In-house near-field scanning optical microscopy tip with an opening of 75 nm.
Amplitude resonance curves for four values of (same ) and six values of (same ) increasing from left to right.
Phase resonance curves for four values of (same ) and six values of (same ) increasing from left to right.
Dimensions in millimeter of the tuning fork.
Simulations of the first four vibration modes of a tuning fork. (a) Mode 1, . (b) Mode 2, . (c) Mode 3, . (d) Mode 4, .
Schematic overview of the demonstration setup.
Pictures of the giant scanning probe microscope. (a) Toothpick and tuning fork compared to a real near-field scanning optical microscopy tuning fork with glass fiber. (b) Overview of the basic setup with excitation by a piezoelectric element. (c) Close-up of excitation with a piezoelectric element. (d) Alternative setup with magnetic excitation and angular adjustments.
Images obtained with the giant scanning probe microscope using a toothpick. (a) Scan of a 2 Euro coin. (b) Scan of a 100 dollar banknote.
Comparison of demonstration and real near-field scanning optical microscopy setups. Note that many of the operating characteristics are similar except for the scale of the tip and the scanning area. For one-fiftieth of the cost you can scan an area that is 200 times larger.
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