Theoretical analysis of the influences of barrier-enhancement layers on transient responses of MSM photodetectors

Transient responses of In/sub 0.53/Ga/sub 0.47/As MSM PDs with abrupt and graded barrier-enhancement layers are simulated by using an ensemble Monte Carlo technique. The effect of the graded layer on transient responses and an appropriate graded-layer thickness for achieving fast responses are discussed. Also, a relevant device scaling law is proposed for In/sub 0.53/Ga/sub 0./,/sub 47/As MSM PDs with graded barrier-enhancement layers. >

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