Abstract
We report a sensitive photodetector, based on a manganite junction La2/3Ca1/3MnO3/Si, for femtosecond (fs) pulse laser energy per pulse and average power measurements. The La2/3Ca1/3MnO3/Si photodetector exhibits D⁎ (normalized detectivity) greater than 5.229×109cmHz1/2W−1. The open-circuit photovoltage and short-circuit photocurrent responsivities reach ∼268V/mJ and ∼275A/mJ for single pulse irradiation, respectively, and the open-circuit photovoltage responsivity reaches ∼1.7V/W for average power illumination. The experimental results make the manganite junction a promising fs laser measurement detector and reference standard for calibrating fs lasers.
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