Photoconductive Step-Function Sampling

Joo Hiuk Son, Joungho Kim, Gerard A. Mourou

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Measurement of picosecond electrical signals using a photoconductive step-function gate is demonstrated analytically and experimentally. The time resolution of our step-function technique is limited only by the rise time of the step-function, which is approximately the same as the laser pulse width. Also, a regular, undoped semiconductor material, which is essential for the realization of a short-duration gate, can be used instead of the highly defected material. The use of undoped material gives 10 to 100 times higher sensitivity in the measurement than the impulse-function technique because of the high mobility of the undoped material.

Original languageEnglish
Pages (from-to)186-188
Number of pages3
JournalIEEE Microwave and Guided Wave Letters
Issue number6
StatePublished - Jun 1994


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