[ { "id": "authors:n06rx-xtf57", "collection": "authors", "collection_id": "n06rx-xtf57", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110503-134956468", "type": "article", "title": "Size tunable visible and near-infrared photoluminescence from vertically etched silicon quantum dots", "author": [ { "family_name": "Walavalkar", "given_name": "Sameer S.", "orcid": "0000-0002-7628-9600", "clpid": "Walavalkar-S-S" }, { "family_name": "Homyk", "given_name": "Andrew P.", "clpid": "Homyk-A-P" }, { "family_name": "Hofmann", "given_name": "Carrie E.", "orcid": "0000-0002-3945-3379", "clpid": "Hofmann-Carrie-Elizabeth" }, { "family_name": "Henry", "given_name": "M. David", "orcid": "0000-0002-5201-0644", "clpid": "Henry-M-D" }, { "family_name": "Shin", "given_name": "Claudia", "clpid": "Shin-Claudia" }, { "family_name": "Atwater", "given_name": "Harry A.", "orcid": "0000-0001-9435-0201", "clpid": "Atwater-H-A" }, { "family_name": "Scherer", "given_name": "Axel", "orcid": "0000-0002-2160-9064", "clpid": "Scherer-A" } ], "abstract": "Corrugated etching techniques were used to fabricate size-tunable silicon quantum dots that luminesce under photoexcitation, tunable over the visible and near infrared. By using the fidelity of lithographic patterning and strain limited, self-terminating oxidation, uniform arrays of pillar containing stacked quantum dots as small as 2 nm were patterned. Furthermore, an array of pillars, with multiple similar sized quantum dots on each pillar, was fabricated and tested. The photoluminescence displayed a multiple, closely peaked emission spectra corresponding to quantum dots with a narrow size distribution. Similar structures can provide quantum confinement effects for future nanophotonic and nanoelectronic devices.", "doi": "10.1063/1.3580768", "issn": "0003-6951", "publisher": "American Institute of Physics", "publication": "Applied Physics Letters", "publication_date": "2011-04-11", "series_number": "15", "volume": "98", "issue": "15", "pages": "Art. No. 153114" }, { "id": "authors:zy85s-m4297", "collection": "authors", "collection_id": "zy85s-m4297", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110329-085133816", "type": "article", "title": "Enhancing the Radiative Rate in III-V Semiconductor Plasmonic Core-Shell Nanowire Resonators", "author": [ { "family_name": "Hofmann", "given_name": "Carrie E.", "orcid": "0000-0002-3945-3379", "clpid": "Hofmann-Carrie-Elizabeth" }, { "family_name": "Garc\u00eda de Abajo", "given_name": "F. Javier", "clpid": "Garc\u00eda-de-Abajo-F-J" }, { "family_name": "Atwater", "given_name": "Harry A.", "orcid": "0000-0001-9435-0201", "clpid": "Atwater-H-A" } ], "abstract": "We investigate the radiative properties of plasmonic core-shell nanowire resonators and, using boundary element method calculations,\n demonstrate enhanced radiative decay rate by up to 3500 times in\n nanoscale compound semi-conductor/metal cavities. Calculation of the\n local density of optical states enables identification of new types of\n modes in cavities with mode volumes on the order of\n 10^(-4)(\u03bb/n)^3. These modes dramatically enhance the radiative\n decay rate and significantly modify the polarization of far-field\n emission.", "doi": "10.1021/nl102878b", "issn": "1530-6984", "publisher": "American Chemical Society", "publication": "Nano Letters", "publication_date": "2011-02", "series_number": "2", "volume": "11", "issue": "2", "pages": "372-376" }, { "id": "authors:khv3h-t9x46", "collection": "authors", "collection_id": "khv3h-t9x46", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20101206-110602750", "type": "article", "title": "Tunable Visible and Near-IR Emission from Sub-10 nm Etched Single-Crystal Si Nanopillars", "author": [ { "family_name": "Walavalkar", "given_name": "Sameer S.", "orcid": "0000-0002-7628-9600", "clpid": "Walavalkar-S-S" }, { "family_name": "Hofmann", "given_name": "Carrie E.", "orcid": "0000-0002-3945-3379", "clpid": "Hofmann-Carrie-Elizabeth" }, { "family_name": "Homyk", "given_name": "Andrew P.", "clpid": "Homyk-A-P" }, { "family_name": "Henry", "given_name": "M. David", "orcid": "0000-0002-5201-0644", "clpid": "Henry-M-D" }, { "family_name": "Atwater", "given_name": "Harry