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Surface-plasmon resonance of a planar lollipop near-field transducer
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View: Figures


Image of FIG. 1.
FIG. 1.

A PSIM with a dual offset grating used to focus a waveguide mode onto the lollipop NFT.

Image of FIG. 2.
FIG. 2.

Optical pump-probe setup for characterizing surface-plasmon resonance. : quarter-wave plate; : half-wave plate; PM: polarizing maintaining; BS: beam splitter; and NA: numerical aperture.

Image of FIG. 3.
FIG. 3.

(a) Photothermal images at the excitation wavelength , 860, and 950 nm, (b) the normalized peak signal as a function of , and (c) the calculated light absorption as a function of . In (a) both horizontal and vertical axis are in micrometers. The bar is in millivolts.

Image of FIG. 4.
FIG. 4.

(a) The normalized peak photothermal signal and (b) the calculated light absorption in the NFT as a function of for the NFT of peg length of 62.5 nm. The lollipop is 20-nm-thick and the disk diameter is 190 nm.

Image of FIG. 5.
FIG. 5.

Surface topography as a function of peg length after 1.87 mW laser illumination at . The lollipop is 20-nm-thick with disk diameter of 190 nm and peg width of 60 nm. These devices were overlapped by . Each frame is by . The dash circle is a guide of the eyes for the mark recorded by the NFT.

Image of FIG. 6.
FIG. 6.

Same as Fig. 5 , except that the disk diameter of the NFT is 150 nm and the excitation light wavelength is 880 nm. The optical power for recording is .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Surface-plasmon resonance of a planar lollipop near-field transducer