Micromechanical Photonics - H Ukita Part 7 pot
Micromechanical Photonics - H. Ukita Part 7 pot
... force
of the light intensity in the Rayleigh regime where the size is much less than
the wavelength, and also due to the diffractive effect of the light at the sur-
face of the object with a size ... Tweezers 1 17
Dichromatic mirror (DM)
Objective
CCD camera
Spectroscopic data
Q-switch YAG Laser
CW YAG Laser
Optical fiber
Electrochemical measurement
OH
-
OH
-
OH
-
OH
-
D
D
D
H...
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 t...
Micromechanical Photonics - H. Ukita Part 6 pot
... 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...
Micromechanical Photonics - H. Ukita Part 11 pot
... six-layer thin
film super-RENS. From these results, we 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 ... 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 parti...
Micromechanical Photonics - H. Ukita Part 1 ppt
... 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...
Micromechanical Photonics - H. Ukita Part 2 ppsx
... Japan
GeAsTe
LD–PD
h1
h2
h0
h
Slider
a-SiN :H
a-SiN :H
a-SiN :H
Au
Substrate
Fig. 1.32. A flying optical head with a laser diode. The optical head consists of a
monolithically integrated laser diode (LD) and a photodiode ... corre-
sponding to the high-reflectivity part of the nonmark or a weak spontaneous
emission corresponding to the low-reflectivity part of the mark. That is, the...
Micromechanical Photonics - H. Ukita Part 5 ppt
... −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 ... transparent
particle whose refractive index is slightly higher than that of the surround-
ing medium. Figure 3.8a shows that the focused laser beam illuminates the
upper part in a microspher...
Micromechanical Photonics - H. Ukita Part 10 ppt
... 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...
Micromechanical Photonics - H. Ukita Part 12 ppsx
... 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 µ varies with the temperature T as shown by
log
10
µ = −1.6 477 9 ... 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
Hamakar constant, a is the radius of the particle, δ is the shortest d...
Micromechanical Photonics - H. Ukita Part 13 pps
... Dhar L, Chichester R,
Yeh JHJ (1999) High-power laser light source for near-field optics and
its application to high-density optical data storage. Appl Phys Lett
75 :1515–15 17
5.43 Chen F, Zhai J, ... 3
half amorphous, 206
half-wavelength, 51
half-wavelength interval, 40
Halley’s comet, 81
Hamaker approximation, 213
heat-assisted magnetic recording
(HAMR), 1 97
heavy particle, 105
high refl...
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