Terahertz radiation enhancement in dipole photoconductive antenna on LT-GaAs using a gold plasmonic nanodisk array

Mohammad Bashirpour; Jafar Poursafar; Mohammadreza Kolahdouz; Mohsen Hajari; Matin Forouzmehr; Mohammad Neshat; Hamid Hajihoseini; Morteza Fathipour; Zahra Kolahdouz; Guoqi Zhang

doi:10.1016/j.optlastec.2019.105726

Terahertz radiation enhancement in dipole photoconductive antenna on LT-GaAs using a gold plasmonic nanodisk array

Mohammad Bashirpour, Jafar Poursafar, Mohammadreza Kolahdouz^*, Mohsen Hajari, Matin Forouzmehr, Mohammad Neshat, Hamid Hajihoseini, Morteza Fathipour, Zahra Kolahdouz, Guoqi Zhang

^*Corresponding author for this work

Electronic Components, Technology and Materials

Research output: Contribution to journal › Article › Scientific › peer-review

22 Citations (Scopus)

Abstract

This study proposes a new-fashioned plasmonic photoconductive antenna (PCA) with high optical-to-terahertz (THz) conversion efficiency. Finite element method was used to investigate and optimize the interaction of 800 nm femtosecond laser with the designed nanodisk array in the antenna's gap using its geometrical parameters. According to the simulation results, our optimized nanoplasmonic structure showed more than 38% enhancement in the absorption efficiency compared to the conventional structure without any nanostructure. Measuring the THz radiation of the fabricated PCAs using a time domain spectroscopy setup exhibited an exceptional 5.6 times higher electric field in 0.1–2.5 THz range compared to a similar PCA but without nanoplasmonic structure.

Original language	English
Article number	105726
Pages (from-to)	1-6
Number of pages	6
Journal	Optics and Laser Technology
Volume	120
DOIs	https://doi.org/10.1016/j.optlastec.2019.105726
Publication status	Published - 2019

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10.1016/j.optlastec.2019.105726

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Bashirpour, M., Poursafar, J., Kolahdouz, M., Hajari, M., Forouzmehr, M., Neshat, M., Hajihoseini, H., Fathipour, M., Kolahdouz, Z., & Zhang, G. (2019). Terahertz radiation enhancement in dipole photoconductive antenna on LT-GaAs using a gold plasmonic nanodisk array. Optics and Laser Technology, 120, 1-6. Article 105726. https://doi.org/10.1016/j.optlastec.2019.105726

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abstract = "This study proposes a new-fashioned plasmonic photoconductive antenna (PCA) with high optical-to-terahertz (THz) conversion efficiency. Finite element method was used to investigate and optimize the interaction of 800 nm femtosecond laser with the designed nanodisk array in the antenna's gap using its geometrical parameters. According to the simulation results, our optimized nanoplasmonic structure showed more than 38% enhancement in the absorption efficiency compared to the conventional structure without any nanostructure. Measuring the THz radiation of the fabricated PCAs using a time domain spectroscopy setup exhibited an exceptional 5.6 times higher electric field in 0.1–2.5 THz range compared to a similar PCA but without nanoplasmonic structure.",

author = "Mohammad Bashirpour and Jafar Poursafar and Mohammadreza Kolahdouz and Mohsen Hajari and Matin Forouzmehr and Mohammad Neshat and Hamid Hajihoseini and Morteza Fathipour and Zahra Kolahdouz and Guoqi Zhang",

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AU - Bashirpour, Mohammad

AU - Poursafar, Jafar

AU - Kolahdouz, Mohammadreza

AU - Hajari, Mohsen

AU - Forouzmehr, Matin

AU - Neshat, Mohammad

AU - Hajihoseini, Hamid

AU - Fathipour, Morteza

AU - Kolahdouz, Zahra

AU - Zhang, Guoqi

PY - 2019

Y1 - 2019

N2 - This study proposes a new-fashioned plasmonic photoconductive antenna (PCA) with high optical-to-terahertz (THz) conversion efficiency. Finite element method was used to investigate and optimize the interaction of 800 nm femtosecond laser with the designed nanodisk array in the antenna's gap using its geometrical parameters. According to the simulation results, our optimized nanoplasmonic structure showed more than 38% enhancement in the absorption efficiency compared to the conventional structure without any nanostructure. Measuring the THz radiation of the fabricated PCAs using a time domain spectroscopy setup exhibited an exceptional 5.6 times higher electric field in 0.1–2.5 THz range compared to a similar PCA but without nanoplasmonic structure.

AB - This study proposes a new-fashioned plasmonic photoconductive antenna (PCA) with high optical-to-terahertz (THz) conversion efficiency. Finite element method was used to investigate and optimize the interaction of 800 nm femtosecond laser with the designed nanodisk array in the antenna's gap using its geometrical parameters. According to the simulation results, our optimized nanoplasmonic structure showed more than 38% enhancement in the absorption efficiency compared to the conventional structure without any nanostructure. Measuring the THz radiation of the fabricated PCAs using a time domain spectroscopy setup exhibited an exceptional 5.6 times higher electric field in 0.1–2.5 THz range compared to a similar PCA but without nanoplasmonic structure.

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JO - Optics and Laser Technology

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Terahertz radiation enhancement in dipole photoconductive antenna on LT-GaAs using a gold plasmonic nanodisk array

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