“…Table comparing the characteristics of commonly used THz emitters in THz-TDS. For each tick the reference, R, indicates the references that demonstrated achievement of the particular source characteristic, as follows: R1: 17 ; R2: 15,16 ; R3: [12][13][14][15][16] ; R4: [22][23][24] ; R5: 5,26,27 ; R6: 5,25,26,28 ; R7: 33 ; R8: 36,37 ; R9: 39 ; R10: 38 ; R11: 38 ; R12: [39][40][41] ; R13: 40,41 ; R14: 42 ; R15: 39,41 ; R16: 41 ; R17: 47 ; R18: 48,49 ; R19: 48,49 ; R20: 58 ; R21: 57,58 ; R22: 57,58 ; R23: 57 .…”