Matt S Chang

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Subcritical water has been used as an environment-friendly extraction fluid for many classes of organic compounds. It was used for the removal of phthalate esters (PEs), such as di-methyl phthalate, DMP; di-ethyl phthalate, DEP; di-iso-propyl phthalate, DIPP; di-n-butyl phthalate, DBP; benzyl butyl phthalate, BBP; di-n-pentyl phthalate, DpentP; di-n-hexyl(More)
The performance of three optics-based interference cancellation systems are compared and contrasted with each other, and with traditional electronic techniques for interference cancellation. The comparison is based on a set of common performance metrics that we have developed for this purpose. It is shown that thorough evaluation of our optical approaches(More)
The presence of triclosan and triclocarban, two endocrine-disrupting chemicals and antimicrobial agents, and transformation products of triclocarban, 1,3-di(phenyl)urea, 1,3-bis(4-chlorophenyl)urea and 1,3-bis(3,4-dichlorophenyl)urea, in tap water, treated household drinking water, bottled water, and river water samples were investigated using solid-phase(More)
An analysis on the tolerance to the phase-matching condition for the integrated acoustooptic filter using coupling of TE(0) and TE(1) modes is presented. It is found that at a film thickness near cutoff, the tolerance in the film surface variation is relatively large; however, the tolerance in the film index variation may cause serious problems. It is also(More)
Amorphous chalcogenide films are evaluated holographically as inorganic resists. In particular, the resolution of As(2)S(3) films is determined experimentally. The exposure characteristics of As(2)S(3) films for holographic storage and lithographic pattern generation are studied. An empirical model is discussed. Light diffraction for in situ monitoring of(More)
A comparison of GaAs/n(+)GaAs, GaAs/GaAsP, and GaAs/AlGaAs waveguide structures is presented. Their fabrication processes and their transmission properties at 10.6-microm wavelength are described. The loss due to the free carrier absorption of the substrate is analyzed. Experimentally, an attenuation rate of 2 dB/cm in a single mode (~7 microm) GaAs/GaAsp(More)