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Anant, Vikas; Kerman, Andrew J.; Dauler, Eric A.; Yang, Joel K. W.; Rosfjord, Krist.ine M.; Berggren, Karl K. |
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Title |
Optical properties of superconducting nanowire single-photon detectors |
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Journal Article |
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Year |
2008 |
Publication |
Optics Express |
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Opt. Express |
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16 |
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14 |
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10750 |
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1094-4087 |
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RPLAB @ s @ |
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413 |
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Author |
Rosfjord, Kristine M.; Yang, Joel K. W.; Dauler, Eric A.; Kerman, Andrew J.; Vikas Anant; Voronov, Boris M.; Gol'tsman, Gregory N.; Berggren, Karl K. |
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Title |
Nanowire Single-photon detector with an integrated optical cavity and anti-reflection coating |
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Journal Article |
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Year |
2006 |
Publication |
Opt. Express |
Abbreviated Journal |
Opt. Express |
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14 |
Issue |
2 |
Pages |
527-534 |
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Keywords |
SSPD, SNSPD, cavity |
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We have fabricated and tested superconducting single-photon detectors and demonstrated detection efficiencies of 57% at 1550-nm wavelength and 67% at 1064 nm. In addition to the peak detection efficiency, a median detection efficiency of 47.7% was measured over 132 devices at 1550 nm. These measurements were made at 1.8K, with each device biased to 97.5% of its critical current. The high detection efficiencies resulted from the addition of an optical cavity and anti-reflection coating to a nanowire photodetector, creating an integrated nanoelectrophotonic device with enhanced performance relative to the original device. Here, the testing apparatus and the fabrication process are presented. The detection efficiency of devices before and after the addition of optical elements is also reported. |
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1094-4087 |
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PMID:19503367 |
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388 |
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Kerman, Andrew J.; Yang, Joel K. W.; Molnar, Richard J.; Dauler, Eric A.; Berggren, Karl K. |
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Title |
Electrothermal feedback in superconducting nanowire single-photon detectors |
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Journal Article |
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2009 |
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Phys. Rev. B |
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Phys. Rev. B |
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79 |
Issue |
10 |
Pages |
4 |
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Keywords |
SNSPD |
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We investigate the role of electrothermal feedback in the operation of superconducting nanowire single-photon detectors (SNSPDs). It is found that the desired mode of operation for SNSPDs is only achieved if this feedback is unstable, which happens naturally through the slow electrical response associated with their relatively large kinetic inductance. If this response is sped up in an effort to increase the device count rate, the electrothermal feedback becomes stable and results in an effect known as latching, where the device is locked in a resistive state and can no longer detect photons. We present a set of experiments which elucidate this effect and a simple model which quantitatively explains the results. |
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RPLAB @ gujma @ |
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680 |
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Hu, Xiaolong; Dauler, Eric A.; Kerman, Andrew J.; Yang, Joel K. W.; White, James E.; Herder, Charles H.; Berggren, Karl K. |
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Title |
Using surface plasmons to enhance the speed and efficiency of superconducting nanowire single-photon detectors |
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Conference Article |
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Year |
2009 |
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Proceedings of the Conference on Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference |
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Proc of Conf. on Lasers and El.-Opt. |
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1-2 |
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Keywords |
optical antennas |
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We report our design and fabrication of superconducting nanowire single-photon detectors integrated with gold plasmonic nanostructures, which can enhance the absorption of TM-polarized light, and can enlarge the effective area without sacrificing detector speed. |
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RPLAB @ gujma @ |
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744 |
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