[ { "id": "authors:g63x7-wmz50", "collection": "authors", "collection_id": "g63x7-wmz50", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20211130-215754289", "type": "article", "title": "Probing material absorption and optical nonlinearity of integrated photonic materials", "author": [ { "family_name": "Gao", "given_name": "Maodong", "orcid": "0000-0002-7791-0008", "clpid": "Gao-Maodong" }, { "family_name": "Yang", "given_name": "Qi-Fan", "orcid": "0000-0002-7036-1712", "clpid": "Yang-Qi-Fan" }, { "family_name": "Ji", "given_name": "Qing-Xin", "orcid": "0000-0002-6336-8350", "clpid": "Ji-Qing-Xin" }, { "family_name": "Wang", "given_name": "Heming", "orcid": "0000-0003-3861-0624", "clpid": "Wang-Heming" }, { "family_name": "Wu", "given_name": "Lue", "orcid": "0000-0002-7503-7057", "clpid": "Wu-Lue" }, { "family_name": "Shen", "given_name": "Boqiang", "orcid": "0000-0003-0697-508X", "clpid": "Shen-Boqiang" }, { "family_name": "Liu", "given_name": "Junqiu", "orcid": "0000-0003-2405-6028", "clpid": "Liu-Junqiu" }, { "family_name": "Huang", "given_name": "Guanhao", "clpid": "Huang-Guanhao" }, { "family_name": "Chang", "given_name": "Lin", "orcid": "0000-0001-5311-3349", "clpid": "Chang-Lin" }, { "family_name": "Xie", "given_name": "Weiqiang", "clpid": "Xie-Weiqiang" }, { "family_name": "Yu", "given_name": "Su-Peng", "orcid": "0000-0003-1348-7447", "clpid": "Yu-Su-Peng" }, { "family_name": "Papp", "given_name": "Scott B.", "orcid": "0000-0001-8290-7076", "clpid": "Papp-Scott-B" }, { "family_name": "Bowers", "given_name": "John E.", "orcid": "0000-0003-4270-8296", "clpid": "Bowers-John-E" }, { "family_name": "Kippenberg", "given_name": "Tobias J.", "orcid": "0000-0002-3408-886X", "clpid": "Kippenberg-Tobias-J" }, { "family_name": "Vahala", "given_name": "Kerry J.", "orcid": "0000-0003-1783-1380", "clpid": "Vahala-K-J" } ], "abstract": "Optical microresonators with high quality (Q) factors are essential to a wide range of integrated photonic devices. Steady efforts have been directed towards increasing microresonator Q factors across a variety of platforms. With success in reducing microfabrication process-related optical loss as a limitation of Q, the ultimate attainable Q, as determined solely by the constituent microresonator material absorption, has come into focus. Here, we report measurements of the material-limited Q factors in several photonic material platforms. High-Q microresonators are fabricated from thin films of SiO\u2082, Si\u2083N\u2084, Al_(0.2)Ga_(0.8)As, and Ta\u2082O\u2085. By using cavity-enhanced photothermal spectroscopy, the material-limited Q is determined. The method simultaneously measures the Kerr nonlinearity in each material and reveals how material nonlinearity and ultimate Q vary in a complementary fashion across photonic materials. Besides guiding microresonator design and material development in four material platforms, the results help establish performance limits in future photonic integrated systems.", "doi": "10.1038/s41467-022-30966-5", "pmcid": "PMC9184588", "issn": "2041-1723", "publisher": "Nature Publishing Group", "publication": "Nature Communications", "publication_date": "2022-06-09", "volume": "13", "pages": "Art. No. 3323" }, { "id": "authors:skm7t-gwp41", "collection": "authors", "collection_id": "skm7t-gwp41", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200409-170816855", "type": "article", "title": "The Integration of Photonic Crystal Waveguides with Atom Arrays in Optical Tweezers", "author": [ { "family_name": "Luan", "given_name": "Xingsheng", "clpid": "Luan-Xingsheng" }, { "family_name": "B\u00e9guin", "given_name": "Jean-Baptiste", "clpid": "B\u00e9guin-J-B-S" }, { "family_name": "Burgers", "given_name": "Alex P.", "clpid": "Burgers-A-P" }, { "family_name": "Qin", "given_name": "Zhongzhong", "clpid": "Qin-Zhongzhong" }, { "family_name": "Yu", "given_name": "Su-Peng", "clpid": "Yu-Su-Peng" }, { "family_name": "Kimble", "given_name": "Harry J.", "clpid": "Kimble-H-J" } ], "abstract": "Integrating nanophotonics and cold atoms has drawn increasing interest in recent years