Design of beam shaping and focusing metasurface device based on G-S algorithm

Sun, Yuhui; He, Dawei; Liu, Yan; Lin, Cuiping; Yuan, Weiqing; She, Ying

doi:10.1016/j.optmat.2020.110247

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…Thus, making it suitable for variety of applications. They have been widely studied in the field of optics and have been used to create a wide range of functional devices such as waveplates [1][2][3], polarizers [4][5][6][7][8], and beam shapers [9][10][11][12][13]. One of the key advantages of metasurfaces is that they can be used to create highly compact and lightweight devices that can be integrated into a wide range of systems.…”

Section: Intorductionmentioning

confidence: 99%

Low profile high gain RHCP antenna for L-Band and S-Band using rectangular ring metasurface with backlobe suppression

Khan,

Mairaj Rasool Khan

2024

PLoS ONE

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In this reported work a single feed, miniaturized, dual layer, and low profile antenna is presented for 1.575GHz frequency band. The proposed antenna offers high gain, lower noise bandwidth, with better sensitivity and range. The ground choke technique is used for back lobe suppression. The prototype is fabricated on FR 4 substrate using manual fabrication technique. This offers an inexpensive and readily available fabrication. Therefore, fabricated antenna is small size, low cost, easily fabricated and tested for satellite communication. The antenna comprises of two layers, containing a patch radiator and a Metasurface layer with 3x3 rectangular ring resonators. The layers are separated using foam with a 12mm width. The proposed prototype is radiating at 1.575GHz and 2.33GHz with an overall dimension of 85.6 x 68.4 x 15.204 mm. The developed antenna provides a gain of 5.9 dBi. The simulated results are verified using VNA and anechoic chamber testing. Moreover, the developed antenna has been successfully tested for L-Band Satellite communication in real time scenario without any LNA. Higher Gain due to Metasurface increase the efficiency of the system. The promising results indicate the aptness of the developed antenna for real-world applications of L-Band and S-Band.

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Section: Intorductionmentioning

confidence: 99%

Low profile high gain RHCP antenna for L-Band and S-Band using rectangular ring metasurface with backlobe suppression

Khan,

Mairaj Rasool Khan

2024

PLoS ONE

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Design of a compact off-axis two-mirror freeform optical antenna for shaping and transmitting an elliptical beam emitted by laser diode

Chen,

Hu,

Liu

et al. 2023

Appl. Opt.

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Elliptical Gaussian beams generated by laser diodes (LDs) often exhibit asymmetrical divergence angle distribution, which limits their practical applications. In this study, we propose what we believe is a novel approach to shape and collimate the elliptical output beam from a LD. The design process involves the construction of two freeform reflective surfaces on a reference circle using a three-dimensional point-by-point iterative method, based on the law of conservation of energy, the vector reflection theory, and Fermat’s principle. The output beam’s maximum divergence angle is effectively compressed to 3.1579 mrad. The design is compact with a folded optical path and antenna size of 368.8cm3. This paper presents a comprehensive design and optimization process, along with an in-depth analysis of the system’s performance, thereby offering novel insights for emerging optical design practitioners.

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Randomized metalens array homogenizer for enhanced laser beam shaping

Ding,

Zhu,

Xiao

et al. 2024

Opt. Express

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We present a beam homogenizer utilizing on a random metalens array (RMA) for enhanced beam shaping. The RMA, comprising 28 × 28 individual metalenses with random sizes, is designed using an improved Gerchberg-Saxton algorithm. As a laser beam traverses the RMA, it is divided into 28 × 28 beams, each exhibiting a unique speckle pattern. These beams overlap in the far field, significantly enhancing beam uniformity. The RMA demonstrates adaptability to various incident light modes and misalignment variations. The numerical simulations indicate over 90% uniformity in the shaped beams, while in experimental results show a reshaped line beam achieving 95.9% uniformity. This beam homogenizer has potential applications in minimizing the size of LiDAR systems or laser engraving systems, offering broader utility across these fields.

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Design of beam shaping and focusing metasurface device based on G-S algorithm

Cited by 4 publications

References 29 publications

Low profile high gain RHCP antenna for L-Band and S-Band using rectangular ring metasurface with backlobe suppression

Low profile high gain RHCP antenna for L-Band and S-Band using rectangular ring metasurface with backlobe suppression

Design of a compact off-axis two-mirror freeform optical antenna for shaping and transmitting an elliptical beam emitted by laser diode

Randomized metalens array homogenizer for enhanced laser beam shaping

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