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We report a 1.55μΜ square microcavity laser monolithically integrated on GaAs substrates. The mode characteristics of the microcavity laser are numerically investigated by three-dimensional finite difference time domain method. The dependences of the whispering-gallery modes on the width of the output waveguide and the etching depth are discussed. For the cavity with the side length of 12μm and the...
We propose a high-transmissivity, polarization-insensitive focusing lens (PIFL) using 2D blocky sub-wavelength high-contrast gratings (2D-BSW-HCGs). Simultaneously, a design method for 2D-BSW-HCGs PIFL is put forward. A PIFL with high transmissivity can be constructed by designing the transmissivity and phase shift profile of nonperiodic 2D-BSW-HCGs. Properties of focusing and transmission are numerically...
Sub-wavelength gratings are used in the new photodetector in this paper. The detectivity is enhanced by excitation of surface plasma waves (SPW) using a Metal Aperture Arrays grating. Sub-wavelength dielectric grating is used to replace the top Bottom Distributed Bragg Reflectors(DBR).
Surface plasma wave excitation filters is used in the new photodetector in this paper. The detectivity is enhanced by excitation of surface plasma waves (SPWs) using a Metal Aperture Arrays grating. A bias-tunable broadband response is achieved.
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