TITLE

Superconducting bolometer for far-infrared Fourier transform spectroscopy

AUTHOR(S)
Skidmore, J. T.; Gildemeister, J.; Lee, A. T.; Myers, M. J.; Richards, P. L.
PUB. DATE
January 2003
SOURCE
Applied Physics Letters;1/20/2003, Vol. 82 Issue 3, p469
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A voltage-biased superconducting bolometer with a heat sink temperature of 4.2 K has been developed for Fourier transform spectroscopy in the far infrared. This device is based on a Nb transition edge sensor with T[SUBc] = 8.1 K. It will operate for absorbed infrared power up to 3 × 10[SUP-6] W and has an absorber area of 7 mm[SUP2]. The response is inherently linear and the noise equivalent power (NEP) = 1.2 × 10[SUP-13] W Hz[SUP-1/2] is dominated by thermal fluctuation noise. This NEP is at least a factor 10 better than that expected for a conventional 4.2 K semiconductor bolometer which is optimized for 1% saturation at the same infrared power. The optical response time τ = 1.2 ms is dominated by the internal thermalization time. A smaller version of this bolometer could be useful for diffraction-limited spectroscopy of small samples throughout the infrared. Estimates suggest that values of detectivity D* > 10[SUP11] cm Hz[SUP+1/2] W[SUP-1] and time constants approaching 270 μs could be achieved.
ACCESSION #
8926040

 

Related Articles

  • Comments on ‘‘Improved algorithm for the discrete Fourier transform’’ [Rev. Sci. Instrum. 56, 2325 (1985)]. Sorella, S. // Review of Scientific Instruments;Apr87, Vol. 58 Issue 4, p714 

    It is shown that in the paper written by M. Froeyen and L. Hellemans [Rev. Sci. Instrum. 56, 2325 (1985)], the algorithm POL2[sup *]FFT proposed by myself and S. K. Ghosh [S. Sorella and S. K. Ghosh, Rev. Sci. Instrum. 55, 1348 (1984)] is used in a incorrect way, because the original paper was...

  • New approach to the analysis of negative magnetostriction in two-dimensional structures. Min�kov, G. M.; Negashev, S. A.; Rut, O. �.; Germanenko, A. V.; Khrykin, O. I.; Shashkin, V. I.; Danil�tsev, V. M. // Semiconductors;Aug99, Vol. 33 Issue 8, p898 

    It is shown that the Fourier transform of the negative magnetoresistance associated with the interference correction to the conductivity contains information about the distribution function of the closed trajectories with respect to their areas and about the dependence of the length of the...

  • Extending a continuous scan Fourier transform spectrometer for time-resolved Fourier transform spectroscopy with <0.5 cm-1 spectral and <10 ns time resolution in the visible region Lindner, Jorg; Stahlhut, Oliver; Wilhelm, Ralf; Ermisch, Karsten // Review of Scientific Instruments;Apr98, Vol. 69 Issue 4, p1629 

    Describes the extension of continuous scan Fourier transform spectrometer (FTS) for time-resolved FTS (TS-FTS). Characteristics of the FTS; Realization of the data acquisition and experimental setup; Examples of time-resolved measurements; Signal-to-noise behavior of TS-FTS.

  • Pseudorotation in tetrahydrofuran...HF heterodimer. Alonso, J. L.; López, J. C.; Blanco, S.; Lesarri, A.; Lorenzo, F. J. // Journal of Chemical Physics;8/15/2000, Vol. 113 Issue 7 

    Seven isotopomers of the hydrogen-bonded heterodimer tetrahydrofuran...HF have been investigated in the frequency range 6-18 GHz using molecular-beam Fourier transform microwave spectroscopy. The rotational spectra of C[sub 4]H[sub 8]O...HF and C[sub 4]H[sub 8]O...DF exhibit small tunneling...

  • Researchers demonstrate optics-free pixel array.  // Vision Systems Design;Aug2011, Vol. 16 Issue 8, p6 

    The article reports on the development of Planar Fourier Capture Array (PFCA) chip-scale sensor for far field imaging by researchers at Cornell University in Ithaca, New York.

  • Determination of the structure of HBr Dr. Wei Chen; Walker, A.R. Hight; Novick, Stewart E.; Fu-Ming Tao // Journal of Chemical Physics;4/15/1997, Vol. 106 Issue 15, p6240 

    Investigates the structure and dynamics of the weakly bound complex of four bromine isotopomers using pulsed-jet Fourier transform microwave spectroscopy. Calculation of the equilibrium geometry, intermolecular energy and vibrational force constants for the dimer; Wide amplitude bending motions...

  • Submillimeter-wave Fourier transform spectroscopy of biological macromolecules. Globus, T. R.; Woolard, D. L.; Samuels, A. C.; Gelmont, B. L.; Hesler, J.; Crowe, T. W.; Bykhovskaia, M. // Journal of Applied Physics;May2002, Vol. 91 Issue 9, p6105 

    In this article we report experimental results on Fourier-transform infrared spectroscopy of deoxyribonucleic acid (DNA) macromolecules and related biological materials in the submillimeter range (i.e., ∼10–500 cm-1). Film samples made from commercial DNA fibers, polyadenylic acid...

  • Pure rotational spectrum, quadrupole coupling constants and structure of the dimer of pyrrole. Columberg, G.; Bauder, A. // Journal of Chemical Physics;1/8/1997, Vol. 106 Issue 2, p504 

    Focuses on the identification and measurement of rotational transitions of a pyrrole dimer using a pulsed-nozzle Fourier-transform microwave spectrometer. Number of isotopomers analyzed; Absence of additional splittings from large amplitude motions; Consistency of observed rotational constants...

  • Hyperfine constants of bromine and iodine monofluoride. Müller, Holger S. P.; Gerry, Michael C. L. // Journal of Chemical Physics;7/8/1995, Vol. 103 Issue 2, p577 

    The J′-J″=1-0 rotational transitions of 79BrF, 81BrF, and IF have been reinvestigated in the ground and first excited vibrational states using microwave Fourier transform spectroscopy. For IF, lines were also detected in the second excited vibrational state. Bromine and iodine...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics