High-modulation-efficiency, integrated waveguide modulator-laser diode at 448 nm

Handle URI:
http://hdl.handle.net/10754/595377
Title:
High-modulation-efficiency, integrated waveguide modulator-laser diode at 448 nm
Authors:
Shen, Chao; Ng, Tien Khee ( 0000-0002-1480-6975 ) ; Leonard, John T.; Pourhashemi, Arash; Oubei, Hassan M. ( 0000-0001-6440-2488 ) ; Alias, Mohd Sharizal ( 0000-0003-1369-1421 ) ; Nakamura, Shuji; DenBaars, Steven P.; Speck, James S.; Alyamani, Ahmed Y.; Eldesouki, Munir M.; Ooi, Boon S. ( 0000-0001-9606-5578 )
Abstract:
To date, solid-state lighting (SSL), visible light communication (VLC) and optical clock generation functionalities in the blue-green color regime have been demonstrated based on discrete devices, including light-emitting diodes, laser diodes, and transverse-transmission modulators. This work presents the first integrated waveguide modulator-laser diode (IWM-LD) at 448 nm, offering the advantages of small-footprint, high-speed, and low power-consumption. A high modulation efficiency of 2.68 dB/V, deriving from a large extinction ratio of 9.4 dB and a low operating voltage range of 3.5 V, was measured. The electroabsorption characteristics revealed that the modulation effect, as observed from the red-shifting of the absorption edge, was resulted from the external-field-induced quantum-confined-Stark-effect (QCSE). A comparative analysis of the photocurrent versus wavelength spectra in semipolar- and polar-plane InGaN/GaN quantum wells (QWs) confirmed that the IWM-LD based on semipolar (20¯2 ¯1) QWs was able to operate in a manner similar to other III-V materials typically used in optical telecommunications, due to the reduced piezoelectric field. Utilizing the integrated modulator, a -3dB bandwidth of ~1 GHz was measured, and a data rate of 1 Gbit/s was demonstrated using on-off keying (OOK) modulation. Our experimental investigation highlighted the advantage of implementing the IWM-LD on the same semipolar QW epitaxy in enabling a high-efficiency platform for SSL-VLC dual-functionalities.
KAUST Department:
Photonics Laboratory
Citation:
High-modulation-efficiency, integrated waveguide modulator-laser diode at 448 nm 2016 ACS Photonics
Publisher:
American Chemical Society (ACS)
Journal:
ACS Photonics
Issue Date:
25-Jan-2016
DOI:
10.1021/acsphotonics.5b00599
Type:
Article
ISSN:
2330-4022; 2330-4022
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acsphotonics.5b00599
Appears in Collections:
Articles; Photonics Laboratory

Full metadata record

DC FieldValue Language
dc.contributor.authorShen, Chaoen
dc.contributor.authorNg, Tien Kheeen
dc.contributor.authorLeonard, John T.en
dc.contributor.authorPourhashemi, Arashen
dc.contributor.authorOubei, Hassan M.en
dc.contributor.authorAlias, Mohd Sharizalen
dc.contributor.authorNakamura, Shujien
dc.contributor.authorDenBaars, Steven P.en
dc.contributor.authorSpeck, James S.en
dc.contributor.authorAlyamani, Ahmed Y.en
dc.contributor.authorEldesouki, Munir M.en
dc.contributor.authorOoi, Boon S.en
dc.date.accessioned2016-02-01T13:58:38Zen
dc.date.available2016-02-01T13:58:38Zen
dc.date.issued2016-01-25en
dc.identifier.citationHigh-modulation-efficiency, integrated waveguide modulator-laser diode at 448 nm 2016 ACS Photonicsen
dc.identifier.issn2330-4022en
dc.identifier.issn2330-4022en
dc.identifier.doi10.1021/acsphotonics.5b00599en
dc.identifier.urihttp://hdl.handle.net/10754/595377en
dc.description.abstractTo date, solid-state lighting (SSL), visible light communication (VLC) and optical clock generation functionalities in the blue-green color regime have been demonstrated based on discrete devices, including light-emitting diodes, laser diodes, and transverse-transmission modulators. This work presents the first integrated waveguide modulator-laser diode (IWM-LD) at 448 nm, offering the advantages of small-footprint, high-speed, and low power-consumption. A high modulation efficiency of 2.68 dB/V, deriving from a large extinction ratio of 9.4 dB and a low operating voltage range of 3.5 V, was measured. The electroabsorption characteristics revealed that the modulation effect, as observed from the red-shifting of the absorption edge, was resulted from the external-field-induced quantum-confined-Stark-effect (QCSE). A comparative analysis of the photocurrent versus wavelength spectra in semipolar- and polar-plane InGaN/GaN quantum wells (QWs) confirmed that the IWM-LD based on semipolar (20¯2 ¯1) QWs was able to operate in a manner similar to other III-V materials typically used in optical telecommunications, due to the reduced piezoelectric field. Utilizing the integrated modulator, a -3dB bandwidth of ~1 GHz was measured, and a data rate of 1 Gbit/s was demonstrated using on-off keying (OOK) modulation. Our experimental investigation highlighted the advantage of implementing the IWM-LD on the same semipolar QW epitaxy in enabling a high-efficiency platform for SSL-VLC dual-functionalities.en
dc.language.isoenen
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acsphotonics.5b00599en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acsphotonics.5b00599.en
dc.titleHigh-modulation-efficiency, integrated waveguide modulator-laser diode at 448 nmen
dc.typeArticleen
dc.contributor.departmentPhotonics Laboratoryen
dc.identifier.journalACS Photonicsen
dc.eprint.versionPost-printen
dc.contributor.institutionMaterials Department, University of California Sant a Barbara, Santa Barbara, CA 93106, USAen
dc.contributor.institutionKing Abdulaziz City for Science and Technology (KACST ), Riyadh 11442, Saudi Arabiaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorShen, Chaoen
kaust.authorNg, Tien Kheeen
kaust.authorOubei, Hassan M.en
kaust.authorAlias, Mohd Sharizalen
kaust.authorOoi, Boon S.en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.