Publication
Spontaneous emission enhancement in micropatterned GaN
| Summary: | With two interfering pulses from the fourth harmonic of a Nd–YAG laser we burnt a periodic lattice structure into the surface of GaN thin films. The lattice period of this permanent grating could be controlled between less than one and several tens of microns. Above the decomposition threshold, nitrogen evades from the sample surface, and the residual metallic gallium accumulates in the form of tiny droplets at the surfaces. The patterned structure shows structural similarities with microcavities. The question arises if the residual metallic gallium may act as a partially reflecting mirror. To test this hypothesis, we studied the steady-state and transient photoluminescence through the modulation of light emerging from the ubiquitous broad “yellow” photoluminescence band. The microlattice is evidenced by energy-equidistant spontaneous emission enhancement peaks in the steady-state photoluminescence spectra. We suggest that the partial reflection due to the residual metallic gallium leads to the observed enhancement effect. |
|---|---|
| Main Authors: | Niehus, M. |
| Other Authors: | Sanguino, P.; Monteiro, T.; Soares, M.J.; Schwarz, R. |
| Subject: | GaN thin films Periodic lattice structure Optical properties |
| Year: | 2004 |
| Country: | Portugal |
| Document type: | article |
| Access type: | restricted access |
| Associated institution: | Universidade de Aveiro |
| Language: | English |
| Origin: | RIA - Repositório Institucional da Universidade de Aveiro |
| _version_ | 1877768522608672768 |
|---|---|
| author | Niehus, M. |
| author2 | Sanguino, P. Monteiro, T. Soares, M.J. Schwarz, R. |
| author2_role | author author author author |
| author_facet | Niehus, M. Sanguino, P. Monteiro, T. Soares, M.J. Schwarz, R. |
| author_role | author |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Niehus, M.\"},{\"Person.name\":\"Sanguino, P.\"},{\"Person.name\":\"Monteiro, T.\"},{\"Person.name\":\"Soares, M.J.\"},{\"Person.name\":\"Schwarz, R.\"}] |
| datacite.creators.creator.creatorName.fl_str_mv | Niehus, M. Sanguino, P. Monteiro, T. Soares, M.J. Schwarz, R. |
| datacite.date.Accepted.fl_str_mv | 2004-10-01T00:00:00Z |
| datacite.date.embargoed.fl_str_mv | 10000-01-01T00:00:00Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | GaN thin films Periodic lattice structure Optical properties |
| datacite.titles.title.fl_str_mv | Spontaneous emission enhancement in micropatterned GaN |
| dc.creator.none.fl_str_mv | Niehus, M. Sanguino, P. Monteiro, T. Soares, M.J. Schwarz, R. |
| dc.date.Accepted.fl_str_mv | 2004-10-01T00:00:00Z |
| dc.date.embargoed.fl_str_mv | 10000-01-01T00:00:00Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10773/6152 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.subject.none.fl_str_mv | GaN thin films Periodic lattice structure Optical properties |
| dc.title.fl_str_mv | Spontaneous emission enhancement in micropatterned GaN |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | With two interfering pulses from the fourth harmonic of a Nd–YAG laser we burnt a periodic lattice structure into the surface of GaN thin films. The lattice period of this permanent grating could be controlled between less than one and several tens of microns. Above the decomposition threshold, nitrogen evades from the sample surface, and the residual metallic gallium accumulates in the form of tiny droplets at the surfaces. The patterned structure shows structural similarities with microcavities. The question arises if the residual metallic gallium may act as a partially reflecting mirror. To test this hypothesis, we studied the steady-state and transient photoluminescence through the modulation of light emerging from the ubiquitous broad “yellow” photoluminescence band. The microlattice is evidenced by energy-equidistant spontaneous emission enhancement peaks in the steady-state photoluminescence spectra. We suggest that the partial reflection due to the residual metallic gallium leads to the observed enhancement effect. |
| dirty | 0 |
| eu_rights_str_mv | restrictedAccess |
| format | article |
| id | ria_a4edf2746f7cdd51a5ec448f1d7eb2cb |
| identifier.url.fl_str_mv | http://hdl.handle.net/10773/6152 |
| inst_facet_str | urn:organizationAcronym:ua{{{_:::_}}}Universidade de Aveiro |
| instacron_str | ua |
| institution | Universidade de Aveiro |
| instname_str | Universidade de Aveiro |
| language | eng |
| network_acronym_str | ria |
| network_name_str | RIA - Repositório Institucional da Universidade de Aveiro |
| oai_identifier_str | oai:ria.ua.pt:10773/6152 |
| organization_str_mv | urn:organizationAcronym:ua |
| person_str_mv | Niehus, M. Sanguino, P. Monteiro, T. Soares, M.J. Schwarz, R. |
| publishDate | 2004 |
| publisher.none.fl_str_mv | Elsevier |
| repo_facet_str | urn:repositoryAcronym:ria{{{_:::_}}}RIA - Repositório Institucional da Universidade de Aveiro |
| reponame_str | RIA - Repositório Institucional da Universidade de Aveiro |
| repository_id_str | urn:repositoryAcronym:ria |
| service_str_mv | urn:repositoryAcronym:ria |
| spelling | porWith two interfering pulses from the fourth harmonic of a Nd–YAG laser we burnt a periodic lattice structure into the surface of GaN thin films. The lattice period of this permanent grating could be controlled between less than one and several tens of microns. Above the decomposition threshold, nitrogen evades from the sample surface, and the residual metallic gallium accumulates in the form of tiny droplets at the surfaces. The patterned structure shows structural similarities with microcavities. The question arises if the residual metallic gallium may act as a partially reflecting mirror. To test this hypothesis, we studied the steady-state and transient photoluminescence through the modulation of light emerging from the ubiquitous broad “yellow” photoluminescence band. The microlattice is evidenced by energy-equidistant spontaneous emission enhancement peaks in the steady-state photoluminescence spectra. We suggest that the partial reflection due to the residual metallic gallium leads to the observed enhancement effect.application/pdfengElsevierporSpontaneous emission enhancement in micropatterned GaNNiehus, M.Sanguino, P.Monteiro, T.Soares, M.J.Schwarz, R.Handlehttp://hdl.handle.net/10773/6152ISSNIsPartOf0749-6036DOIIsPartOf10.1016/j.spmi.2004.09.0502004-102004-10-01T00:00:00Z10000-01-01T00:00:00Zhttp://purl.org/coar/access_right/c_16ecrestricted accessporGaN thin filmsporPeriodic lattice structureporOptical properties1445624 byteshttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://ria.ua.pt/bitstream/10773/6152/1/SM.pdfliteraturehttp://purl.org/coar/resource_type/c_6501journal article |
| spellingShingle | Spontaneous emission enhancement in micropatterned GaN Niehus, M. GaN thin films Periodic lattice structure Optical properties |
| status | SINGLETON |
| subject.fl_str_mv | GaN thin films Periodic lattice structure Optical properties |
| title | Spontaneous emission enhancement in micropatterned GaN |
| title_full | Spontaneous emission enhancement in micropatterned GaN |
| title_fullStr | Spontaneous emission enhancement in micropatterned GaN |
| title_full_unstemmed | Spontaneous emission enhancement in micropatterned GaN |
| title_short | Spontaneous emission enhancement in micropatterned GaN |
| title_sort | Spontaneous emission enhancement in micropatterned GaN |
| topic | GaN thin films Periodic lattice structure Optical properties |
| topic_facet | GaN thin films Periodic lattice structure Optical properties |
| url | http://hdl.handle.net/10773/6152 |
| visible | 1 |
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