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Exploiting optical nano-antennas to boost the near-field confinement within a small volume can increase the limit of molecular detection by an order of magnitude. We present a novel antenna design based on Au-SiO2-Au single nanorod integrated on the facet of a quantum cascade laser operating in the midinfrared region of the optical spectrum. Finite-difference time-domain simulations showed that for...
Here we will present a novel method of forming QD based on the lateral confinement on QW by electrical field. The electrical field would deplete the QW into a very small region, forming a "quantum disk". The field induced lateral confinement combined with the vertical confinement of the QW would form a three dimensional confinement.
We have designed a novel avalanche-free single photon detector for IR wavelengths above 1 μm. The detector shows high quantum efficiency and high gain. A detailed finite-element-method based three-dimensional simulation was developed to model and evaluate the nonlinear effects involved in the design.
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