High efficiency generation of THz from 1550-nm: exceeding the Manley-Rowe limit with photoconductive emitters
A Feldman, Todd E. Harvey, Richard Mirin, A. Mingardi, W-D. Zhang, E. R. Brown
Two photoconductive emitters - one with a self-complementary square spiral antenna, and the other with a resonant slot antenna - were fabricated on a GaAs epilayer embedded with ErAs quantum dots. Driven with 1550 nm fiber mode-locked lasers, 117 υW broadband THz power was generated from the device with the spiral antenna, and 2 υW from the device with resonant slot antenna. The optical-to-THz conversion is through extrinsic photoconductivity, which can and does surpass the Manley-Rowe limit.
, Harvey, T.
, Mirin, R.
, Mingardi, A.
, Zhang, W.
and Brown, E.
High efficiency generation of THz from 1550-nm: exceeding the Manley-Rowe limit with photoconductive emitters, Optics Express, [online], https://doi.org/10.1364/OE.26.014472, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=925580
(Accessed December 9, 2023)