Compact and highly-efficient broadband surface grating antenna on a silicon platform.
Shahrzad Khajavi,Daniele Melati,Pavel Cheben,Jens H. Schmid,Qiankun Liu,Dan-Xia Xu,Winnie N. Ye +6 more
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TLDR
In this article, a surface grating antenna design with high diffraction efficiency of 89% (-0.5 dB) and directionality of 0.94 is presented. But the antenna is designed with subwavelength-based L-shaped radiating elements in a 300-nm silicon core, maintaining high efficiency with a compact footprint of 7.6 µm × 4.5 µm.Abstract:
We present a compact silicon-based surface grating antenna design with a high diffraction efficiency of 89% (-0.5 dB) and directionality of 0.94. The antenna is designed with subwavelength-based L-shaped radiating elements in a 300-nm silicon core, maintaining high efficiency with a compact footprint of 7.6 µm × 4.5 µm. The reflectivity remains below -10 dB over the S, C and L optical communication bands. A broad 1-dB bandwidth of 230 nm in diffraction efficiency is achieved with a central wavelength of 1550 nm.read more
Citations
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A large-scale microelectromechanical-systems-based silicon photonics LiDAR
TL;DR: In this article , a 16,384-pixel LiDAR with a wide field of view (FoV, 70° × 70°), a narrow beam divergence (0.050° × 0.049°), and a random access beam addressing with sub-MHz operation speed is reported.
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A review of silicon subwavelength gratings: building break-through devices with anisotropic metamaterials
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High-efficiency unidirectional vertical emitter achieved by an aperture-coupling nanoslot antenna array.
TL;DR: A compact aperture-coupling nanoslot antenna array is proposed for high-efficiency unidirectional radiation, where a two-dimensional high-contrast grating is employed as a mirror to reflect the undesired downward radiation.
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Circular Optical Phased Arrays with Radial Nano-Antennas
TL;DR: In this paper , the authors provide numerical analysis for 2D circular OPAs with radially arranged nano-antennas and propose the use of a central circular grating coupler to feed the designed circular OPA, which can yield an aliasing-free azimuthal field of view (FOV) of 360°.
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Highly efficient ultra-broad beam silicon nanophotonic antenna based on near-field phase engineering
Shahrzad Khajavi,Daniele Melati,Pavel Cheben,Jens H. Schmid,Carlos Alonso-Ramos,Winnie N. Ye +5 more
TL;DR: In this article , a nanophotonic antenna based on near-field phase engineering is proposed to achieve high radiation efficiency, ultra-compact footprint and broad radiation angle simultaneously.
References
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Large-scale nanophotonic phased array
TL;DR: This work demonstrates that a robust design, together with state-of-the-art complementary metal-oxide–semiconductor technology, allows large-scale NPAs to be implemented on compact and inexpensive nanophotonic chips and therefore extends the functionalities of phased arrays beyond conventional beam focusing and steering, opening up possibilities for large- scale deployment.
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Compact efficient broadband grating coupler for silicon-on-insulator waveguides.
TL;DR: A high-efficiency broadband grating coupler for coupling between silicon-on-insulator (SOI) waveguides and optical fibers and the size of the grooves is optimized numerically.
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Subwavelength integrated photonics.
TL;DR: How optical metamaterials are expected to enhance the performance of the next generation of integrated photonic devices is reviewed, and some of the challenges encountered in the transition from concept demonstration to viable technology are explored.
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High-efficiency fiber-to-chip grating couplers realized using an advanced CMOS-compatible Silicon-On-Insulator platform
Diedrik Vermeulen,Shankar Kumar Selvaraja,Peter Verheyen,Guy Lepage,Wim Bogaerts,Philippe Absil,D. Van Thourhout,Gunther Roelkens +7 more
TL;DR: A new generation of Silicon-on-Insulator fiber-to-chip grating couplers which use a silicon overlay to enhance the directionality and thereby the coupling efficiency is presented.
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Subwavelength grating periodic structures in silicon-on-insulator: a new type of microphotonic waveguide.
Przemek J. Bock,Pavel Cheben,Jens H. Schmid,Jean Lapointe,André Delâge,Siegfried Janz,Geof C. Aers,Dan-Xia Xu,Adam Densmore,Trevor J. Hall +9 more
TL;DR: Experimental measurements indicate a propagation loss as low as 2.1 dB/cm for subwavelength grating waveguide with negligible polarization and wavelength dependent loss, which compares favourably to conventional microphotonic silicon waveguides.