1Key Laboratory of Atomic and Molecular Nanosciences of Education Ministry and Department of Physics, Tsinghua University, Beijing 100084 2CAAD Laboratory, Tsinghua University, Beijing 100084
We propose a new method to detect near-field by using a single-tine oscillating tuning fork with mechanically asymmetric excitation that exhibits the sensitivity and stability better than that by using a double-tine oscillating one. Comparison of shear forces for the two methods demonstrate that the single-tine oscillating tuning fork provides a simpler and more sensitive method for near-field measurements. A theoretical analysis is presented for explanation to the greater sensitivity. The method is demonstrated by imaging a sparse-packed layer of micro-spheres in size of 200 nm.
TAN Xiao-Jing, SUN Jia-Lin, LIU Sheng, GUO Ji-Hua, SUN Hong-San. Shear Force Detection Using Single-Tine Oscillating Tuning Fork for Scanning Near-Field Optical Microscopy[J]. Chin. Phys. Lett., 2003, 20(3): 338-341.
TAN Xiao-Jing, SUN Jia-Lin, LIU Sheng, GUO Ji-Hua, SUN Hong-San. Shear Force Detection Using Single-Tine Oscillating Tuning Fork for Scanning Near-Field Optical Microscopy[J]. Chin. Phys. Lett., 2003, 20(3): 338-341.
TAN Xiao-Jing, SUN Jia-Lin, LIU Sheng, GUO Ji-Hua, SUN Hong-San. Shear Force Detection Using Single-Tine Oscillating Tuning Fork for Scanning Near-Field Optical Microscopy[J]. Chin. Phys. Lett., 2003, 20(3): 338-341.
TAN Xiao-Jing, SUN Jia-Lin, LIU Sheng, GUO Ji-Hua, SUN Hong-San. Shear Force Detection Using Single-Tine Oscillating Tuning Fork for Scanning Near-Field Optical Microscopy[J]. Chin. Phys. Lett., 2003, 20(3): 338-341.