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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...
Amorphous silicon thin-film transistors were fabricated on glass substrates in a top-gate configuration in which the metallic gate was replaced by an electrolytic solution with an immersed gate bias electrode. A silicon nitride passivation layer was used to avoid leakage and electrochemical reactions. Transfer and output curves showed transistor behavior. The threshold voltage of ion-sensitive thin-film...
THz quantum cascade (QC) lasers with an active-region thickness of 5.86 mum was demonstrated. The current threshold was then reduced by reducing the device surface. The laser resonator is based on a micro-cylindrical geometry. In general micro-cylindrical resonators rely on total-internal reflection on the cavity sidewalls in order to confine the light. The small (r=25 mum) and medium (r=37.5 mum)...
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