Optical response of epitaxial and granular films of YBa/sub 2/Cu/sub 3/O/sub 7- delta / at temperatures from 25 K to 100 K

Forrester, M. G.; Gottlieb, M.; Gavaler, J. R.; Braginski, A. I.

doi:10.1109/20.92540

Cited by 31 publications

(5 citation statements)

References 10 publications

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“…Although the authors claimed their detector to be mainly non-bolometric (because of a large response near the offset temperature), the reported data also suggested a bolometric response near the temperature where dR/dT is a maximum. Forrester et al [16] were the first to report a bolometric detector with useful performance. An epitaxial YBaCuO 10 × 90 µm 2 microbridge was elaborated on a SrTiO 3 substrate.…”

Section: Thick Substrate Bolometersmentioning

confidence: 99%

“…The D * ∝ τ 1/2 trend is discussed in the text. Label references: HgCdTe [57]; Be1 [22], Br1 [17], Dwi [19], Eid [26], For [16], Leu [15], LiK [25], Rob [28], Ton [21]; Bal [37], Be2 [22,23], Ber [34], Bot [36], Br2 [31], Epi [38], Khr [33], Lak [32], LiH [35], Ver [29]; Bar [51], Foo [50], Joh [49], LiQ [41], Méc [52], Nef [43], Ni1 [46] and Ni2 [48].…”

Section: Synthesismentioning

confidence: 99%

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Recent progress in high-temperature superconductor bolometric detectors: from the mid-infrared to the far-infrared (THz) range

Kreisler

Gaugue

2000

Supercond. Sci. Technol.

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This paper reviews and summarizes the progress in research on high-T c superconducting infrared bolometers since the discovery of high-temperature superconductor (HTSC) materials. After mentioning previous review articles and their particular themes in the introduction, we recall bolometer basics in section 2, where key parameters are presented and design principles summarized. The latter include incident radiation to HTSC thermometer coupling techniques (absorber and antenna approaches) and the thermal balance inside the active region. Section 3 (which forms the largest part of the article) is devoted to medium and near-infrared transition edge bolometers (0.8-20 µm wavelength range), covering both monolithic and composite (absorber coupled) devices. The main landmarks and state-of-the-art devices are described in the order of the increasing degree of technological complexity (thick substrates, thinned or suspended substrates, micromachined silicon-based structures), while keeping in mind the sensitivity versus time response compromise and the aimed competitiveness with photon detectors. The last section treats far-infrared (antenna coupled) hot electron bolometers (HEBs), whose emergence has benefited from newly developed superconducting nanostructures and which are promising candidates for terahertz heterodyne detection. Finally, recent results on both HTSC and (more mature) low-T c HEBs are given.

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Section: Thick Substrate Bolometersmentioning

confidence: 99%

Section: Synthesismentioning

confidence: 99%

Recent progress in high-temperature superconductor bolometric detectors: from the mid-infrared to the far-infrared (THz) range

Kreisler

Gaugue

2000

Supercond. Sci. Technol.

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“…Enomoto and Murakami [2] measured the photoresponse in BaPbo,7Bio 303 and reported encouraging results. Many more photoresponse measurements were reported on HTS, however it was shown by Forrester et al [3] that the results reported were consistent with a bolometric and not a quantum (or photon) detector response. This was disappointing for it has been long recognized that theoretically above 1K quantum detectors offer superior sensitivity over bolometric detectors [4].…”

Section: Introductionmentioning

confidence: 64%

Quantum detectors in superconducting YBCO

Bluzer

Forrester²

1995

IEEE Trans. Appl. Supercond.

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A superconducting quantum detector structure in YBCO is described with a directly coupled SQUID read out circuit. The detector geometry is optimized for maximum photoresponse, with the use of a serpentine pattem. The serpentine pattem reduces quasiparticle diffusion effects and maximizes the photoinduced changes in the kinetic inductance.The operation of this sensor is analyzed in terms of geometry and quasiparticle lifetime to obtain expressions for the signal and noise of this detector. The background limited infrared performance of this detector is calculated to be about 5~1 0 -l~ NEP. The photoresponse is expected to be limited by the superconducting energy gap, about 30-40lm.