due to diverse applications in quantum information science and the exploration of quantum many\u2010body physics. For example, dispersion\u2010engineered photonic crystal waveguides (PCWs) permit not only stable trapping and probing of ultracold neutral atoms via interactions with guided\u2010mode light, but also the possibility to explore the physics of strong, photon\u2010mediated interactions between atoms, as well as atom\u2010mediated interactions between photons. While diverse theoretical opportunities involving atoms and photons in 1D and 2D nanophotonic lattices have been analyzed, a grand challenge remains the experimental integration of PCWs with ultracold atoms. Here, an advanced apparatus that overcomes several significant barriers to current experimental progress is described, with the goal of achieving strong quantum interactions of light and matter by way of single\u2010atom tweezer arrays strongly coupled to photons in 1D and 2D PCWs. Principal technical advances relate to efficient free\u2010space coupling of light to and from guided modes of PCWs, silicate bonding of silicon chips within small glass vacuum cells, and deterministic, mechanical delivery of single\u2010atom tweezer arrays to the near fields of photonic crystal waveguides.", "doi": "10.1002/qute.202000008", "issn": "2511-9044", "publisher": "Wiley", "publication": "Advanced Quantum Technologies", "publication_date": "2020-11", "series_number": "11", "volume": "3", "issue": "11", "pages": "Art. No. 2000008" }, { "id": "authors:w4rpn-gm294", "collection": "authors", "collection_id": "w4rpn-gm294", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200316-150529152", "type": "article", "title": "Ultra-efficient frequency comb generation in AlGaAs-on-insulator microresonators", "author": [ { "family_name": "Chang", "given_name": "Lin", "clpid": "Chang-Lin" }, { "family_name": "Xie", "given_name": "Weiqiang", "clpid": "Xie-Weiqiang" }, { "family_name": "Shu", "given_name": "Haowen", "clpid": "Shu-Haowen" }, { "family_name": "Yang", "given_name": "Qi-Fan", "orcid": "0000-0002-7036-1712", "clpid": "Yang-Qi-Fan" }, { "family_name": "Shen", "given_name": "Boqiang", "orcid": "0000-0003-0697-508X", "clpid": "Shen-Boqiang" }, { "family_name": "Boes", "given_name": "Andreas", "orcid": "0000-0001-8443-3396", "clpid": "Boes-Andreas" }, { "family_name": "Peters", "given_name": "Jon D.", "clpid": "Peters-Jon-D" }, { "family_name": "Jin", "given_name": "Warren", "clpid": "Jin-Warren" }, { "family_name": "Xiang", "given_name": "Chao", "orcid": "0000-0002-7081-0346", "clpid": "Xiang-Chao" }, { "family_name": "Liu", "given_name": "Songtao", "orcid": "0000-0001-9815-3678", "clpid": "Liu-Songtao" }, { "family_name": "Moille", "given_name": "Gregory", "clpid": "Moille-Gregory" }, { "family_name": "Yu", "given_name": "Su-Peng", "orcid": "0000-0003-1348-7447", "clpid": "Yu-Su-Peng" }, { "family_name": "Wang", "given_name": "Xingjun", "clpid": "Wang-Xingjun" }, { "family_name": "Srinivasan", "given_name": "Kartik", "orcid": "0000-0003-2589-3688", "clpid": "Srinivasan-Kartik" }, { "family_name": "Papp", "given_name": "Scott B.", "orcid": "0000-0001-8290-7076", "clpid": "Papp-Scott-B" }, { "family_name": "Vahala", "given_name": "Kerry", "orcid": "0000-0003-1783-1380", "clpid": "Vahala-K-J" }, { "family_name": "Bowers", "given_name": "John E.", "orcid": "0000-0003-4270-8296", "clpid": "Bowers-John-E" } ], "abstract": "Recent advances in nonlinear optics have revolutionized integrated photonics, providing on-chip solutions to a wide range of new applications. Currently, state of the art integrated nonlinear photonic devices are mainly based on dielectric material platforms, such as Si\u2083N\u2084 and SiO\u2082. While semiconductor materials feature much higher nonlinear coefficients and convenience in active integration, they have suffered from high waveguide losses that prevent the realization of efficient nonlinear processes on-chip. Here, we challenge this status quo and demonstrate a low loss AlGaAs-on-insulator platform with anomalous dispersion and quality (Q) factors