Department of Physics
We measure the force exerted by microwave radiation on a centimeter-sized parallel-plate metallic resonant unit. By varying the ambient environment, we distinguish carefully between the direct radiation force and the indirect photothermal component. At the microwave resonance, the former is measured quantitatively to be 100 times larger than the conventional radiation force. Furthermore, the enhanced radiation force tends to increase the separation of the plates. Both the direction and the magnitude of the measured force agree well with numerical calculations.
Source Publication Title
Physical Review Letters
American Physical Society
© 2014 American Physical Society
This work is supported by Grants No. HKUST2/CRF/11G and No. AoE/P-02/12 from the Research Grants Council of Hong Kong SAR. Z. H. H. is also supported by the NSFC (Grant No. 11304215) and the NSF of Jiangsu Province (Grant No. BK20130281).
Link to Publisher's Edition
Marcet, Z., Z. H. Hang, S. B. Wang, Tsz Fai Jack Ng, C. T. Chan, and H. B. Chan. "Measurement of enhanced radiation force on a parallel metallic-plate system in the microwave regime." Physical Review Letters 112 (2014): 045504-1-045504-5.