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We report progress on the development of a new technique that has the potential to enable the vacuum deposition of OLEDs with feature sizes ≤ 20um, and hence high resolution OLED displays. An OLED device with 16um by 130um sub-pixel size has been successfully demonstrated utilizing the novel idea of the in-situ shadow mask patterning method showing the capability of this method to achieve high resolution...
The design and characterization of a silicon-on-insulator planar concave grating based (de)multiplexer operating at 3.8µm is reported. Low insertion loss (≈1.6dB) and good crosstalk characteristics (≈19dB) are demonstrated.
We demonstrate the transverse-mode control of 980nm VCSELs using highly angular dependent HCG mirrors. The fabricated a-Si HCG clearly shows the large angular dependence of reflectivity, which enables single transverse-mode operations of large-area VCSELs.
Vertical cavity surface emitting lasers (VCSELs) are an important light source for applications in communication and appliances consumer use. However, the types of III-V semiconductor materials that can be used to manufacture monolithic VCSELs are limited to only few choices. Moreover, limitations of the device materials will also limit the functionality of VCSELs incorporated into microsystems. Various...
We propose a new type of CMOS-compatible polarization splitting antenna based on the dielectric-coated metal surfaces milled with a sub-wavelength aperture surrounded by asymmetric polarization-dependent indentations.
We have proposed and experimentally demonstrated a scheme for highly efficient excitation of surface plasmon using a structure consisting of an aperture in metal with a thin dielectric film at one side of the aperture.
A distributed antenna-coupling scheme for THz quantum cascade lasers is introduced. Single-mode emission in a narrow beam pattern, with an order of magnitude increase in output power is predicted compared to previous distributed-feedback schemes.
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