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Noncollinear parametric fluorescence by chirped quasi-phase matching for monocycle temporal entanglement

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Title: Noncollinear parametric fluorescence by chirped quasi-phase matching for monocycle temporal entanglement
Authors: Tanaka, Akira Browse this author
Okamoto, Ryo Browse this author →KAKEN DB
Lim, Hwan Hong Browse this author
Subashchandran, Shanthi Browse this author
Okano, Masayuki Browse this author
Zhang, Labao Browse this author
Kang, Lin Browse this author
Chen, Jian Browse this author
Wu, Peiheng Browse this author
Hirohata, Toru Browse this author
Kurimura, Sunao Browse this author
Takeuchi, Shigeki Browse this author →KAKEN DB
Issue Date: 5-Nov-2012
Publisher: Optical Society of America
Journal Title: Optics Express
Volume: 20
Issue: 23
Start Page: 25228
End Page: 25238
Publisher DOI: 10.1364/OE.20.025228
PMID: 23187339
Abstract: Quantum entanglement of two photons created by spontaneous parametric downconversion (SPDC) can be used to probe quantum optical phenomena during a single cycle of light. Harris [Opt. Express 98, 063602 (2007)] suggested using ultrabroad parametric fluorescence generated from a quasi-phase-matched (QPM) device whose poling period is chirped. In the Harris's original proposal, it is assumed that the photons are collinearly generated and then spatially separated by frequency filtering. Here, we alternatively propose using noncollinearly generated SPDC. In our numerical calculation, to achieve 1.2 cycle temporal correlation for a 532 nm pump laser, only 10%-chirped device is sufficient when noncollinear condition is applied, while a largely chirped (50%) device is required in collinear condition. We also experimentally demonstrate an octave-spanning (790-1610 nm) noncollinear parametric fluorescence from a 10% chirped MgSLT crystal using both a superconducting nanowire single-photon detector and photomultiplier tube as photon detectors. The observed SPDC bandwidth is 194 THz, which is the largest width achieved to date for a chirped QPM device. From this experimental result, our numerical analysis predicts that the bi-photon can be compressed to 1.2 cycles with appropriate phase compensation.
Rights: © 2012 Optical Society of America
Type: article
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 竹内 繁樹

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