 1510 to 1580 nm) for extinction > 10 dB. These results may find important applications in the integrated devices where polarization handling or unidirectional propagation is required.

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Light beams with selective angular momentum generated by hybrid plasmonic waveguides

Cited by 36 publications

References 27 publications

On chip chirality-distinguishing beamsplitter

On chip chirality-distinguishing beamsplitter

On-Chip Guiding of Higher-Order Orbital Angular Momentum Modes

Diodelike asymmetric transmission in hybrid plasmonic waveguides via breaking polarization symmetry

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