A Compact Hybrid Plasmonic Polarization Rotator for Silicon-Based Slot Waveguides

Xu, Yin; Xiao, Jinbiao; Sun, Xiaohan

doi:10.1109/lpt.2014.2329021

Cited by 37 publications

(11 citation statements)

References 24 publications

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“…But the misalignment of the metal and the center of the LN ridge is inevitable the overlay of electron beam lithography (EBL). When such asymmetric hybrid structure occurs, TE0 and TM0 modes will rotate to each other because of mode-interference [30]- [32]. The influence of the z misalignment, z is calculated as well.…”

Section: Resultsmentioning

confidence: 99%

Broadband and Compact TE-Pass Polarizer Based on Hybrid Plasmonic Grating on LNOI Platform

Dai

Zhao

et al. 2021

IEEE Photonics J.

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A broadband and compact TE-pass/TM-stop polarizer is presented based on hybrid plasmonic grating (HPG) on an x-cut Lithium-Niobate-on-isolator (LNOI) platform. By comprehensively analyzing the effects of metal width on mode effective index, mode similarity, and mode conversion, we demonstrate the structure with a narrow metal layer. The simulation results indicate that the polarizer with a compact length of 9 m achieves an extinction ratio over 20 dB within the wavelength range from 1470 nm to 1700 nm. The insertion loss is below 2.3 dB in C-band. Furthermore, the polarizer exhibits large fabrication tolerance to current fabrication technology.

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Section: Resultsmentioning

confidence: 99%

Broadband and Compact TE-Pass Polarizer Based on Hybrid Plasmonic Grating on LNOI Platform

Dai

Zhao

et al. 2021

IEEE Photonics J.

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“…At z = L c , the CE is 99.9% and the corresponding ER is −32.4dB. Additionally, the insertion loss (IL) is defined as IL(dB) = −10log 10 (P y /P input ) with P input being the input power and P y being the power of input y-polarized component [7]. The calculated IL is 0.004dB.…”

Section: B Improved Pcmentioning

confidence: 99%

“…With the development of optical communication society, the demand for high-performance optical devices is also increasing. Polarization converters (PCs), which play an important role in polarization diversity systems, attract the interest of many researchers, and several types of PCs have also been investigated and proposed [1]- [7]. Initially, a PC based on multi-section asymmetric rib waveguides was proposed [1].…”

Section: Introductionmentioning

confidence: 99%

“…However, this kind of PC suffers from a long device length and large transition losses between alternating sections. After that, several waveguide type PCs [3]- [7] have been designed. In order to realize the optical axis rotation of a waveguide, some specific asymmetric structures have been introduced, such as off-axis double cores [3], asymmetric Si nanowire [4], bi-level tapers [5], and so on.…”

Section: Introductionmentioning

confidence: 99%

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Design of polarization converter based on photonic crystal fiber with anisotropic lattice core consisting of circular holes

et al. 2017

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In this paper, we propose a novel polarization converter (PC) based on a photonic crystal fiber (PCF) with an anisotropic square lattice core consisting of circular air holes. Utilizing the core symmetry oriented at a 45-degree to the principal axes, an incident polarized light beam can be completely rotated 90 • . Simulation results by using a vectorial finite element beam propagation method show that the polarization conversion is achieved at a device length of 119 μm. Additionally, an improved PC element that can provide a high-consistent Gaussian-like mode distribution to decrease the splice loss with conventional fibers has also been studied. The polarization conversion efficiency is better than 99% and the corresponding extinction ratio is better than −20dB over a wavelength range of 310 nm.

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“…To overcome this drawback, polarization diversity scheme composed of polarization splitters and rotators is normally leveraged to realize a polarization-transparent circuit 5 . In such a scheme, the key constituent elements, e.g., polarization splitters 6 7 and rotators 8 9 , are usually separate components so that the length of the whole device is very long. Apparently, it is against the dense integration with high reliability and stability.…”

mentioning

confidence: 99%

Ultracompact and high efficient silicon-based polarization splitter-rotator using a partially-etched subwavelength grating coupler

Xiao

2016

Sci Rep

Self Cite

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On-chip polarization manipulation is pivotal for silicon-on-insulator material platform to realize polarization-transparent circuits and polarization-division-multiplexing transmissions, where polarization splitters and rotators are fundamental components. In this work, we propose an ultracompact and high efficient silicon-based polarization splitter-rotator (PSR) using a partially-etched subwavelength grating (SWG) coupler. The proposed PSR consists of a taper-integrated SWG coupler combined with a partially-etched waveguide between the input and output strip waveguides to make the input transverse-electric (TE) mode couple and convert to the output transverse-magnetic (TM) mode at the cross port while the input TM mode confine well in the strip waveguide during propagation and directly output from the bar port with nearly neglected coupling. Moreover, to better separate input polarizations, an additional tapered waveguide extended from the partially-etched waveguide is also added. From results, an ultracompact PSR of only 8.2 μm in length is achieved, which is so far the reported shortest one. The polarization conversion loss and efficiency are 0.12 dB and 98.52%, respectively, together with the crosstalk and reflection loss of −31.41/−22.43 dB and −34.74/−33.13 dB for input TE/TM mode at wavelength of 1.55 μm. These attributes make the present device suitable for constructing on-chip compact photonic integrated circuits with polarization-independence.

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A Compact Hybrid Plasmonic Polarization Rotator for Silicon-Based Slot Waveguides

Cited by 37 publications

References 24 publications

Broadband and Compact TE-Pass Polarizer Based on Hybrid Plasmonic Grating on LNOI Platform

Broadband and Compact TE-Pass Polarizer Based on Hybrid Plasmonic Grating on LNOI Platform

Design of polarization converter based on photonic crystal fiber with anisotropic lattice core consisting of circular holes

Ultracompact and high efficient silicon-based polarization splitter-rotator using a partially-etched subwavelength grating coupler

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