High-volume rapid prototyping technique for terahertz metallic metasurfaces

Guerboukha, Hichem; Amarasinghe, Yasith; Shrestha, Rabi; Pizzuto, Angela; Mittleman, Daniel M.

doi:10.1364/oe.422991

Cited by 34 publications

(7 citation statements)

References 42 publications

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“…Because of their high conductivity and low loss, conductive inks including copper, graphene, and others, are widely employed to transfer the pattern upon the flexible plastic substrate. The main PE-based fabrication technologies are flexography printing, hotstamping, screen-printing, and ink-jet printing [32,33]. Despite the relatively low resolution of the printed pattern, which is in the order of a few tens of microns, printing THz devices with features on the order of the wavelength size remains adequate.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable screen-printed terahertz frequency selective surface based on metallic checkerboard pattern

Ahmad,

Ropagnol,

Trinh

et al. 2024

Flex. Print. Electron.

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We employed the screen-printing method to fabricate terahertz (THz) frequency selective surfaces (FSS) featuring an inductive metallic checkerboard (i-MCB) pattern based on silver nanoparticles ink onto a flexible polyethylene terephthalate (PET) substrate. Analytical studies, along with simulations and experiments, were conducted to investigate the filtering characteristics of the printed FSSs, confirming their functionality as a band-pass filter. Subsequently, we demonstrated the reconfigurability of a two-layer system by vertically stacking two layers. This was achieved by systematically shifting the position of the second layer in the x or y-direction relative to the first layer. Experimental verification revealed a significant variation in normalized transmission, ranging from 94% to 6% at 0.15 THz for type-I:i-MCBs and 90% to 5% at 0.20 THz for type-II:i-MCBs, respectively. This study presents a simple scheme for a reconfigurable screen-printed i-MCB-FSS operating in the THz range. Consequently, our findings demonstrate that screen printing method can effectively be employed for the large-scale production of THz FSSs.

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Section: Introductionmentioning

confidence: 99%

Reconfigurable screen-printed terahertz frequency selective surface based on metallic checkerboard pattern

Ahmad,

Ropagnol,

Trinh

et al. 2024

Flex. Print. Electron.

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show abstract

“…Most reported FSS are made on rigid, flat, smooth surfaces, for example, metal patterning on glass [17,18] and rigid polymers [19], and direct patterned etching of printed circuit board (PCB) laminates [14,20]. In recent years, printing techniques such as screen printing [20], inkjet printing [20][21][22], lithographic techniques [20,21,23] and hot stamping [24] have all been used to print FSS on flexible yet smooth surfaces such as paper [25], special foil [24], plastic [22] or textile [20,26]. However, many of these demonstrated techniques requires a screen, stencil, stamp or chemicals for pattering.…”

Section: Introductionmentioning

confidence: 99%

Implementation of a second‐order frequency selective surface filter at mmWave using paper and silver ink

Kokkonen

Dessai

Myllymäki

2023

The Journal of Engineering

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In this work, fabrication of frequency selective surface filters by coating paper with silver ink and subsequent laser etching the frequency filter pattern has been investigated. Three filter structures consisting of a combination of square and ring patches operating at 102, 113, and 126 GHz and with corresponding signal attenuation of −15.2, −15.4, and −14.5 dB were fabricated and simulated; −5 dB bandwidths were following, , respectively. Also, the proposed screen printing with assistive laser etching could be used to reduce the number of used screens. Furthermore, paper based fabrication using a biodegradable ink could be an alternative fabrication process in future electronic manufacturing.

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“…The research of terahertz (THz) technologies provides fascinating paths for imaging [1][2][3][4][5] , biomedicine [6][7][8] , optical frequency combs [9,10] , communication [11,12] , and security diagnosis [1,13,14] . Thus, researches on strong and broadband THz emitters have earned considerable attentions [15] .…”

Section: Introductionmentioning

confidence: 99%

Spintronic terahertz emitter with integrated electromagnetic control

et al. 2022

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Spintronic thin films are considered as one of the promising terahertz (THz) source candidates, owing to their high performance and low cost. Much effort has been made to achieve spintronic THz sources with broadband and high conversion efficiency. However, the development of spintronic THz emitters with good compatibility, low cost, and miniaturized technology still faces many challenges. Therefore, it is urgent to extend commercial and portable spintronic THz emitters to satisfy many practical applications. Herein, we design a new generation of spintronic THz emitters composed of an alternating electromagnet and a miniaturized electronic controller. Not only can this new type of spintronic THz emitter largely simplify the ancillary equipment for spintronic sources, it also has a twice larger THz signal compared to the traditional THz time-domain spectroscopy systems with a mechanical chopper. Experimental results and theoretical calculations for electromagnetic coils show that our design can stably generate THz signals that are independent of the frequency and magnetic field of alternating signals. As the spin thin film is optimized, a magnetic field as low as 75 G satisfies the requirement for high performance THz emission. Hence, not only is the efficiency of the pump power enhanced, but also the driving current in the electromagnet is decreased. We believe that it has a wide range of applications and profound implications in THz technology based on spintronic emitters in the future.

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High-volume rapid prototyping technique for terahertz metallic metasurfaces

Cited by 34 publications

References 42 publications

Reconfigurable screen-printed terahertz frequency selective surface based on metallic checkerboard pattern

Reconfigurable screen-printed terahertz frequency selective surface based on metallic checkerboard pattern

Implementation of a second‐order frequency selective surface filter at mmWave using paper and silver ink

Spintronic terahertz emitter with integrated electromagnetic control

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