A.", "orcid": "0000-0001-9435-0201", "clpid": "Atwater-H-A" }, { "family_name": "Scherer", "given_name": "Axel", "orcid": "0000-0002-2160-9064", "clpid": "Scherer-A" } ], "abstract": "Visible and near-IR photoluminescence (PL) is reported from sub-10 nm silicon nanopillars. Pillars were plasma etched from single crystal Si wafers and thinned by utilizing strain-induced, self-terminating oxidation of cylindrical structures. PL, lifetime, and transmission electron microscopy were performed to measure the dimensions and emission characteristics of the pillars. The peak PL energy was found to blue shift with narrowing pillar diameter in accordance with a quantum confinement effect. The blue shift was quantified using a tight binding method simulation that incorporated the strain induced by the thermal oxidation process. These pillars show promise as possible complementary metal oxide semiconductor compatible silicon devices in the form of light-emitting diode or laser structures.", "doi": "10.1021/nl102140k", "issn": "1530-6984", "publisher": "American Chemical Society", "publication": "Nano Letters", "publication_date": "2010-11", "series_number": "11", "volume": "10", "issue": "11", "pages": "4423-4428" }, { "id": "authors:ctxnz-gnm57", "collection": "authors", "collection_id": "ctxnz-gnm57", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100414-093535652", "type": "article", "title": "Conjugated Polymer/Metal Nanowire Heterostructure Plasmonic Antennas", "author": [ { "family_name": "O'Carroll", "given_name": "Deirdre M.", "clpid": "O'Carroll-D-M" }, { "family_name": "Hofmann", "given_name": "Carrie E.", "orcid": "0000-0002-3945-3379", "clpid": "Hofmann-Carrie-Elizabeth" }, { "family_name": "Atwater", "given_name": "Harry A.", "orcid": "0000-0001-9435-0201", "clpid": "Atwater-H-A" } ], "abstract": "The spontaneous emission spectrum, polarization direction, and emission lifetime of monolithically coupled poly-(3-hexylthiophene), P3HT, light-emitting nanostructures are modified by gold nanowire antennas. The P3HT nanostructure is integrated onto the end of the gold nanowire antenna, where localized, longitudinal surface plasmon mode fields are strongest. Comprehensive optical characterization and theoretical modeling are employed to demonstrate plasmonic nanoantenna-mediated light emission from P3HT.", "doi": "10.1002/adma.200902024", "issn": "0935-9648", "publisher": "Wiley", "publication": "Advanced Materials", "publication_date": "2010-03-19", "series_number": "11", "volume": "22", "issue": "11", "pages": "1223-1227" }, { "id": "authors:kyev8-y6y19", "collection": "authors", "collection_id": "kyev8-y6y19", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170803-093629989", "type": "article", "title": "Plasmonic Modes of Annular Nanoresonators Imaged by Spectrally Resolved Cathodoluminescence", "author": [ { "family_name": "Hofmann", "given_name": "Carrie E.", "orcid": "0000-0002-3945-3379", "clpid": "Hofmann-Carrie-Elizabeth" }, { "family_name": "Vesseur", "given_name": "Ernst Jan R.", "clpid": "Vesseur-E-J-R" }, { "family_name": "Sweatlock", "given_name": "Luke A.", "clpid": "Sweatlock-L-A" }, { "family_name": "Lezec", "given_name": "Henri J.", "clpid": "Lezec-H-J" }, { "family_name": "Garc\u00eda de Abajo", "given_name": "F. Javier", "clpid": "Garc\u00eda-de-Abajo-F-J" }, { "family_name": "Polman", "given_name": "Albert", "orcid": "0000-0002-0685-3886", "clpid": "Polman-A" }, { "family_name": "Atwater", "given_name": "Harry A.", "orcid": "0000-0001-9435-0201", "clpid": "Atwater-H-A" } ], "abstract": "We report the observation of plasmonic modes of annular resonators in nanofabricated Ag and Au surfaces that are imaged by spectrally resolved cathodoluminescence. A highly focused 30 keV electron beam is used to excite localized surface plasmons that couple to collective resonant modes of the nanoresonators. We demonstrate unprecedented resolution of plasmonic mode excitation and by combining these observations with full-field simulations find that cathodoluminescence in plasmonic nanostructures is most efficiently excited at positions corresponding to antinodes in the modal electric field intensity.", "doi": "10.1021/nl071789f", "issn": "1530-6984", "publisher": "American Chemical Society", "publication": "Nano Letters", "publication_date": "2007-12", "series_number": "12", "volume": "7", "issue": "12", "pages": "3612-3617" } ]