1. Optical Rotor
Optical tweezers have been successfully utilized
in various scientific and engineering fields such as biology, microchemistry,
physics, optics and micromechanics. Their ability to rotate microobjects remotely
without the use of bearings presents important opportunities in optical micro
electro mechanical systems (optical MEMS) and biotechnology. This research subject includes the followings: optical tweezers, design,
fabrication and evaluation of an optical rotor to increase the mixing performance of micro-liquids to enable future
fluidic applications. The optical rotor will be used as a mixer in micro-total
analysis systems (m-TAS).
* Optical tweezers ....................................................[LEOS'99:169-170,
1999], [Opt Rev, 13:436-442, 2006 PDF]
* Theoretical Analysis (Torque, Fluid Dynamics) [Appl. Opt. 42 2708 2003 PDF].[Opt. Rev.15,97 2008 PDF]
* Fabrication: .......................................................[Trans IEE of Japan MSS-05-30:51-56, 2005 (In Japanese) PDF]
* Evaluation: .....................................................................[IEEE JST in QE on Optical MEMS 8:111-117, 2002 PDF]
* Mixer Application for m-TAS:.... .... [JSME, B-49, 3,.645-652, 2006 PDF] [JIEEC E 129 161-166, 2009 PDF],
2. Near Field
The near field represents an electromagnetic evanescent field that has its intensity maximum at the surface and an exponentially decaying field perpendicular to it. It is localized within a hundred nanometers. The near field cannot be probed by conventional light detectors because it does not propagate. However, if we could access and control it, we would be able to observe or read / write or fabricate beyond the wavelength resolution. These science and technology fields, which include near-field scanning microscopy, optical data storage and the processing industry are also concerned with micromechanical photonics. This research subject includes the followings: near field's features, theoretical
analyses, experimental analyses and applications mainly related to optical
storage.
* Theoretical Analysis (FDTD)
* Photocantilever probe
* Gold particle probe: ...............................................................................[Opt Rev 11:365-369, 2004 PDF]
* Super-RENS optical disk: ..............................................[Jpn J Appl Phys 46, 5838-5844: 2007 PDF]
3. Extremely-Short-External-Cavity Laser Diode
In this research field, we deal with laser diodes closely aligned with
a microstructure including a diaphragm, a cantilever and a slider. New
functional and sophisticated microdevices are given by closely aligning
or integrating the microstructure with a laser diode, which does not require
a lens system.
* Theoretical Analysis
* Experimental analysis: .............................................................................[Opt Rev 11:188-192, 2004 PDF]
* Tunable laser diode............................[IEEE JST in QE on Optical Microsystems 10:622-628, 2004 PDF]
* Resonant sensor: .......................................................................................[Science 260:786-789, 1993 PDF]
* Optically switched laser head: ........................................... ............[Proc SPIE 1499:48-262, 1991 PDF]