Compact wavelength demultiplexing using focusing negative index photonic crystal superprisms

Momeni, Babak; Huang, Jing-Song; Soltani, Mohammad; Askari, Murtaza; Mohammadi, Saeed; Rakhshandehroo, M. R.; Adibi, Ali

doi:10.1364/oe.14.002413

Cited by 132 publications

(71 citation statements)

References 25 publications

(32 reference statements)

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“…5) corresponding to an aspect ratio close to 8. This range of aspect ratio is well-suited for the fabrication of advanced optical components like photonic crystal structures, upon further downscaling [15,16].…”

Section: Resultsmentioning

confidence: 99%

Front-surface fabrication of moderate aspect ratio micro-channels in fused silica by single picosecond Gaussian–Bessel laser pulse

et al. 2018

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Single-shot Gaussian-Bessel laser beams of 1 ps pulse duration and of ~ 0.9 μm core size and ~ 60 μm depth of focus are used for drilling micro-channels on front side of fused silica in ambient condition. Channels ablated at different pulse energies are fully characterized by AFM and post-processing polishing procedures. We identify experimental energy conditions (typically 1.5 µJ) suitable to fabricate non-tapered channels with mean diameter of ~ 1.2 µm and length of ~ 40 μm while maintaining an utmost quality of the front opening of the channels. In addition, by further applying accurate post-polishing procedure, channels with high surface quality and moderate aspect ratio down to a few units are accessible, which would find interest in the surface micro-structuring of materials, with perspective of further scalability to meta-material specifications.

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Section: Resultsmentioning

confidence: 99%

Front-surface fabrication of moderate aspect ratio micro-channels in fused silica by single picosecond Gaussian–Bessel laser pulse

et al. 2018

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“…The preferred light source is usually (but not always) a laser. The case of a spectroscopic laboratory on a chip [5,6] presents an exception to the "rule" of laser. There, a spectrally broad source like an on-chip lightemitting diode would be optimum, although a WDM laser array could serve also.…”

Section: The Light-source Challengementioning

confidence: 99%

The Achievements and Challenges of Silicon Photonics

Soref

2008

Advances in Optical Technologies

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A brief overview of silicon photonics is given here in order to provide a context for invited and contributed papers in this special issue. Recent progress on silicon-based photonic components, photonic integrated circuits, and optoelectronic integrated circuits is surveyed. Present and potential applications are identified along with the scientific and engineering challenges that must be met in order to actualize applications. Some on-going government-sponsored projects in silicon optoelectronics are also described.

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“…Moreover, spatially broadening of the propagating beam inside the structure requires large dimensions that render the devices to be less compact. Furthermore, in the superprism-based demultiplexing devices, the incident beam's spatial profile becomes distorted, eventually limiting the coupling efficiency to the output channels [3][4][5][6]. Another powerful approach for WDM purposes is to spatially separate the wavelengths of the input light along a PCW.…”

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confidence: 99%

Numerical and experimental demonstration of a wavelength demultiplexer design by point-defect cavity coupled to a tapered photonic crystal waveguide

et al. 2015

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We propose and experimentally demonstrate a demultiplexer with point-defect resonators and a reflection feedback mechanism in a photonic crystal waveguide (PCW). A tapered PCW has been chosen as the necessary reflector, which enhances the drop efficiency. Due to the variation of the single-mode waveguide width of the tapered PCW, spatial alteration of the effective refractive index can be achieved. This phenomenon is used to reflect back the forward propagating wave which is then coupled again to the drop channels via the resonators. High transmission efficiency to the dropout channels is numerically predicted by calculations, either in two-and three-dimensional models, and analytically described by a coupled-mode theory. Moreover, an experimental realization in the microwave regime provides confirmation that the targeted wavelengths can be properly transmitted at the drop channels with low crosstalk and relatively high efficiencies.

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Compact wavelength demultiplexing using focusing negative index photonic crystal superprisms

Cited by 132 publications

References 25 publications

Front-surface fabrication of moderate aspect ratio micro-channels in fused silica by single picosecond Gaussian–Bessel laser pulse

Front-surface fabrication of moderate aspect ratio micro-channels in fused silica by single picosecond Gaussian–Bessel laser pulse

The Achievements and Challenges of Silicon Photonics

Numerical and experimental demonstration of a wavelength demultiplexer design by point-defect cavity coupled to a tapered photonic crystal waveguide

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