| 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 |
| URI: | http://hdl.handle.net/2115/51057 |
| 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)
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