Control of the harmonic near-field distributions by an active metasurface loaded with pin diodes

Jin Yang; Jun Chen Ke; Mao Chen; Ming Zheng Chen; Jun Yan Dai; Jian Feng Chen; Rui Yang; Jun Wei Wu; Qiang Cheng; Tie Jun Cui

doi:doi:10.1364/PRJ.411661

Photonics Research, 2021, 9 (3): 03000344, Published Online: Feb. 24, 2021

Control of the harmonic near-field distributions by an active metasurface loaded with pin diodes

Jin Yang ^1†Jun Chen Ke ^1†Mao Chen ^1†Ming Zheng Chen ¹Jun Yan Dai ¹Jian Feng Chen ¹Rui Yang ¹Jun Wei Wu ¹Qiang Cheng ^1,*Tie Jun Cui ^1,2

Author Affiliations

¹ State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China

² e-mail: tjcui@seu.edu.cn

Figures & Tables

Fig. 1. Schematic of the space-time digital coding metasurface, which can independently control the wavefronts of the fundamental and high-order harmonics by adjusting the phase φA, and the time delay t1 of the periodic reflectivity.

下载图片查看原文

Fig. 2. Reflection amplitudes and phases of Γpq(t) in each period (left column) and the calculated reflection spectra (right column) under different combinations of φA and t1, when the coding sequence 000011111111 is employed. (a) φA=0°, t1=0, (b) φA=180°, t1=0, (c) φA=0°, t1=T/2.

下载图片查看原文

Fig. 3. (a) Perspective view, (b) top view, and (c) bottom view of the metaatom. (d) The simulated reflection spectra of the metaatom under the normal incidence. (e) The scattering patterns of the metaatom for the on and off states. The geometric parameters of the metaatom are p=14, h1=0.8, h2=4, d0=0.7, x1=2, y1=4, x2=0.4, y2=0.6, x3=0.15, and x4=0.8 mm.

下载图片查看原文

Fig. 4. (a) Required phase distributions of the different harmonics. (b) The corresponding far-field scattering patterns. (c), (d) Near-field amplitude and phase distributions for the −1st, 0th, and 1st order harmonics.

下载图片查看原文

Fig. 5. (a) Front view and (b) back view of the proposed space-time digital coding metasurface. (c) Measured reflection spectra for the on and off states of the PIN diodes. (d) Measured harmonic amplitude distributions under two coding sequences 111100000000 and 000011111111, respectively.

下载图片查看原文

Fig. 6. (a) Schematic of the experimental setup for measuring the harmonic near-field distributions. (b) Photograph of the nonlinear near-field experiment environment. (c) The coaxial probe for near-field detection. (d) The waveguide antenna as the excitation of the metasurface. (e), (f) Measured amplitude and phase distributions of the fundamental and ±1st order harmonics.

下载图片查看原文

Table1. Combination Values ( $ω_{0} t_{1}$ , $φ_{A}$ ) and Calculated Harmonic Phases in the Eight Zones of the Metasurface

Region Number	$φ_{A}$ (deg)	$ω_{0} t_{1}$ (deg)	−1st (deg)	0th (deg)	1st (deg)
$1^{#}$	0	315	15	180	−15
$2^{#}$	0	270	–30	180	30
$3^{#}$	0	225	−75	180	75
$4^{#}$	0	180	−120	180	120
$5^{#}$	180	315	−165	0	165
$6^{#}$	180	270	150	0	−150
$7^{#}$	180	225	105	0	−105
$8^{#}$	180	180	60	0	−60

查看原文

Jin Yang, Jun Chen Ke, Mao Chen, Ming Zheng Chen, Jun Yan Dai, Jian Feng Chen, Rui Yang, Jun Wei Wu, Qiang Cheng, Tie Jun Cui. Control of the harmonic near-field distributions by an active metasurface loaded with pin diodes[J]. Photonics Research, 2021, 9(3): 03000344.

Control of the harmonic near-field distributions by an active metasurface loaded with pin diodes

Fig. 1. Schematic of the space-time digital coding metasurface, which can independently control the wavefronts of the fundamental and high-order harmonics by adjusting the phase φA, and the time delay t1 of the periodic reflectivity.

Fig. 2. Reflection amplitudes and phases of Γpq(t) in each period (left column) and the calculated reflection spectra (right column) under different combinations of φA and t1, when the coding sequence 000011111111 is employed. (a) φA=0°, t1=0, (b) φA=180°, t1=0, (c) φA=0°, t1=T/2.

Fig. 4. (a) Required phase distributions of the different harmonics. (b) The corresponding far-field scattering patterns. (c), (d) Near-field amplitude and phase distributions for the −1st, 0th, and 1st order harmonics.

Fig. 5. (a) Front view and (b) back view of the proposed space-time digital coding metasurface. (c) Measured reflection spectra for the on and off states of the PIN diodes. (d) Measured harmonic amplitude distributions under two coding sequences 111100000000 and 000011111111, respectively.

Table1. Combination Values ( $ω_{0} t_{1}$ , $φ_{A}$ ) and Calculated Harmonic Phases in the Eight Zones of the Metasurface

关于本站 Cookie 的使用提示

全站搜索

Control of the harmonic near-field distributions by an active metasurface loaded with pin diodes

Fig. 1. Schematic of the space-time digital coding metasurface, which can independently control the wavefronts of the fundamental and high-order harmonics by adjusting the phase φA, and the time delay t1 of the periodic reflectivity.

Fig. 2. Reflection amplitudes and phases of Γpq(t) in each period (left column) and the calculated reflection spectra (right column) under different combinations of φA and t1, when the coding sequence 000011111111 is employed. (a) φA=0°, t1=0, (b) φA=180°, t1=0, (c) φA=0°, t1=T/2.

Fig. 4. (a) Required phase distributions of the different harmonics. (b) The corresponding far-field scattering patterns. (c), (d) Near-field amplitude and phase distributions for the −1st, 0th, and 1st order harmonics.

Fig. 5. (a) Front view and (b) back view of the proposed space-time digital coding metasurface. (c) Measured reflection spectra for the on and off states of the PIN diodes. (d) Measured harmonic amplitude distributions under two coding sequences 111100000000 and 000011111111, respectively.

Table1. Combination Values (ω0t1, φA) and Calculated Harmonic Phases in the Eight Zones of the Metasurface

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索

Table1. Combination Values ( $ω_{0} t_{1}$ , $φ_{A}$ ) and Calculated Harmonic Phases in the Eight Zones of the Metasurface