Hierarchical Phased-Array Antennas Coupled to Al KIDs: A Scalable Architecture for Multi-band Millimeter/Submillimeter Focal Planes

IF 1.1 3区 物理与天体物理 Q4 PHYSICS, APPLIED
Jean-Marc Martin, Junhan Kim, Fabien Defrance, Shibo Shu, Andrew D. Beyer, Peter K. Day, Jack Sayers, Sunil R. Golwala
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Abstract

We present the optical characterization of two-scale hierarchical phased-array antenna kinetic inductance detectors (KIDs) for millimeter/submillimeter wavelengths. Our KIDs have a lumped-element architecture with parallel plate capacitors and aluminum inductors. The incoming light is received with a hierarchical phased array of slot dipole antennas, split into 4 frequency bands (between 125 GHz and 365 GHz) with on-chip lumped-element band-pass filters, and routed to different KIDs using microstriplines. Individual pixels detect light for the 3 higher-frequency bands (190–365 GHz), and the signals from four individual pixels are coherently summed to create a larger pixel detecting light for the lowest frequency band (125–175 GHz). The spectral response of the band-pass filters was measured using Fourier transform spectroscopy (FTS), the far-field beam pattern of the phased-array antennas was obtained using an infrared source mounted on a 2-axis translating stage, and the optical efficiency of the KIDs was characterized by observing loads at 294 K and 77 K. We report on the results of these three measurements.

Abstract Image

与 Al KID 相耦合的分层相控阵天线:多波段毫米波/亚毫米波焦平面的可扩展架构
我们介绍了用于毫米/亚毫米波长的双尺度分层相控阵天线动感探测器(KID)的光学特性。我们的 KID 采用块状元件结构,带有平行板电容器和铝电感器。入射光由分层相控阵槽偶极子天线接收,通过片上叠加元件带通滤波器分成 4 个频段(125 千兆赫至 365 千兆赫),并通过微细线传输到不同的 KID。单个像素检测 3 个较高频段(190-365 GHz)的光,四个单个像素的信号相干相加,形成一个较大的像素,检测最低频段(125-175 GHz)的光。我们使用傅立叶变换光谱仪(FTS)测量了带通滤波器的光谱响应,使用安装在双轴平移台上的红外光源获得了相控阵天线的远场波束模式,并通过在 294 K 和 77 K 下观测负载来确定 KID 的光学效率。
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来源期刊
Journal of Low Temperature Physics
Journal of Low Temperature Physics 物理-物理:凝聚态物理
CiteScore
3.30
自引率
25.00%
发文量
245
审稿时长
1 months
期刊介绍: The Journal of Low Temperature Physics publishes original papers and review articles on all areas of low temperature physics and cryogenics, including theoretical and experimental contributions. Subject areas include: Quantum solids, liquids and gases; Superfluidity; Superconductivity; Condensed matter physics; Experimental techniques; The Journal encourages the submission of Rapid Communications and Special Issues.
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