High contrast circular grating reflector on silicon-on-insulator platform

Gao, Shitao; Yang, Weijia; Wang, Ke; Skafidas, Efstratios

doi:10.1364/ol.41.000520

Cited by 15 publications

(3 citation statements)

References 18 publications

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“…Therefore, one way to boost the r2reflection coefficient is to add a curved grating to the terminated end to reflect back the portion of the mode which iscoupled to the DMD waveguide modes. We adapted the curved grating design in [40] and we saw some improvement in the r2coefficient anda 10% increase in the transmitted power of the double-stub resonator (results not shown). Regardless of how well the curved grating in a DMD waveguide is designed, due to the finite height of the grating blades the reflected SPP wave will suffer from radiation loss as it propagates through them.…”

Section: B Double-stub Resonatorsmentioning

confidence: 97%

Guidelines for designing 2D and 3D plasmonic stub resonators

Naghizadeh

Kocabaş

2016

J. Opt. Soc. Am. B

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In this work we compare the performance of plasmonic waveguide integrated stub resonators based on 2D metaldielectric-metal (MDM) and 3D slot-waveguide (SWG) geometries. We show that scattering matrix theory can be extended to 3D devices, and by employing scattering matrix theory we provide the guidelines for designing plasmonic 2D and 3D single-stub and double-stub resonators with a desired spectral response at the design wavelength. We provide transmission maps of 2D and 3D double-stub resonators versus stub lengths, and we specify the different regions on these maps that result in a minimum, a maximumor a plasmonically induced transparency (PIT) shape in the transmission spectrum. Radiation loss from waveguide terminations leads to a degradation of the 3D slot-waveguide based resonators. We illustrate improved waveguide terminations that boost resonator properties. We verify our results with 3D FDTD simulations.

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Section: B Double-stub Resonatorsmentioning

confidence: 97%

Guidelines for designing 2D and 3D plasmonic stub resonators

Naghizadeh

Kocabaş

2016

J. Opt. Soc. Am. B

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“…The length of these Bragg gratings usually exceeds hundreds of microns, which is not conductive to the further miniaturization of photonic devices. Recently, silicon-on-insulator (SOI) fan-shaped Bragg mirrors with length of about 4 µm have been fabricated [7,8], but their reflectivity is not adjustable. Although a compact fan-shaped Bragg reflector with tunable reflectivity has been proposed in 2005 [9], its reflectivity is very small and there is a mode 3 Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Design and theoretical demonstration of an on-chip metal Bragg grating switch based on two-beam interference

2020

J. Phys. D: Appl. Phys.

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We propose a slot waveguide metal Bragg grating, which can continuously convert the phase difference between two beams of light into their varying reflectivity and transmittivity. Two types of switches based on two-beam interference were designed by optimizing the geometric parameters of metal gratings. Thanks to the localized surface plasmon resonance and the strong optical confinement in slot, both types of switches are very compact. The finite element method simulation result shows the grating’s good performance to controlling light reflection and transmission, especially for Type II switches. The on-state reflectivity and off-state transmittivity of Type II switches are more than 75% and 88% respectively, with both the reflection and transmission switching depths more than 93%, in a 120 nm wide wavelength range centered at 1550 nm. Moreover, slot waveguide metal Bragg gratings combined with phase modulators can be used as reflectivity-adjustable reflectors, which are expected to be promising elements for on-chip laser Q-switching. The proposed slot waveguide metal Bragg grating is expected to be used for photonic integrated circuits and applications which require broadband and high-efficiency on-chip optical switching and adjustable reflections.

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“…Recently, novel types of high-reflectivity HCG mirrors have been proposed and have become a promising alternative to distributed Bragg reflection dielectric stacks for broadband, high-reflectivity filtering applications. 2,[5][6][7] Similarly, much research shows that by designing grating parameters, HCGs can be made into highly specific performance mirrors or lenses, 2,[8][9][10][11][12][13] polarizers, 14,15) and beam splitters 16) among others. In general, owing to its novel excellent capability to control beams, HCGs has become a new kind of hot topic in optical communication systems.…”

Section: Introductionmentioning

confidence: 99%

A two-thickness subwavelength grating focusing lens for TE polarization light

Li¹,

Zhang²,

Huang³

et al. 2018

Jpn. J. Appl. Phys.

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A focusing lens for TE-polarization light based on silicon high-contrast subwavelength gratings (HCGs) with two different thicknesses is proposed. The key point in designing this structure is to obtain a total phase shift of 2π rad continuously by changing the period, duty cycle, and thickness of each grating bar simultaneously for TE polarization light. Meanwhile, a novel two-thickness method is presented to provide more suitable grating bars for the design of HCGs. The properties are numerically studied by the finite element method (FEM). The results show that the focal length is 7.2 µm, the total transmissivity is 72%, and the full-width at half-maximum (FWHM) at the focal plane is 0.8 µm at a wavelength of 1.55 µm. This structure will be potentially integrated into optical devices, such as vertical cavity surface emitting lasers (VCSELs), photodetectors, CCDs, and CMOSs. We also estimate the two-thickness method to be a trade-off between high performances and fabricating accuracy. This lens as an example provides guides for the design of one-dimensional (1D) HCGs and provides suggestions for the design of 2D or 3D HCGs.

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High contrast circular grating reflector on silicon-on-insulator platform

Cited by 15 publications

References 18 publications

Guidelines for designing 2D and 3D plasmonic stub resonators

Guidelines for designing 2D and 3D plasmonic stub resonators

Design and theoretical demonstration of an on-chip metal Bragg grating switch based on two-beam interference

A two-thickness subwavelength grating focusing lens for TE polarization light

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