Quantum dot spontaneous emission control in a ridge waveguide
We investigate the spontaneous emission (SE) of self-assembled InAs quantum dots (QDs) embedded in GaAs ridge waveguides that lay on a low index substrate. In thin enough waveguides, the coupling to the fundamental guided mode is vanishingly small. A pronounced anisotropy in the coupling to non-guid...
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Veröffentlicht in: | Applied physics letters 2015-01, Vol.106 (4), p.41112-121108 |
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creator | Stepanov, Petr Delga, Adrien Zang, Xiaorun Bleuse, Joël Dupuy, Emmanuel Peinke, Emanuel Lalanne, Philippe Gérard, Jean-Michel Claudon, Julien |
description | We investigate the spontaneous emission (SE) of self-assembled InAs quantum dots (QDs) embedded in GaAs ridge waveguides that lay on a low index substrate. In thin enough waveguides, the coupling to the fundamental guided mode is vanishingly small. A pronounced anisotropy in the coupling to non-guided modes is then directly evidenced by normal-incidence photoluminescence polarization measurements. In this regime, a measurement of the QD decay rate reveals a SE inhibition by a factor up to 4. In larger wires, which ensure an optimal transverse confinement of the fundamental guided mode, the decay rate approaches the bulk value. Building on the good agreement with theoretical predictions, we infer from calculations the fraction β of SE coupled to the fundamental guided mode for some important QD excitonic complexes. For a charged exciton (isotropic in plane optical dipole), β reaches 0.61 at maximum for an on-axis QD. In the case of a purely transverse linear optical dipole, β increases up to 0.91. This optimal configuration is achievable through the selective excitation of one of the bright neutral excitons. |
doi_str_mv | 10.1063/1.4906921 |
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In thin enough waveguides, the coupling to the fundamental guided mode is vanishingly small. A pronounced anisotropy in the coupling to non-guided modes is then directly evidenced by normal-incidence photoluminescence polarization measurements. In this regime, a measurement of the QD decay rate reveals a SE inhibition by a factor up to 4. In larger wires, which ensure an optimal transverse confinement of the fundamental guided mode, the decay rate approaches the bulk value. Building on the good agreement with theoretical predictions, we infer from calculations the fraction β of SE coupled to the fundamental guided mode for some important QD excitonic complexes. For a charged exciton (isotropic in plane optical dipole), β reaches 0.61 at maximum for an on-axis QD. In the case of a purely transverse linear optical dipole, β increases up to 0.91. This optimal configuration is achievable through the selective excitation of one of the bright neutral excitons.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.4906921</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Anisotropy ; Applied physics ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; Coupling ; Decay rate ; Dipoles ; Emission analysis ; Emissions control ; EXCITONS ; GALLIUM ARSENIDES ; INDIUM ARSENIDES ; Optics ; PHOTOLUMINESCENCE ; Physics ; POLARIZATION ; QUANTUM DOTS ; Quantum theory ; Self-assembly ; Spontaneous emission ; SUBSTRATES ; WAVEGUIDES</subject><ispartof>Applied physics letters, 2015-01, Vol.106 (4), p.41112-121108</ispartof><rights>2015 AIP Publishing LLC.</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c420t-acc38b1596cb6eea8f974762944e92b011f9138ecefb062c8b2374fff5e2eb2b3</citedby><cites>FETCH-LOGICAL-c420t-acc38b1596cb6eea8f974762944e92b011f9138ecefb062c8b2374fff5e2eb2b3</cites><orcidid>0000-0001-9788-9210 ; 0000-0002-7444-3985 ; 0000-0003-3626-3630 ; 0000-0002-0929-0409</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27903,27904</link.rule.ids><backlink>$$Uhttps://iogs.hal.science/hal-01381358$$DView record in HAL$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/22415173$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Stepanov, Petr</creatorcontrib><creatorcontrib>Delga, Adrien</creatorcontrib><creatorcontrib>Zang, Xiaorun</creatorcontrib><creatorcontrib>Bleuse, Joël</creatorcontrib><creatorcontrib>Dupuy, Emmanuel</creatorcontrib><creatorcontrib>Peinke, Emanuel</creatorcontrib><creatorcontrib>Lalanne, Philippe</creatorcontrib><creatorcontrib>Gérard, Jean-Michel</creatorcontrib><creatorcontrib>Claudon, Julien</creatorcontrib><title>Quantum dot