کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5362768 | 1388292 | 2012 | 4 صفحه PDF | دانلود رایگان |
We show that a microwave near-field coaxial resonator system allows mechanical cantilever excitation on a scale much shorter than the microwave wavelength. Thermal noise is observed in the unexcited system, enabling room temperature displacement sensitivity of â¼70Â fm/Hz1/2. The measured force between near-field probe and cantilever varies with separation, in excellent agreement with theory. Uniquely, optical excitation and read-out lasers are also included. The dependence of mechanical resonator quality factor on ambient air pressure has been accurately measured. We have demonstrate passive cantilever mode cooling from 300Â K to 80Â K by frequency detuning the microwave resonator and propose pulsed cooling operation to enable several high-sensitivity applications.
Research highlights⺠Microwave near-field allows cantilever excitation on a scale less than microwave λ. ⺠We show that at room temperature our system displacement sensitivity â¼70 fm/Hz1/2. ⺠Measured force between near-field probe and cantilever agreed with theory. ⺠The dependence of mechanical resonator Q on pressure accurately measured. ⺠We have demonstrated passive cantilever mode cooling from 300 K to 80 K.
Journal: Applied Surface Science - Volume 258, Issue 6, 1 January 2012, Pages 2192-2195