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We report a holographic photopolymerization technique to fabricate a polymeric photonic bandgap structure whose period varies gradually in the lateral direction, leading to a unique rainbow-colored reflection image in the same viewing angle.
We report a holographic photopolymerization technique to fabricate a polymeric photonic bandgap structure whose period varies gradually along the length of the structure, leading to a unique rainbow-colored reflection image in the same viewing angle.
We present the design, fabrication, and characterization of a sensor capable of detecting minute changes in pressure within a polydimethylsiloxane (PDMS) microchannel. The device consists of a guided-mode resonance (GMR) grating with a resonant wavelength of 731 nm embedded in an 85 µm thick PDMS membrane which acts as one wall of the microchannel. As pressure within the channel is increased, the...
We report the design, fabrication, and characterization of a pressure-tunable guided-mode resonance grating. A thin, flexible polydimethylsiloxane (PDMS) membrane was fabricated with an embedded titanium dioxide (TiO2) nanograting. When pressure is applied to the device, the membrane expands, and the pitch of the grating increases; this causes a shift in its resonant wavelength. By varying the pressure...
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