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    Best material for IR absorption

    Thank you, Cthugha! Yes, I want it for a detector. I can cool it down to 4.2K too. Single photon sensitivity is also required. I need the maximum absorption for the thinnest possible film, say a few nano meter. Spectral resolution is not an issue as long as either telecom freqs i.e. 1310 or 1550...
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    Best material for IR absorption

    Hi ThereIam, No, not cell phones. Just detecting few photons of 1550nm or 1310nm photons at the end of an optical fiber. Thanks
  3. P

    Best material for IR absorption

    Thank you, f95toli! In fact, I am interested in telecom wavelengths: 1550 nm or 1310 nm. Since the number of photons are very limited we need to absorb as much as we can.
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    Best material for IR absorption

    Hi all, I am looking for the best material for IR (infra red) absorption, preferably something that I can make it into a thin film; any material that would work from semiconductors, metals to more exotic materials like graphene or... I appreciate your help. Thank you
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    What is kinetic capacitance in superconductors or in solid state in general?

    Thanks, Sambristol! In fact my question on "kinetic capacitance" comes from studying "quantum phase slip". I understand it as a combination of coefficients with the dimension of capacitance in the "effective action" introduced by Golubev and Zaikin; however, I was hoping to get some physical...
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    What is kinetic capacitance in superconductors or in solid state in general?

    What is "kinetic capacitance" in superconductors or in solid state in general? Hi, I would appreciate it if anyone could explain to me what "kinetic capacitance" is, particularly in the context of superconductors or solids. I understand "kinetic inductance" which comes from the kinetic...
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    Kramers-Kronig relations for limited data point

    Hello, I need to measure the complex-optical conductivity of some materials. The problem is that I can only measure the imaginary part of the complex conductivity only for limited wavelengths between 1030 nm and 2300 nm. From Kramers-Kronig relations, we know that the real and imaginary...
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    Replacing cathodoluminesc. by gates

    Hi, I appreciate any help in this regard: People have used cathodoluminescence to study defects in insulators by having energetic electron beam on the defect and observing the luminescence. I want to see if I can do the same thing instead by putting gates around that defect. I can also...
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    Nonlocal electrodynamics of superconductors

    Hello, Conductivity \sigma (\omega, k) in Fourier space is defined by J(\omega, k)= \sigma (\omega, k) A(\omega, k) In most cases the local limit of k\rightarrow 0 is a good approximation particulalry in type I superconductors and HTC superconductors. I am interested in cases...
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    Conductivity from path integral and Kubo formlism

    Thanks, DrDu! I appreciate your help.
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    Conductivity from path integral and Kubo formlism

    Thanks a lot, DrDU! I am just not sure if I understood exactly what you meant for (2) My effective action is complex and non local but fortunately remains quadratic in terms of A and \psi or combination of these two. Therefore I can technically integrate over both A and \psi in the path...
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    Conductivity from path integral and Kubo formlism

    Hi, In calculating the conductivity from the Kubo method j_{\mu}=\int dx' K_{\mu \nu} (x,x') A^{\nu}(x') in literature ( e.g. in Condensed Matter Field Theory by Altland and Simons) you find that K_{\mu \nu}(x,x')= Z^{-1} \frac{\delta^2}{\delta A_{\mu}(x) \delta A_{nu}(x')}...
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    EM response function of the Phase Action of a BCS superconductor

    EM response function of the "Phase Action" of a BCS superconductor Hello, I am looking for a paper in which people calculated the EM response of phase action of A BCS SC. In the book "Condensed Matter Field Theory" by Altland and Simons, on page 393 they mention such a thing in the discussion...
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