Abstract
In this paper, we propose using metamaterials for enhanced operation of quantum dot infrared photodetectors (QDIPs) in one- and two-color detection and theoretically calculate its absorption and responsivity. To do so, first, a split ring resonator (SRR) is designed and proposed to resonate at the wavelength of intersubband transition from ground state to first excited state of quantum dots, which is around 9.8 $\mu \text{m}$ . The results show enhanced absorption and responsivity by a factor of 1.5. In addition, another SRR is proposed to support two operation wavelengths and designed to resonate with the two peak absorption wavelengths of QDIP. The results of simulation confirm enhanced absorption and responsivity for both the wavelengths at 9.8 and $6~\mu \text{m}$ by a factor of 1.5.
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