SuperSpec, The On-Chip Spectrometer: Improved NEP and Antenna Performance
SuperSpec, The On-Chip Spectrometer: Improved NEP and Antenna Performance
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SuperSpec，片上光谱仪：改进的 NEP 和天线性能
DOI：
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发表时间：
2018
期刊：
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通讯作者：
J. Zmuidzinas
中科院分区：
文献类型：
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作者：
J. Wheeler;S. Hailey;E. Shirokoff;Peter S. Barry;Peter S. Barry;C. M. Bradford;C. M. Bradford;S. Chapman;G. Che;Simon Doyle;J. Glenn;S. Gordon;M. Hollister;Attila Kovacs;H. Leduc;P. Mauskopf;R. McGeehan;C. Mckenney;T. Reck;J. Redford;C. Ross;C. Shiu;C. Tucker;J. Turner;S. Walker;J. Zmuidzinas;J. Zmuidzinas
SuperSpec是一种新的毫米和亚毫米光谱技术。这是一个正在开发的片上光谱仪，用于1毫米大气窗口的高红移星系的多物体、中等分辨率（$$Rsim 300 $$R 300）、大带宽巡天光谱学。该带在红移范围$$z =$$z= 0-4内接近CO梯，在红移范围$$z =$$z= 5-9内接近[CII] 158 $$upmu $$μm线。SuperSpec采用了一种新颖的架构，其中检测器被耦合到一系列谐振滤波器沿着一个单一的微波馈线，而不是使用色散光学。这种结构允许创建一个完整的光谱仪只占用$$sim 10，hbox {cm}^2$sim 10 cm 2的硅，与标准光栅光谱仪相比，尺寸减少了几个数量级。这种小的轮廓使未来的多光束光谱仪器的生产设想为毫米波段有效地测量尘埃星系的红移。SuperSpec合作目前正在推动在2018年秋季部署SuperSpec演示仪器。最新的SuperSpec原型设备的进展，报告通过减少电感体积（2.6 $$upmu hbox {m}^3$$μm3）和一个新的宽带天线的结合增加响应。探测器NEP为3-4 $$ 10 × 10 ~（-18）W/Hz ~（0.5）×10 ~（-18）W/Hz ~（0.5）× 10 ~（-18）W/Hz ~（此外，一种新的宽带双蝶形缝隙天线的波束图和效率测量。
SuperSpec is a new technology for mm and sub-mm spectroscopy. It is an on-chip spectrometer being developed for multi-object, moderate-resolution ($$Rsim 300$$R∼300), large bandwidth survey spectroscopy of high-redshift galaxies for the 1 mm atmospheric window. This band accesses the CO ladder in the redshift range of $$z =$$z= 0–4 and the [CII] 158 $$upmu $$μm line from redshift $$z =$$z= 5–9. SuperSpec employs a novel architecture in which detectors are coupled to a series of resonant filters along a single microwave feedline instead of using dispersive optics. This construction allows for the creation of a full spectrometer occupying only $$sim 10,hbox {cm}^2$$∼10cm2 of silicon, a reduction in size of several orders of magnitude when compared to standard grating spectrometers. This small profile enables the production of future multi-beam spectroscopic instruments envisioned for the millimeter band to measure the redshifts of dusty galaxies efficiently. The SuperSpec collaboration is currently pushing toward the deployment of a SuperSpec demonstration instrument in fall of 2018. The progress with the latest SuperSpec prototype devices is presented; reporting increased responsivity via a reduced inductor volume (2.6 $$upmu hbox {m}^3$$μm3) and the incorporation of a new broadband antenna. A detector NEP of 3–4 $$ imes 10^{-18}$$×10-18 W/Hz$$^{0.5}$$0.5 is obtained, sufficient for background-limited observation on mountaintop sites. In addition, beam maps and efficiency measurements of a new wide-band dual bow-tie slot antenna are shown.