Single-/fused-band dual-mode mid-infrared imaging with colloidal quantum-dot triple-junctions

• DOI: 10.1364/prj.458351
• Publication Date: 2022-06-28T19:30:18Z
• Authors: Shuo Zhang; Ge Mu; Jie Cao; Yuning Luo; Qun Hao; Menglu Chen; Yimei Tan; Pengfei Zhao; Xin Tang
• Keywords: 02 engineering and technology; 0210 nano-technology

Image data acquired with fused multispectral information can be used for effective identification and navigation owing to additional beyond human vision, including thermal distribution, night molecular composition. However, the construction of photodetectors such capabilities is hindered by structural complexity arising from integration multiple semiconductor junctions distinct energy gaps lattice constants. In this work, we develop a colloidal quantum-dot dual-mode detector capable detecting, separating, fusing photons various wavelength ranges. Using three vertically stacked homojunctions alternating polarity, single-band short-wave infrared imaging fused-band (short-wave mid-wave infrared) achieved same controlling bias polarity magnitude. The detectors show detectivity up <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="m1"> <mml:mrow> <mml:mn>8</mml:mn> <mml:mo>×</mml:mo> <mml:msup> <mml:mn>10</mml:mn> </mml:mrow> </mml:msup> </mml:math> Jones at mode id="m2"> <mml:mn>3.1</mml:mn> <mml:mn>11</mml:mn> mode, respectively. Without image post-processing algorithms, could provide both vision information-enhanced capability. To best our knowledge, first that achieve functionality. operation changed high frequency 1.7 MHz, making it possible simultaneously remote temperature sensing.