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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 64, Iss. 6 — Jun. 1, 1974
  • pp: 820–822

Improvements on "Low-temperature dielectric bolometer"

W. N. Lawless, Ray Radebaugh, and J. D. Siegwarth  »View Author Affiliations

JOSA, Vol. 64, Issue 6, pp. 820-822 (1974)

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This paper corrects a definitional error in the previous paper on this topic and reports a considerably better dielectric material for this type of detector (i.e., d I n ε/d T values as large as 30% K-1 in the range 0.3 to 10 K). Computed responsivity (times the square root of the detector area) based on this material varies from 6 × 106 to 2 × 104 V⋅W-1 cm for reservoir temperatures between 0.3 and 10 K. The corresponding variation of the detectivity is from 2 × 1014 to 1 × 1011 cm ⋅ W-1 ⋅ Hz½.

W. N. Lawless, Ray Radebaugh, and J. D. Siegwarth, "Improvements on "Low-temperature dielectric bolometer"," J. Opt. Soc. Am. 64, 820-822 (1974)

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  1. W. N. Lawless, J. Opt. Soc. Am. 62, 1449 (1972).
  2. W. N. Lawless, Rev. Sci. Instr. 42, 561 (1971); W. N. Lawless, R. Radebaugh, and R. J. Soulen, Rev. Sci. Instr. 42, 567 (1971).
  3. Note that the capacitance C in Eq. (3) does not depend on the detector area but rather on the arrangement of the electrodes on that area.
  4. See Refs. 2 for the experimental methods for these measurements.
  5. R. C. Zeller and R. O. Pohl, Phys. Rev. B 4, 2029 (1971).
  6. These three refinements were ignored in arriving at x*. The reason for discussing x* was to arrive at the high-temperature restriction on T0; at the higher temperature, the refinements are not important.
  7. Strictly speaking, α was assumed temperature independent between T0 and TB, in solving the heat-balance differential equation (Ref. 1). The maximization scheme here involves a at TB, which has the effect of slightly overestimating (≲1%) rA½ below 1 K and underestimating rA½ above 1 K.
  8. The corresponding Eq. (2) in Ref. 1 contains errors, in that the resistance R is missing from the first term and the bandwidth Δƒc should be deleted from all three terms.
  9. L. G. Rubin and W. N. Lawless, Rev. Sci. Instr. 42, 571 (1971).

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