Inverse design optimization for efficient coupling of an electrically injected optical antenna-LED to a single-mode waveguide

Andrade, Nicolas M.; Hooten, Sean; Fortuna, Seth A.; Han, Kevin; Yablonovitch, Eli; Wu, M.C.

doi:10.1364/oe.27.019802

Cited by 22 publications

(11 citation statements)

References 26 publications

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“…A. Directional waveguide Electromagnetic waveguides are fairly common in inverse design devices either as the primary function or as important building blocks to more complicated devices [6,19]. Presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Inverse design methodology is an algorithmic technique by which optimal solutions are iteratively approximated from an a priori set of performance metrics. When applied to electromagnetically-active systems [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], devices are built by designating a design region wherein various numerical methods are used to solve Maxwell's equations for a given distribution of sources and material domain. The constitutive properties (e.g., relative permittivity or permeability) of the design region are then mapped to trainable parameters which are modified to mold the propagation of source fields through the designated region in a manner that fulfills the user's performance criteria.…”

Section: Introductionmentioning

confidence: 99%

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Inverse design of plasma metamaterial devices with realistic elements

Rodriguez¹,

Cappelli²

2022

Preprint

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In an expansion of a previous study [1], we apply inverse design methods to produce twodimensional plasma metamaterial devices with realistic plasma elements which incorporate quartz envelopes, collisionality (loss), non-uniform density profiles, and resistance to experimental error/perturbation. Backpropagated finite difference frequency domain simulations are used to design waveguides and demultiplexers operating under the transverse magnetic polarization. Optimal devices with realistic elements are compared to previous devices with idealized elements, and several parameter initialization schemes for the optimization algorithm are explored. Demultiplexing and waveguiding are demonstrated for microwave-regime devices composed of plasma elements with reasonable space-averaged plasma frequencies ∼ 10 GHz and a collision frequency ∼ 1 GHz, allowing for future in-situ training and experimental realization of these designs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inverse design of plasma metamaterial devices with realistic elements

Rodriguez¹,

Cappelli²

2022

Preprint

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

“…Inverse design methodology is an algorithmic technique by which optimal solutions are iteratively approximated from an a priori set of performance metrics. When applied to electromagnetically-active systems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], devices are built by designating a design region wherein various numerical methods are used to solve Maxwell's equations for a given distribution of sources and material domain. The constitutive properties (e.g., relative permittivity or permeability) of the design region are then mapped to trainable parameters which are modified to mold the propagation of source fields through the designated region in a manner that fulfills the user's performance criteria.…”

Section: Introductionmentioning

confidence: 99%

Inverse design of plasma metamaterial devices for optical computing

Rodriguez,

Abdalla,

Wang

et al. 2021

Preprint

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We apply inverse design methods to produce two-dimensional plasma metamaterial (PMM) devices. Backpropagated finite difference frequency domain (FDFD) simulations are used to design waveguides and demultiplexers operating under both transverse electric (TE) and transverse magnetic (TM) modes. Multiplexing and waveguiding are demonstrated for devices composed of plasma elements with reasonable plasma densities ∼ 7 GHz, allowing for future in-situ training and experimental realization of these designs. We also explore the possible applicability of PMMs to nonlinear boolean operations for use in optical computing. Functionally complete logical connectives (NOR and NAND) are achieved in the TM mode.

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“…Figure 5(a) & (b) show the best performance achieved by optimizing an antenna with a narrow FOV in one dimension in such a single-layer photonic process, which leads to 60% upward radiated power. To improve the radiation efficiency in this setting (with the maximum silicon slab thickness of 220 nm), structures with accentuated asymmetry such as twolayer grating couplers [26], [27] should be devised. The above derivation for a long antenna structure results in a one-dimensional FOV antenna assuming all the power being radiated upward or downward.…”

Section: Fabrication Imposed Limitationsmentioning

confidence: 99%

Breaking FOV-Aperture Trade-Off With Multi-Mode Nano-Photonic Antennas

Fatemi

Khial

Khachaturian

et al. 2021

IEEE J. Select. Topics Quantum Electron.

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Nano-photonic antennas are one of the key components in integrated photonic transmitter and receiver systems. Conventionally, grating couplers, designed to couple into an optical fiber, suffering from limitations such as large footprint and small field-of-view (FOV) have been used as on-chip antennas. The challenge of the antenna design is more pronounced for the receiver systems, where both the collected power by the antenna and its FOV often need to be maximized. While some novel solutions have been demonstrated recently, identifying fundamental limits and trade-offs in nano-photonic antenna design is essential for devising compact antenna structures with improved performance. In this paper, the fundamental electromagnetic limits, as well as fabrication imposed constraints on improving antenna effective aperture and FOV are studied, and approximated performance upper limits are derived and quantified. By deviating from the conventional assumptions leading to these limits, high-performance multi-mode antenna structures with performance characteristics beyond the conventional perceived limits are demonstrated. Finally, the application of a pillar multimode antenna in a dense array is discussed, an antenna array with more than 95% collection efficiency and 170°FOV is demonstrated, and a coherent receiving system utilizing such an aperture is presented.

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Inverse design optimization for efficient coupling of an electrically injected optical antenna-LED to a single-mode waveguide

Cited by 22 publications

References 26 publications

Inverse design of plasma metamaterial devices with realistic elements

Inverse design of plasma metamaterial devices with realistic elements

Inverse design of plasma metamaterial devices for optical computing

Breaking FOV-Aperture Trade-Off With Multi-Mode Nano-Photonic Antennas

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