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Spatially different arrangements of identical metaatoms in a unit cell bring about distinct properties in stereometamaterials. Integrating the stereometamaterial into a perfect metamaterial absorber, we designed, fabricated, and characterized a device with single or double band absorption responses and an absorption/reflection switching characteristic dependent upon the polarization of the incident...
We report that various recent design modifications and optimizations have produced significant advances in the performance of interband cascade lasers (ICLs) for the mid-IR spectral band. Figure 1 illustrates the progression with time of ICL pulsed threshold current densities, as compared to some of the lowest reported results for quantum cascade lasers. All of the ICL devices were standard 150-µm-wide...
Semiconductor laser sources for the critical 3–5 um spectral range are evolving and improving rapidly, with significant advancements reported within the last year for three fundamentally different approaches: the intersubband quantum cascade laser (QCL),1 the type-I quantum well (QW) diode laser,2 and the interband cascade laser (ICL).3 Of these three, the most promising candidate to cover the entire...
We report the InP HBT scaling strategies required for 80-160 Gb/s optical fiber ICs, and a variety of recent HBT results, including 87 GHz static frequency dividers, 175 GHz amplifiers, and >450 GHz fmax DHBTs
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