spontaneous emission control in a ridge waveguide</title><title>Applied physics letters</title><description>We investigate the spontaneous emission (SE) of self-assembled InAs quantum dots (QDs) embedded in GaAs ridge waveguides that lay on a low index substrate. In thin enough waveguides, the coupling to the fundamental guided mode is vanishingly small. A pronounced anisotropy in the coupling to non-guided modes is then directly evidenced by normal-incidence photoluminescence polarization measurements. In this regime, a measurement of the QD decay rate reveals a SE inhibition by a factor up to 4. In larger wires, which ensure an optimal transverse confinement of the fundamental guided mode, the decay rate approaches the bulk value. Building on the good agreement with theoretical predictions, we infer from calculations the fraction β of SE coupled to the fundamental guided mode for some important QD excitonic complexes. For a charged exciton (isotropic in plane optical dipole), β reaches 0.61 at maximum for an on-axis QD. In the case of a purely transverse linear optical dipole, β increases up to 0.91. This optimal configuration is achievable through the selective excitation of one of the bright neutral excitons.</description><subject>Anisotropy</subject><subject>Applied physics</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>Coupling</subject><subject>Decay rate</subject><subject>Dipoles</subject><subject>Emission analysis</subject><subject>Emissions control</subject><subject>EXCITONS</subject><subject>GALLIUM ARSENIDES</subject><subject>INDIUM ARSENIDES</subject><subject>Optics</subject><subject>PHOTOLUMINESCENCE</subject><subject>Physics</subject><subject>POLARIZATION</subject><subject>QUANTUM DOTS</subject><subject>Quantum theory</subject><subject>Self-assembly</subject><subject>Spontaneous emission</subject><subject>SUBSTRATES</subject><subject>WAVEGUIDES</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNpFkE9LAzEQxYMoWKsHv0HAk4fVTJLNbg4eSvEfFETQc8imkzal3dRNtuK3d4vFnoZ5PH4z7xFyDewOmBL3cCc1U5rDCRkBq6pCANSnZMQYE4XSJZyTi5RWw1pyIUbk4b23be43dB4zTdvYZtti7BPFTUgpxJa6QevimoaWWtqF-QLpt93hog9zvCRn3q4TXh3mmHw-PX5MX4rZ2_PrdDIrnOQsF9Y5UTdQauUahWhrrytZKa6lRM0bBuA1iBod-oYp7uqGi0p670vk2PBGjMnNHzemHExyIaNbDo-16LLhXEIJlRhct3-upV2bbRc2tvsx0QbzMpmZvcaGIyDKegdH4raLXz2mbFax79ohhOHApRYKWH0kui6m1KH_xwIz-74NmEPf4heLNm_m</recordid><startdate>20150126</startdate><enddate>20150126</enddate><creator>Stepanov, Petr</creator><creator>Delga, Adrien</creator><creator>Zang, Xiaorun</creator><creator>Bleuse, Joël</creator><creator>Dupuy, Emmanuel</creator><creator>Peinke, Emanuel</creator><creator>Lalanne, Philippe</creator><creator>Gérard, Jean-Michel</creator><creator>Claudon, Julien</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0001-9788-9210</orcidid><orcidid>https://orcid.org/0000-0002-7444-3985</orcidid><orcidid>https://orcid.org/0000-0003-3626-3630</orcidid><orcidid>https://orcid.org/0000-0002-0929-0409</orcidid></search><sort><creationdate>20150126</creationdate><title>Quantum dot spontaneous emission control in a ridge waveguide</title><author>Stepanov, Petr ; 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In thin enough waveguides, the coupling to the fundamental guided mode is vanishingly small. A pronounced anisotropy in the coupling to non-guided modes is then directly evidenced by normal-incidence photoluminescence polarization measurements. In this regime, a measurement of the QD decay rate reveals a SE inhibition by a factor up to 4. In larger wires, which ensure an optimal transverse confinement of the fundamental guided mode, the decay rate approaches the bulk value. Building on the good agreement with theoretical predictions, we infer from calculations the fraction β of SE coupled to the fundamental guided mode for some important QD excitonic complexes. For a charged exciton (isotropic in plane optical dipole), β reaches 0.61 at maximum for an on-axis QD. In the case of a purely transverse linear optical dipole, β increases up to 0.91. 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subjects | Anisotropy Applied physics CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Coupling Decay rate Dipoles Emission analysis Emissions control EXCITONS GALLIUM ARSENIDES INDIUM ARSENIDES Optics PHOTOLUMINESCENCE Physics POLARIZATION QUANTUM DOTS Quantum theory Self-assembly Spontaneous emission SUBSTRATES WAVEGUIDES |
title | Quantum dot spontaneous emission control in a ridge waveguide |
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