Browsing by Author "Chang, Zi-Chang"

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Chip-Scale Nanophotonic Chemical and Biological Sensors using CMOS Process
(2009)
Bollschweiler, Lincoln
;
English, Alex
;
Baker, R. Jacob
;
Kuang, Wan
;
Chang, Zi-Chang
A monolithic integrated chip-scale surface plasmon resonance (SPR) sensor is demonstrated. The device consists of a pn photodiode covered with a periodic modified thin metal film whose lattice constant is on the order of the wavelength of light. The device performs real-time measurement of resonant wavelengths of enhanced optical transmission due to surface plasmon resonance, which are influenced by the presence of chemical or biological materials at the device\'s surface.
Room temperature continuous wave operation and characterization of photonic crystal nanolaser on a sapphire substrate
(2009-05-21)
Shih, M. H.
;
Yang, Yi-Chun
;
Liu, Yu-Chen
;
Chang, Zi-Chang
;
Hsu, Kung-Shu
A compact photonic crystal defect nanocavity was fabricated on a sapphire substrate. Continuous wave lasing at room temperature was achieved with a low threshold power. We characterized the operated mode, quality factor and radiative efficiency for the compact laser. The thermal properties of the nanolaser were also investigated.