Atomic Layer Thermopile Materials: Physics and Application

Table 2

A recapitulative comparison among the different types of photodetectors.

Parameter	Photon counting (Semiconductors)	Bolometers	ALT devices (LITV signal)
Spectral range	Narrow	Broad	Broad
Response time	Fast (ps)	Slow (ms)	Fast (sub-ps to ns)
Sensitivity	high	high	good
Bias	need	need	Do not need
Working temperature	≤300 K	45–110 K	≥280 K