beyond 1.5\u2009\u00d7\u200910\u2076. Such a high quality factor, combined with high nonlinear coefficient and small mode volume, enabled us to demonstrate a Kerr frequency comb threshold of only \u223c36\u2009\u00b5W in a resonator with a 1\u2009THz free spectral range, \u223c100 times lower compared to that in previous semiconductor platforms. Moreover, combs with broad spans (>250\u2009nm) have been generated with a pump power of \u223c300\u2009\u00b5W, which is lower than the threshold power of state-of the-art dielectric micro combs. A soliton-step transition has also been observed for the first time in an AlGaAs resonator.", "doi": "10.1038/s41467-020-15005-5", "pmcid": "PMC7067760", "issn": "2041-1723", "publisher": "Nature Publishing Group", "publication": "Nature Communications", "publication_date": "2020-03-12", "volume": "11", "pages": "Art. No. 1331" }, { "id": "authors:xp9pz-9g610", "collection": "authors", "collection_id": "xp9pz-9g610", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200130-150153223", "type": "article", "title": "An advanced apparatus for the integration of nanophotonics and cold atoms", "author": [ { "family_name": "Baptiste", "given_name": "J.-B.", "clpid": "Baptiste-J-B" }, { "family_name": "Burgers", "given_name": "A. P.", "clpid": "Burgers-A-P" }, { "family_name": "Luan", "given_name": "X.", "clpid": "Luan-Xingsheng" }, { "family_name": "Qin", "given_name": "Z.", "clpid": "Qin-Zhongzhong" }, { "family_name": "Yu", "given_name": "S. P.", "orcid": "0000-0003-1348-7447", "clpid": "Yu-Su-Peng" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "We combine nanophotonics and cold atom research in a new apparatus enabling the delivery of single-atom tweezer arrays in the vicinity of photonic crystal waveguides.", "doi": "10.1364/optica.384408", "issn": "2334-2536", "publisher": "Optical Society of America", "publication": "Optica", "publication_date": "2020-01-20", "series_number": "1", "volume": "7", "issue": "1", "pages": "1-2" }, { "id": "authors:ymgk2-0p350", "collection": "authors", "collection_id": "ymgk2-0p350", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190426-091633868", "type": "article", "title": "Two-Dimensional Photonic Crystals for Engineering Atom-Light Interactions", "author": [ { "family_name": "Yu", "given_name": "Su-Peng", "orcid": "0000-0003-1348-7447", "clpid": "Yu-Su-Peng" }, { "family_name": "Muniz", "given_name": "Juan A.", "clpid": "Muniz-Juan-A" }, { "family_name": "Hung", "given_name": "Chen-Lung", "clpid": "Hung-Chen-Lung" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "We present a two-dimensional (2D) photonic crystal system for interacting with cold cesium (Cs) atoms. The band structures of the 2D photonic crystals are predicted to produce unconventional atom-light interaction behaviors, including anisotropic emission, suppressed spontaneous decay and photon mediated atom-atom interactions controlled by the position of the atomic array relative to the photonic crystal. An optical conveyor technique is presented for continuously loading atoms into the desired trapping positions with optimal coupling to the photonic crystal. The device configuration also enables application of optical tweezers for controlled placement of atoms. Devices can be fabricated reliably from a 200nm silicon nitride device layer using a lithography-based process, producing predicted optical properties in transmission and reflection measurements. These 2D photonic crystal devices can be readily deployed to experiments for many-body physics with neutral atoms, and engineering of exotic quantum matter.", "doi": "10.1073/pnas.1822110116", "pmcid": "PMC6600959", "issn": "0027-8424", "publisher": "National Academy of Sciences", "publication": "Proceedings of the National Academy of Sciences of the United States of America", "publication_date": "2019-06-25", "series_number": "26", "volume": "116", "issue": "26", "pages": "12743-12751" }, { "id": "authors:hce9r-5cz89", "collection": "authors", "collection_id": "hce9r-5cz89", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160901-072818299", "type": "article", "title": "Atom\u2013atom