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“…The interaction of light with superconducting samples is long known to perturb superconductivity [1][2][3][4] , which can be used as a probing mechanism for optoelectronic applications [5][6][7][8][9][10][11][12][13] . In general, photons of energy greater than the Cooper pair binding energy (2∆) can initiate a chain of pair-breaking events resulting in a deviation of the quasiparticle and pair densities from their equilibrium values.…”

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confidence: 99%

Ultrafast linear kinetic inductive photoresponse of YBa2Cu3O7−δ meander-line structures by photoimpedance measurements

Atikian

Ghamsari

Anlage

et al. 2011

Applied Physics Letters

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We report the experimental demonstration of the linear kinetic-inductive photoresponse of thin-film YBa 2 Cu 3 O 7−δ (YBCO) meander-line structures, where the photoresponse amplitude, full-width-halfmaximum (FWHM), and rise-time are bilinear in the incident optical power and bias current. This bilinear behavior reveals a trade-off between obtaining high responsivity and high speed photodetection. We also report a rise-time as short as 29ps in our photoimpedance measurements.The interaction of light with superconducting samples is long known to perturb superconductivity 1-4 , which can be used as a probing mechanism for optoelectronic applications 5-13 . In general, photons of energy greater than the Cooper pair binding energy (2∆) can initiate a chain of pair-breaking events resulting in a deviation of the quasiparticle and pair densities from their equilibrium values. Typically, these distributions depend on temperature, optical power and wavelength, thermal boundary conditions, and material properties such as electron-electron and electron-phonon interactions times, electron density, coherence length, penetration depth, and geometry 6,14 . While determining the spatial and temporal distribution of quasiparticles and pairs under a time-varying optical illumination is a profound problem in non-equilibrium superconductivity, many of the important concepts of such an interaction for device applications can be captured by means of a much simpler and more phenomenological approach, namely the kinetic inductance model 13 . Within the kinetic inductance model the presence of the superconductive condensate, at a macroscopic level, can be adequately modeled by an additional inductive channel for charge transport. The optically initiated pair breaking mechanism, within this framework, should be interpreted as the spatial and temporal variations of the kinetic inductance and the normal resistance of the superconducting specimen.Many researchers have experimentally studied the kinetic inductive photoresponse of superconducting thin films through photoimpedance measurements 6,15 . In photoimpedance measurements, light induced changes in the microwave impedance of the superconducting structure are measured by an external high-frequency circuit. In its simplest form, the specimen is externally biased with a dc current and connected to a fast oscilloscope in series with a high bandwidth amplifier; absorption of optical photons then changes the impedance of the sample and produces a transient voltage response. A number a) Author to whom correspondence should be addressed. Electronic address: haatikia@maxwell.uwaterloo.ca of previous works have reported photoimpedance measurements on different superconductors mainly concluding that: 1) the resistive photoresponse dominates at temperatures well below the critical temperature (T c ), whereas the kinetic inductive response becomes the main mechanism of photoresponse close to T c ; 2) In the kinetic inductive regime the photoresponse could be very fast, with a rise time as low as 50...

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Optical response of epitaxial and granular films of YBa/sub 2/Cu/sub 3/O/sub 7- delta / at temperatures from 25 K to 100 K

Cited by 31 publications

References 10 publications

Recent progress in high-temperature superconductor bolometric detectors: from the mid-infrared to the far-infrared (THz) range

Recent progress in high-temperature superconductor bolometric detectors: from the mid-infrared to the far-infrared (THz) range

Quantum detectors in superconducting YBCO

Ultrafast linear kinetic inductive photoresponse of YBa2Cu3O7−δ meander-line structures by photoimpedance measurements

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