Micromechanical Photonics - H Ukita Part 4 potx

... by the taper-ridged waveguide laser, but also by the highly thermally conductive slider and the re- duction of LD–PD attachment error. Light output is higher for the slider with the higher thermal ... µm, is the sum of the slider flying height h 0 , LD–PD attachment error h 1 (facet-to-slider surface error), and the protective-layer thickness h 2 . Since h 0 =0.9 µmandh 2 =0. 24 µm in...

Ngày tải lên: 10/08/2014, 05:20

... suspended. There are two kinds of surface micromachining: photolithography for a thick- ness less than several 10 µm, and electron beam lithography for a thickness of less than 1 µm. Photolithography Photolithography ... with wave- lengths less than that of UV light are irradiated onto electron-sensitive resist, as shown in Fig. 1.5. High-resolution patterning can be accomplished by scan- nin...

Ngày tải lên: 10/08/2014, 05:20

... to Micromechanical Photonics U-shaped LD PD Microlens Fig. 1.31. Photograph of the optical encoder. Courtesy of R. Sawada, NTT, Japan GeAsTe LD–PD h1 h2 h0 h Slider a-SiN :H a-SiN :H a-SiN :H Au Substrate Fig. ... USA parallel 45 ◦ mirrors has been demonstrated to match the optical axis of the LD with that of the micro-optical element [1.38]. Both the micro-XYZ stage and the fre...

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... −s below the center of the sphere. In the figure, (a) shows the trapping efficiency for the axial trap (Example 3 .4) and (b) that for the transverse trap (Prob- lem 3 .4) . Both show the maximum when the ... parameter. Both figures show that R reaches zero by changing the thickness of the Au (1) film. The smallest R will be achieved at the Si 3 N 4 thickness of 366 nm at the wavelength 1.3 µm a...

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... of the gradient force F g , which always pulls a sphere to the beam axis and the scattering force F s , which always pushes a sphere along the beam axis. Figure 3.23 shows the concept of the horizontal ... of the suspend- ing medium (water), respectively; c is the speed of light, and His the height of the specimen chamber (150 µm). A transversely moving sphere should stably remain near the sp...

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... light (Q max < 0). They also demonstrated that laser trapping was also possible in air [3.36]. -1 .5 -2 -2 .5 -3 -4 -5 -3 .5 -0 .1 -0 .1 -0 .1 -0 .1 -4 .5 1 .4 1.5 0 0 0.1 0.2 0.3 0.1 0.2 0.3 0 .4 0.1 0 0 0.2 0.3 0 .4 0.2 0.1 1.6 ... 1.5 0 0 0.1 0.2 0.3 0.1 0.2 0.3 0 .4 0.1 0 0 0.2 0.3 0 .4 0.2 0.1 1.6 1.7 1.8 n 1.9 2 2.1 2.2 2.3 2 .4 -1 .5 -2...

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... resolution is higher than that of the aperture probe because of the smaller radius of the apex. The near-field intensity is much stronger than that of the aperture probe because of the field enhancement ... of sample chamber (b) laser beam has a higher trapping efficiency than the downward one [5.25]. Figure 5.22a shows a photograph of the setup. The gold particle at the focal point of the object...

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... see the groove pitch of 1.6 µm with the gold probe. Figure 5.32 shows the rela- tionship between the averaged scattered light intensity and the groove profile. The scattered light with the gold particle ... confirm that the Sb-super-RENS has two states; one is due to the change of only mask layer (halfway amorphous), the other due to the change of both mask and recording layer (complete amor- p...

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... [5.11] F drag =3πµdv  1+ 9d 32  1 D − 1 H − D  , (5.23) where µ is the viscosity of the medium, H is the height of the sample chamber and D is the distance between the sphere and the wall surface of the chamber. The viscosity ... (b)? 5 .4. The van der Waals force F v between the particle and the wall is ex- pressed as the Hamaker approximation shown by (5.25) [5.26], where H is the...

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... near-field writ- ing on a phase-change optical disk. Appl Opt 41 :41 81 41 87 5 .45 Hirota K, Milster TD, Shimura K, Zhang Y, Jo JS (2000) Near-field phase change optical recording using a GaP hemispherical ... Machinery ISROMAC-8, Hawaii USA: 45 2 45 7 4. 13 Ogami Y, Nishikawa K, Ukita H (2005) Study on the mixing per- formance of a microoptical rotor by CFD. Trans Jpn Soc Mech Eng 71:...

Ngày tải lên: 10/08/2014, 05:20