interactions around the band edge of a photonic crystal waveguide", "author": [ { "family_name": "Hood", "given_name": "Jonathan D.", "clpid": "Hood-Jonathan-D" }, { "family_name": "Goban", "given_name": "Akihisa", "clpid": "Goban-Akihisa" }, { "family_name": "Asenjo-Garcia", "given_name": "Ana", "orcid": "0000-0001-9850-5610", "clpid": "Asenjo-Garcia-Ana" }, { "family_name": "Lu", "given_name": "Mingwu", "clpid": "Lu-Mingwu" }, { "family_name": "Yu", "given_name": "Su-Peng", "orcid": "0000-0003-1348-7447", "clpid": "Yu-Su-Peng" }, { "family_name": "Chang", "given_name": "Darrick E.", "orcid": "0000-0002-5426-7339", "clpid": "Chang-Darrick-E" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "Tailoring the interactions between quantum emitters and single photons constitutes one of the cornerstones of quantum optics. Coupling a quantum emitter to the band edge of a photonic crystal waveguide (PCW) provides a unique platform for tuning these interactions. In particular, the cross-over from propagating fields E(x)\u221de \u00b1^(ik_xx) outside the bandgap to localized fields E(x)\u221de^(\u2212\u03ba_x|x|) within the bandgap should be accompanied by a transition from largely dissipative atom\u2013atom interactions to a regime where dispersive atom\u2013atom interactions are dominant. Here, we experimentally observe this transition by shifting the band edge frequency of the PCW relative to the D_1 line of atomic cesium for N =3.0\u00b10.5 atoms trapped along the PCW. Our results are the initial demonstration of this paradigm for coherent atom\u2013atom interactions with low dissipation into the guided mode.", "doi": "10.1073/pnas.1603788113", "pmcid": "PMC5035845", "issn": "0027-8424", "publisher": "National Academy of Sciences", "publication": "Proceedings of the National Academy of Sciences of the United States of America", "publication_date": "2016-09-20", "series_number": "38", "volume": "113", "issue": "38", "pages": "10507-10512" }, { "id": "authors:rs9tj-vq054", "collection": "authors", "collection_id": "rs9tj-vq054", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150317-085504145", "type": "article", "title": "Superradiance for atoms trapped along a photonic crystal waveguide", "author": [ { "family_name": "Goban", "given_name": "A.", "clpid": "Goban-Akihisa" }, { "family_name": "Hung", "given_name": "C.-L.", "orcid": "0000-0002-6879-3639", "clpid": "Hung-Chao-Ling" }, { "family_name": "Hood", "given_name": "J. D.", "clpid": "Hood-J-D" }, { "family_name": "Yu", "given_name": "S.-P.", "orcid": "0000-0003-1348-7447", "clpid": "Yu-Su-Peng" }, { "family_name": "Muniz", "given_name": "J. A.", "clpid": "Muniz-J-A" }, { "family_name": "Painter", "given_name": "O.", "orcid": "0000-0002-1581-9209", "clpid": "Painter-O" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "We report observations of superradiance for atoms trapped in the near field of a photonic crystal waveguide (PCW). By fabricating the PCW with a band edge near the D_1 transition of atomic cesium, strong interaction is achieved between trapped atoms and guided-mode photons. Following short-pulse excitation, we record the decay of guided-mode emission and find a superradiant emission rate scaling as \u0393_(SR)\u221dN\u0393_(1D) for average atom number 0.19\u2272N \u22722.6 atoms, where \u0393_(1D)/\u0393\u2032=1.0\u00b10.1 is the peak single-atom radiative decay rate into the PCW guided mode, and \u0393\u2032 is the radiative decay rate into all the other channels. These advances provide new tools for investigations of photon-mediated atom-atom interactions in the many-body regime.", "doi": "10.1103/PhysRevLett.115.063601", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2015-08-05", "series_number": "6", "volume": "115", "issue": "6", "pages": "Art. No. 063601" }, { "id": "authors:8e8bx-54847", "collection": "authors", "collection_id": "8e8bx-54847", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140107-143746870", "type": "article", "title": "Atom-Light Interactions in Photonic Crystals", "author": [ { "family_name": "Goban", "given_name": "A.", "clpid": "Goban-Akihisa" }, { "family_name": "Hung", "given_name": "C.