Table 1.
Performances of graphene photodetectors in the mid-infrared range beyond the 1.55 μm wavelength band
| Reference | Type | Mechanism | λ (μm) | (External) Responsivity | Pin (μW) | Vbias (V) | BW3 dB |
|---|---|---|---|---|---|---|---|
| 35 | GSH, surface-illuminated | IPE | 2 | 0.16 mA/W | ~0.5 | 0 | ~kHz |
| 36a | MGM, surface-illuminated | PV | 3 | 2 A/W | 2.5 | 0.02 | – |
| 37b | MGM, surface-illuminated (at T = 10 K) | BOL | 10 | 6.25 mA/W | 0.8 | 2.4 × 10−5 | – |
| 38 | GIG, surface-illuminated | Photogating | Up to 3.2 | >1 A/W | ~6 | 1 | ~Hz |
| 41 | GSH, waveguide-type | IPE | 2.75 | 130 mA/W | <1 | 1.5 | ~11 kHz |
| 42 | GSH, waveguide-type | IPE | 2.75 | 4.5 mA/W | 10 | −1 | – |
| 43 | MGM, waveguide-type | – | 3.8 | 2 mA/W | ~300 | −1 | – |
| This work: Device A | MGM, waveguide-type | BOL | 2 | 52 mA/W | 280 | −0.3 | >20 GHzc |
| This work: Device B | 70 mA/W | >20 GHzc |
aThe operation wavelength ranges from 0.8 to 20 μm, and the 3 dB bandwidth of 50 GHz is measured at λ = 0.8 μm
bThe operation wavelengths are 0.658, 1.03, 2, and 10 μm. The external responsivity is evaluated from an internal responsivity of 2 × 105 V/W, while the graphene absorptance is 0.5%. The 3 dB bandwidth of >1 GHz is measured at 1.03 μm
cThe 3 dB bandwidths are setup-limited