Abstract

Cold-electron bolometer as a photon-noise-limited detector with on-chip electron self-cooling

Highlights

  • The cold electron bolometer is a SINIS structure, integrated in a planar antenna, designed to absorb terahertz radiation at certain frequency

  • In order to fulfill the requirements of high power load for OLIMPO mission, we connected 192 single Cold-Electron Bolometer (CEB) in one array

  • We have compared the experimental IV-curves with Eq (1) and found that our samples can be fitted very well with the following parameters: critical temperature of superconductor 1.24 K, phonon temperature 310 mK, ∑=1.3 nW/K5/μm[3], normal resistance of Superconductor-Insulator-Normal metal (SIN) junction 1.6 kΩ, Rleak=25 MΩ, RN=50 Ω

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Summary

Introduction

The cold electron bolometer is a SINIS structure, integrated in a planar antenna, designed to absorb terahertz radiation at certain frequency. The array is tuned to have its maximal absorption at 350 GHz. The experiments have shown that the efficiency of absorption for fabricated samples is more than 50%. The cold electron bolometer is well described by the heat balance equation for normal absorber with resistance RN: Pabs + I2RN + V2/Rleak = 2*PCOOL + ∑Ѵ(Te2 - Tph2), (1)

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