-L.", "orcid": "0000-0002-6879-3639", "clpid": "Hung-Chao-Ling" }, { "family_name": "Yu", "given_name": "S.-P.", "orcid": "0000-0003-1348-7447", "clpid": "Yu-Su-Peng" }, { "family_name": "Hood", "given_name": "J. D.", "clpid": "Hood-J-D" }, { "family_name": "Muniz", "given_name": "J. A.", "clpid": "Muniz-J-A" }, { "family_name": "Lee", "given_name": "J. H.", "clpid": "Lee-Jeff-H" }, { "family_name": "Martin", "given_name": "M. J.", "clpid": "Martin-M-J" }, { "family_name": "McClung", "given_name": "A. C.", "clpid": "McClung-A-C" }, { "family_name": "Choi", "given_name": "K. S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Chang", "given_name": "D. E.", "clpid": "Chang-Dong-Eui" }, { "family_name": "Painter", "given_name": "O.", "orcid": "0000-0002-1581-9209", "clpid": "Painter-O" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "The integration of nanophotonics and atomic physics has been a long-sought goal that would open new frontiers for optical physics, including novel quantum transport and many-body phenomena with photon-mediated atomic interactions. Reaching this goal requires surmounting diverse challenges in nanofabrication and atomic manipulation. Here we report the development of a novel integrated optical circuit with a photonic crystal capable of both localizing and interfacing atoms with guided photons. Optical bands of a photonic crystal waveguide are aligned with selected atomic transitions. From reflection spectra measured with average atom number N = 1.1 \u00b1 0.4, we infer that atoms are localized within the waveguide by optical dipole forces. The fraction of single-atom radiative decay into the waveguide is \u0393_(1D)/\u0393'\u2243(0.32\u00b10.08), where \u0393_(1D) is the rate of emission into the guided mode and \u0393' is the decay rate into all other channels. \u0393_(1D)/\u0393\u2032 is unprecedented in all current atom\u2013photon interfaces.", "doi": "10.1038/ncomms4808", "issn": "2041-1723", "publisher": "Nature Publishing Group", "publication": "Nature Communications", "publication_date": "2014-05", "series_number": "5", "volume": "5", "issue": "5", "pages": "Art. No. 3808" }, { "id": "authors:jbagw-kqn97", "collection": "authors", "collection_id": "jbagw-kqn97", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140219-085856700", "type": "article", "title": "Nanowire photonic crystal waveguides for single-atom trapping and strong light-matter interactions", "author": [ { "family_name": "Yu", "given_name": "S.-P.", "orcid": "0000-0003-1348-7447", "clpid": "Yu-Su-Peng" }, { "family_name": "Hood", "given_name": "J. D.", "clpid": "Hood-J-D" }, { "family_name": "Muniz", "given_name": "J. A.", "clpid": "Muniz-J-A" }, { "family_name": "Martin", "given_name": "M. J.", "clpid": "Martin-M-J" }, { "family_name": "Norte", "given_name": "Richard", "clpid": "Norte-R" }, { "family_name": "Hung", "given_name": "C.-L.", "orcid": "0000-0002-6879-3639", "clpid": "Hung-Chao-Ling" }, { "family_name": "Meenehan", "given_name": "Se\u00e1n M.", "clpid": "Meenehan-S-M" }, { "family_name": "Cohen", "given_name": "Justin D.", "clpid": "Cohen-J-D" }, { "family_name": "Painter", "given_name": "Oskar", "orcid": "0000-0002-1581-9209", "clpid": "Painter-O" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "We present a comprehensive study of dispersion-engineered nanowire photonic crystal waveguides suitable for experiments in quantum optics and atomic physics with optically trapped atoms. Detailed design methodology and specifications are provided, as are the processing steps used to create silicon nitride waveguides of low optical loss in the near-IR. Measurements of the waveguide optical properties and power-handling capability are also presented.", "doi": "10.1063/1.4868975", "issn": "0003-6951", "publisher": "American Institute of Physics", "publication": "Applied Physics Letters", "publication_date": "2014-03-17", "series_number": "11", "volume": "104", "issue": "11", "pages": "Art. No. 111103" } ]