Interdigitated Photoconductive Antenna Design and Analysis for Terahertz Wireless Applications

Mondal, Shyamal; Rathinasamy, Vaisshale; Kapoor, Shriya; Mukherjee, Shankar; Rao, T. Rama

doi:10.1109/5gwf49715.2020.9221445

Cited by 7 publications

(5 citation statements)

References 23 publications

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“…The optical to terahertz conversion efficiency of conventional PCA (dipole PCA) is very low (0.00075%) [36]. With interdigitated structures reported in [20,[37][38][39], the optical to terahertz conversion efficiency has been improved from 0.000614 to 0.0678% by increasing the number of interdigitated teeth from 2 elements to 40 elements. These interdigitated PCA structures can also be included in the bow-tie and dipole PCA gap area.…”

Section: Interdigitated Pcasmentioning

confidence: 99%

“…As the gap between the PCA electrodes is filled by the metal teeth-like structures, most of the generated photocarriers get collected at the respective electrodes with less carrier drift time and leads to the uniform electric field. The addition of slots, the number of teeth-like electrodes and teeth width dimension have been varied to study the further improvement on IPCA based THz pulse generation [20]. The IPCA with slots helps to shift the resonant frequency toward higher THz frequencies.…”

Section: Introductionmentioning

confidence: 99%

“…The center-slot realizes the maximum peak intensity of about 38.59 W cm À2 .Iftwo parallel slots are added, the peak intensity is reduced to 27.20 W cm À2 . If the slots are added around the center, the peak intensity reduces to 26.44 W cm À2[20]. This geometry generates high THz radiated power by optimizing the length and width of…”

mentioning

confidence: 99%

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Interdigitated Photoconductive Antenna for Efficient Terahertz Generation and Detection

Mondal¹,

Edwin²,

Rathinasamy³

2022

Terahertz Technology

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THz signals can be generated commonly from Photoconductive Antenna (PCA) but the efficiency is low for the conventional PCA. This work improves the optical to terahertz conversion efficiency of the terahertz radiation by changing the conventional PCA structure to Interdigitated PCA (IPCA). The efficiency of PCA is dependent on the current pulse generated in the antenna structure when the laser pulse is incident on it. This paper targets to achieve high photo-current, as well as THz electric field from the IPCAs which are simulated using FEM and FDTD techniques. Also, the effect of various parameters such as current, gain, frequency bandwidth, optical to terahertz conversion efficiency, etc. are studied to study the importance of IPCAs.

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Section: Interdigitated Pcasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interdigitated Photoconductive Antenna for Efficient Terahertz Generation and Detection

Mondal¹,

Edwin²,

Rathinasamy³

2022

Terahertz Technology

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“…The IPCA operation is a combination of three different domains, (a) semiconductor domain, (b) optical domain, and (c) microwave domain. 23 The conventional PCA (Dipole, Bow-tie) has two electrodes and there is a large gap between the electrodes in the active area whereas the proposed IPCA has IDEs in the active area for efficient THz generation. By illuminating the ultrashort femtosecond laser pulse on the active area of the photoconductive substrate material between the anode and the cathode, the electron-hole pairs are generated.…”

Section: Modeling Of Thz Ipcamentioning

confidence: 99%

“…The IPCA operation is a combination of three different domains, (a) semiconductor domain, (b) optical domain, and (c) microwave domain 23 . The conventional PCA (Dipole, Bow‐tie) has two electrodes and there is a large gap between the electrodes in the active area whereas the proposed IPCA has IDEs in the active area for efficient THz generation.…”

Section: Modeling Of Thz Ipcamentioning

confidence: 99%

Interdigitated photoconductive terahertz antenna for future wireless communications

Rathinasamy

Rao

Edwin

et al. 2021

Micro & Optical Tech Letters

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Recently, the technology buzz on utilization of terahertz (THz) technology in beyond 5G and 6G communication is growing due to the demands for large network capacity, bandwidth, and ultrahigh data rates. The THz frequencies are prudent for short-range future wireless communication systems as they provide extraordinary channel capacity with data rates from few Gb/s to Tb/s due to its ultra-wide spectrum bandwidth. However, there exists many challenges in designing devices that operate under THz frequencies. The photo-conductive antenna (PCA) is one of the crucial components that support realization of ultrafast wireless THz communications. In this paper, investigations on photoconductive antennas with interdigitated electrodes (IDEs) have been presented for THz communications with an equivalent circuit model for IPCA with corresponding solved expressions. The results show that the maximum THz field strength of 4.41 Â 10 5 V/m is achievable by a 10 μm interdigitated teeth length IPCA with larger spectrum bandwidth of about ~8 THz. The antenna module makes the possibility of miniaturization of the THz sources and detectors for the emerging variety of wireless THz applications.

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Numerical investigation and circuit analysis of interdigitated photoconductive antenna for terahertz applications

et al. 2022

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Interdigitated Photoconductive Antenna Design and Analysis for Terahertz Wireless Applications

Cited by 7 publications

References 23 publications

Interdigitated Photoconductive Antenna for Efficient Terahertz Generation and Detection

Interdigitated Photoconductive Antenna for Efficient Terahertz Generation and Detection

Interdigitated photoconductive terahertz antenna for future wireless communications

Numerical investigation and circuit analysis of interdigitated photoconductive antenna for terahertz applications

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