Electromagnetic radiation detection using cantilever-based photoacoustic effect: A method for realizing power detectors with broad spectral sensitivity and large dynamic range

A sensitive photoacoustic detection approach employing a silicon cantilever is investigated for power measurement of electromagnetic radiation. The technique which is actuated by pressure waves generated through radiation-induced heat depicts high sensitivity for a considerably large spectral range from 325 nm to 1523 nm. The implemented method shows linear response in the measurement of radiation power from 15 nW to 6 mW demonstrating a dynamic range of almost six orders of magnitude. A numerical model has been developed to analyze and optimize the measurement sensitivity. The model allows studying different dimensions of the cantilever which is one of the key components of the radiation detection process. The numerical results are in good agreement with experimental results. The electromagnetic power detection technique shows future potential for industrial applications and scientific studies. (c) 2021 The Authors. Published by Elsevier B.V. CC_BY_4.0

Automated summary

A sensitive photoacoustic detection approach utilizing a silicon cantilever is investigated for measuring the power of electromagnetic radiation. The technique, activated by pressure waves generated from radiation-induced heat, exhibits high sensitivity across a wide spectral range from 325 nm to 1523 nm. The implemented method demonstrates a linear response in measuring radiation power from 15 nW to 6 mW, with a dynamic range of nearly six orders of magnitude. A numerical model is developed to optimize the measurement sensitivity, and the results align well with experimental findings. This electromagnetic power detection technique shows promising potential for industrial applications and scientific studies.