Total Efficiency of the Optical-to-Terahertz Conversion in Photoconductive Antennas Based on LT-GaAs and In0.38Ga0.62As

The total efficiency of the optical-terahertz conversion ηtotal in photoconductive antennas (PCAs) on the basis of different materials (LT-GaAs and In0.38Ga0.62As) under optical laser excitation at wavelengths of 800 and 1030 nm is studied. It is shown that the photoconductive material factor μτ2 has a significant impact on the magnitude of the THz photocurrent and the value of ηtotal. With the use of electromagnetic modeling, the processes of heat transfer are studied and the power of Joule heating in these PCAs is evaluated.

[1]  M. Koch,et al.  A numerical study of photoconductive dipole antennas: the real emission frequency and an improved antenna design , 2006, SPIE Photonics Europe.

[2]  P. P. Maltsev,et al.  Intensive Terahertz Radiation from InXGa1-XAs due to Photo-Dember Effect , 2016 .

[3]  Nezih Tolga Yardimci,et al.  High Sensitivity Terahertz Detection through Large-Area Plasmonic Nano-Antenna Arrays , 2016, Scientific Reports.

[4]  Alejandro Álvarez Melcón,et al.  Radiation Efficiency Issues in Planar Antennas on Electrically Thick Substrates and Solutions , 2013, IEEE Transactions on Antennas and Propagation.

[5]  A. E. Yachmenev,et al.  Electrical and thermal properties of photoconductive antennas based on InxGa1 – xAs (x > 0.3) with a metamorphic buffer layer for the generation of terahertz radiation , 2017 .

[6]  Michael R. Melloch,et al.  Carrier lifetime versus anneal in low temperature growth GaAs , 1993 .

[7]  Sascha Preu,et al.  1550 nm ErAs:In(Al)GaAs large area photoconductive emitters , 2012 .

[8]  Jens Klier,et al.  Photoconductive antennas based on low temperature grown GaAs on silicon substrates for broadband terahertz generation and detection , 2015, 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz).

[9]  Christopher W. Berry,et al.  7.5% Optical-to-Terahertz Conversion Efficiency Offered by Photoconductive Emitters With Three-Dimensional Plasmonic Contact Electrodes , 2014, IEEE Transactions on Terahertz Science and Technology.

[10]  Christopher M. Collier,et al.  Photoconductive terahertz generation from textured semiconductor materials , 2016, Scientific Reports.

[11]  E. Klimov,et al.  Investigation of the optical properties of GaAs with δ-Si doping grown by molecular-beam epitaxy at low temperatures , 2015 .

[12]  Ci-Ling Pan,et al.  THz radiation emission properties of multienergy arsenic-ion-implanted GaAs and semi-insulating GaAs based photoconductive antennas , 2003, Journal of Applied Physics.

[13]  G Klatt,et al.  Impulsive terahertz radiation with high electric fields from an amplifier-driven large-area photoconductive antenna. , 2010, Optics express.

[14]  Yi Huang,et al.  Terahertz photoconductive antenna efficiency , 2011, 2011 International Workshop on Antenna Technology (iWAT).

[15]  G. B. Galiev,et al.  Electron effective masses in an InGaAs quantum well with InAs and GaAs inserts , 2012 .

[16]  A. E. Yachmenev,et al.  Terahertz radiation in In0.38Ga0.62As grown on a GaAs wafer with a metamorphic buffer layer under femtosecond laser excitation , 2017 .

[17]  Nathan M. Burford,et al.  Review of terahertz photoconductive antenna technology , 2017 .

[18]  M. Nuss,et al.  Subpicosecond photoconducting dipole antennas , 1988 .