Modeling and Measuring the Optical Coupling of Lumped Element Kinetic Inductance Detectors at 120–180 GHz

Rösch, Markus; Mattiocco, F.; Scherer, T.; Siegel, M.; Schüster, K.

doi:10.1109/tap.2012.2231933

Cited by 6 publications

(2 citation statements)

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“…Each pixel is a resonator composed of an interdigitated capacitor and a meander inductor (acting as an absorber) designed with an Hilbert pattern to absorb both polarisations. 3,4 Each array is fabricated on a single 4 inches high resistivity silicon wafer (thickness equal to 250 and 300 µm for 1.15 mm and 2 mm respectively). Pixels are wet etched from a thin aluminium film (18 nm) deposited by e-beam evaporation.…”

Section: The Nika 2 Instrument and The Integration At The 30 M Iram T...mentioning

confidence: 99%

The NIKA2 commissioning campaign: performance and first results

Catalano,

Adam,

Ade

et al. 2016

Preprint

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The New IRAM KID Array 2 (NIKA 2) is a dual-band camera operating with three frequency-multiplexed kilopixels arrays of Lumped Element Kinetic Inductance Detectors (LEKID) cooled at 150 mK. NIKA 2 is designed to observe the intensity and polarisation of the sky at 1.15 and 2.0 mm wavelength from the IRAM 30 m telescope. The NIKA 2 instrument represents a huge step in performance as compared to the NIKA pathfinder instrument, which has already shown state-of-the-art detector and photometric performance. After the commissioning planned to be accomplished at the end of 2016, NIKA 2 will be an IRAM resident instrument for the next ten years or more. NIKA 2 should allow the astrophysical community to tackle a large number of open questions reaching from the role of the Galactic magnetic field in star formation to the discrepancy between cluster-based and CMB-based cosmology possibly induced by the unknown cluster physics. We present an overview of the commissioning phase together with some first results.

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Section: The Nika 2 Instrument and The Integration At The 30 M Iram T...mentioning

confidence: 99%

The NIKA2 commissioning campaign: performance and first results

Catalano,

Adam,

Ade

et al. 2016

Preprint

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“…For horn-coupled LEKIDs, only the inductor part is irradiated and the optical coupling is simply determined by the impedance matching between the inductor and incident wave [16]. Roesch et al [19] have investigated the optical response of a bare LEKIDs array in the 2 mm atmospheric band. In their model, the array consists of a set of periodic pixels only, and the readout line is not considered.…”

Section: Introductionmentioning

confidence: 99%

Optical Response of Lumped-Element Kinetic-Inductance Detector Arrays

Shu¹,

Calvo²,

Goupy³

et al. 2018

IEEE Trans. THz Sci. Technol.

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We present an analysis of the optical response of lumped-element kinetic-inductance detector arrays, based on the NIKA2 1mm array. This array has a dual-polarization sensitive Hilbert inductor for directly absorbing incident photons. We present the optical response calculated from a transmission line model, simulated with HFSS and measured using a Fourier transform spectrometer. We have estimated the energy absorbed by individual component of a pixel, such as the inductor. The difference between the absorption efficiencies is expected to be 20% from the simulations. The Fourier-transform spectroscopy measurement, performed on the actual NIKA2 arrays, validates our simulations. We discuss several possible ways to increase the absorption efficiency. This analysis can be used for optimization of the focal plane layout and can be extended to other kinetic inductance detector array designs in millimeter, sub-millimeter and terahertz frequency bands.

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