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Publication Detail
Generation of continuous wave terahertz frequency radiation from metal-organic chemical vapour deposition grown Fe-doped InGaAs and InGaAsP
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Mohandas RA, Freeman JR, Rosamond MC, Hatem O, Chowdhury S, Ponnampalam L, Fice M, Seeds AJ, Cannard PJ, Robertson MJ, Moodie DG, Cunningham JE, Davies AG, Linfield EH, Dean P
  • Publication date:
  • Journal:
    Journal of Applied Physics
  • Volume:
  • Issue:
  • Status:
  • Print ISSN:
© 2016 Author(s).We demonstrate the generation of continuous wave terahertz (THz) frequency radiation from photomixers fabricated on both Fe-doped InGaAs and Fe-doped InGaAsP, grown by metal-organic chemical vapor deposition. The photomixers were excited using a pair of distributed Bragg reflector lasers with emission around 1550 nm, and THz radiation was emitted over a bandwidth of greater than 2.4 THz. Two InGaAs and four InGaAsP wafers with different Fe doping concentrations were investigated, with the InGaAs material found to outperform the InGaAsP in terms of emitted THz power. The dependencies of the emitted power on the photomixer applied bias, incident laser power, and material doping level were also studied.
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