Table 2 Numerical values used for the one-dimensional Drude-Lorentz PCA simulation.

From: A modulation-doped heterostructure-based terahertz photoconductive antenna emitter with recessed metal contacts

PCA

Carrier density, \(n_{i}\)

Trapping time constant, \(\tau_{c}\)

Scattering time constant, \(\tau_{s}\)

Recombination time constant, \(\tau_{r}\)

Electron mobility, \(\mu\)

SI-GaAs

2.00 × 1016 cm−336

100 ps30

250 fs31

1 ns32

6650 cm2 V−1 s−1a

LT-GaAs

1.00 × 1018 cm−333

1 ps37

20 fs38

100 ps37

500 cm2 V−1 s−1a

MDH (Top)

1.00 × 1017 cm−3b

1 µs34

100 fsa

1 µs35

2660 cm2 V−1 s−1b

MDH (Recessed)

1.00 × 1017 cm−3b

1 µs34

250 fsc

1 µs35

6650 cm2 V−1 s−1c

  1. aFrom Drude relation.
  2. bFrom Hall measurements.
  3. cFitting parameter.