The modeling for investigating the thermal effect on slider in heat assisted magnetic recording is built and its verification
is conducted by comparing the simulation results and experiment results. The temperature distribution on the slider
induced by locally heated media in 1Tb/in2 is simulated and the results show that the effect is within a very small zone
on the bottom surface. The temperature changes on other surfaces are less than 0.1°C, which can be negligible.
In this paper the focusing effect of flat metallic-slit array in micro-meter scale area is discussed and the role of
surface plasmons waves inside slits is recognized. A proximate relationship between the equivalent focal length
and slit material, slit geometrical parameters is built. The theoretically derived focal length and that from Finite
Difference Time Domain (FDTD) simulation is proved to be in good agreement. Additionally, FWHM of focal
point, focal depth and intensity of focal point for the slit array with invariant slit width and the slit array with
variant slit width are compared as well. The slit array with varied slit width is found to have the better
performance than slit array with invariant slit width.
Surface plasmon propagation properties for nano-sized metal aperture and nano-wire structures are studied based on the
waveguide theory. It is verified that there are only TM0 and HE1 mode existing in both structures. For nano-wire
structure, however, there is no cut-off radii for both TM0 and HE1 mode. On the contrast, there is a cut-off radius for
nano-sized silver aperture structure, and even more, there are several characteristic radius coefficients a/ λ, -0.32, 0.73.
For each section, the EM wave may takes on different features, e.g., totally-bounded features along the aperture interface
for a/ λ >0.73, or oscillation inside core or strong attenuation along z direction for 0.32<a/ λ<0.73). HE1 mode of metal
aperture doesn't show cut-off radius as well, but the wave-number along z direction monotonically increase with the
radius coefficient a/ λ in contrast with existence of a characteristic radius coefficient a/ λ of 0.41 for nano-wire.
Before reaching the true heat assisted magnetic recording, which is in optical near-field case for high recording density, the component level researches are needed. This requires a platform to support these kinds of researches. In this talk, the platform structure is introduced and its functions of researching on media material and structures, interface, overcoat and lubricant are discussed. Finally, some experimental results are presented.
This paper reviews the past analytical and non-analytical approaches for the Surface Plasmons (SPs) effect, present a simple description to the widely adopted curvilinear coordinate method. Based on the concept of Fourier decomposition of any complicated grating profiles, a comprehensive analysis is given to the contribution of every order components to the overall behavior of the practical zero-order metal gratings. It successfully predicts the energy gap, resonant SPs modes, the red-shift behavior and the broadening effect of energy gap by higher order components. At the same time, it's found that within certain wavelength range of interest, only first several orders of components are needed to be taken into account to predict the behavior of the non-sinusoidal gratings. As an application, this analysis approach is extended to behavior of the triangular gratings. The limitation and possible generalization of this method are also discussed.
The three-dimensional model of the packaging device is established based on ANSYS simulation platform. The thermal properties such as time response, axial and radial temperature distributions at different applied voltages are exhibited. With aids of Real Time Optical Spectrum Analyzing System and IR Camera System, time response of the device and axial temperature distribution along the coated fiber with intracore FBG are both demonstrated. Temperature responses to different applied voltages are achieved after measuring voltage induced wavelength shift and temperature dependent wavelength shift. Simulation shows results in agreement with those of experiment. Finally, regulations on length of the metal coating, size of the package, power consumption and tuning properties of the packaging device are discussed.