Records |
Author |
Nasr, M. B.; Minaeva, O.; Goltsman, G. N.; Sergienko, A. V.; Saleh, B. E.; Teich, M. C. |
Title |
Submicron axial resolution in an ultrabroadband two-photon interferometer using superconducting single-photon detectors |
Type |
Journal Article |
Year |
2008 |
Publication |
Opt. Express |
Abbreviated Journal |
Opt. Express |
Volume |
16 |
Issue |
19 |
Pages |
15104-15108 |
Keywords |
SSPD, SNSPD |
Abstract |
We generate ultrabroadband biphotons via the process of spontaneous parametric down-conversion in a quasi-phase-matched nonlinear grating that has a linearly chirped poling period. Using these biphotons in conjunction with superconducting single-photon detectors (SSPDs), we measure the narrowest Hong-Ou-Mandel dip to date in a two-photon interferometer, having a full width at half maximum (FWHM) of approximately 5.7 fsec. This FWHM corresponds to a quantum optical coherence tomography (QOCT) axial resolution of 0.85 µm. Our results indicate that a high flux of nonoverlapping biphotons may be generated, as required in many applications of nonclassical light. |
Address |
Departments of Electrical & Computer Engineering and Physics, Quantum Imaging Laboratory, Boston University, Boston, MA 02215, USA. boshra@bu.edu |
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Language |
English |
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Original Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1094-4087 |
ISBN |
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Conference |
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Notes |
PMID:18795048 |
Approved |
no |
Call Number |
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Serial |
1408 |
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Author |
Pernice, W.; Schuck, C.; Li, M.; Goltsman, G. N.; Sergienko, A. V.; Tang, H. X. |
Title |
High speed travelling wave single-photon detectors with near-unity quantum efficiency |
Type |
Journal Article |
Year |
2011 |
Publication |
arXiv |
Abbreviated Journal |
arXiv |
Volume |
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Issue |
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Pages |
1-14 |
Keywords |
SPD |
Abstract |
Ultrafast, high quantum efficiency single photon detectors are among the most sought-after elements in modern quantum optics and quantum communication. Close-to-unity photon detection efficiency is essential for scalable measurement-based quantum computation, quantum key distribution, and loophole-free Bell experiments. However, imperfect modal matching and finite photon absorption rates have usually limited the maximum attainable detection efficiency of single photon detectors. Here we demonstrate a superconducting nanowire detector atop nanophotonic waveguides and achieve single photon detection efficiency up to 94% at telecom wavelengths. Our detectors are fully embedded in a scalable, low loss silicon photonic circuit and provide ultrashort timing jitter of 18ps at multi-GHz detection rates. Exploiting this high temporal resolution we demonstrate ballistic photon transport in silicon ring resonators. The direct implementation of such a detector with high quantum efficiency, high detection speed and low jitter time on chip overcomes a major barrier in integrated quantum photonics. |
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Place of Publication |
arXiv:1108.5299 |
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Call Number |
RPLAB @ gujma @ |
Serial |
661 |
Permanent link to this record |