Interdigitated-Slot Photoconductive Antenna for Terahertz Applications

Rathinasamy, Vaisshale; Kapoor, Shriya; Rout, Akhil; Rao, T. Rama; Mondal, Shyamal

doi:10.1109/incap47789.2019.9134614

Cited by 6 publications

(3 citation statements)

References 15 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%

“…The planar silver electrode of a 1 μm thickness is placed on the substrate. The periodic metallic structures are placed at the edges of the anode and cathode with a gap of 1 μm, teeth width of W e =8μmanda teethlengthofL e =20μm.Theseslotsintheelectrodesimprovethefieldintensityand spectrum bandwidth for strong THz radiation [37]. By varying the geometry of interdigitated finger and slots, the performance of IPCA gets improved.…”

Section: Slotted Ipcamentioning

confidence: 99%

“…The center slot IPCA performs a 0.515 THz bandwidth and 0.613 and 3.013 dB gain respectively at 4 and 5 THz. It performs high-intensity THz wave generation [37]. The tip-to-tip IPCA shown in Figure 1c has the electricfield of about 4:5 Â 10 6 V=m.…”

Section: Numerical Modeling Of Ipcamentioning

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: Slotted Ipcamentioning

confidence: 99%