Table 1 Summary of THz generation schemes commonly used in small laboratories

From: A novel scheme for ultrashort terahertz pulse generation over a gapless wide spectral range: Raman-resonance-enhanced four-wave mixing

Scheme

Reference

Input parameters

Output characteristics

Wave-length (μm)

Pulse energy (μJ)

Peak freq. (THz)

Bandwidth (THz)

Pulse energy (μJ)

Conversion (‰)

OR in LiNbO3

Ref. 25

0.8

6.5 × 103

0.35

0.5

6.4

1

Gas plasma

Ref. 26

0.8

560

6

12

~0.06a

~0.1a

DFG in GaSe

Ref. 11

1.1

~300

30

10

1.7

~6

~1.2

~300

DFG in GaSe

Ref. 13

1.03

~3

13

6

1.5 × 10–3, b

0.5b

1.07

4.7

R-FWM in diamond

This work

1.45

85

5

9

5 × 10–3

0.5

1.80

35

10

1.5 × 10–2

1.5

~6

10

15

4.1 × 10–2

4

  1. aEstimated with 10–4 yield
  2. bScaled from THz generation at higher frequency in ref. 13. The pulse repetition rate was 190 kHz
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