File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Quantum-enhanced tunable second-order optical nonlinearity in bilayer graphene

TitleQuantum-enhanced tunable second-order optical nonlinearity in bilayer graphene
Authors
KeywordsBilayer grapheme
double resonance enhancement
perturbation theory
polarization
second harmonic generation
tenability
Issue Date2012
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanolett
Citation
Nano Letters, 2012, v. 12 n. 4, p. 2032-2036 How to Cite?
AbstractSecond order optical nonlinear processes involve the coherent mixing of two electromagnetic waves to generate a new optical frequency, which plays a central role in a variety of applications, such as ultrafast laser systems, rectifiers, modulators, and optical imaging. However, progress is limited in the mid-infrared (MIR) region due to the lack of suitable nonlinear materials. It is desirable to develop a robust system with a strong, electrically tunable second order optical nonlinearity. Here, we demonstrate theoretically that AB-stacked bilayer graphene (BLG) can exhibit a giant and tunable second order nonlinear susceptibility (2) once an in-plane electric field is applied. (2) can be electrically tuned from 0 to ∼10 5 pm/V, 3 orders of magnitude larger than the widely used nonlinear crystal AgGaSe 2. We show that the unusually large (2) arise from two different quantum enhanced two-photon processes thanks to the unique electronic spectrum of BLG. The tunable electronic bandgap of BLG adds additional tunability on the resonance of (2), which corresponds to a tunable wavelength ranging from ∼2.6 to ∼3.1 μm for the up-converted photon. Combined with the high electron mobility and optical transparency of the atomically thin BLG, our scheme suggests a new regime of nonlinear photonics based on BLG. © 2012 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/149127
ISSN
2015 Impact Factor: 13.779
2015 SCImago Journal Rankings: 9.006
ISI Accession Number ID
Funding AgencyGrant Number
DARPA YFAN66001-11-1-4124
N66001-10-1-4025
DARPA-MTOFA9550-10-1-0497
NSF-PHY1104546
NSFDGE-0718124
Research Grant Council of Hong Kong
NSF-DMR-1150719
Funding Information:

This work is supported by DARPA YFA N66001-11-1-4124 and NSF-DMR-1150719. L.M. and C.Z. are supported by DARPA-YFA N66001-10-1-4025, DARPA-MTO (FA9550-10-1-0497), and NSF-PHY (1104546). A.J. is supported by NSF Grant DGE-0718124. W.Y. is supported by Research Grant Council of Hong Kong.

References

 

DC FieldValueLanguage
dc.contributor.authorWu, Sen_HK
dc.contributor.authorMao, Len_HK
dc.contributor.authorJones, AMen_HK
dc.contributor.authorYao, Wen_HK
dc.contributor.authorZhang, Cen_HK
dc.contributor.authorXu, Xen_HK
dc.date.accessioned2012-06-22T06:24:53Z-
dc.date.available2012-06-22T06:24:53Z-
dc.date.issued2012en_HK
dc.identifier.citationNano Letters, 2012, v. 12 n. 4, p. 2032-2036en_HK
dc.identifier.issn1530-6984en_HK
dc.identifier.urihttp://hdl.handle.net/10722/149127-
dc.description.abstractSecond order optical nonlinear processes involve the coherent mixing of two electromagnetic waves to generate a new optical frequency, which plays a central role in a variety of applications, such as ultrafast laser systems, rectifiers, modulators, and optical imaging. However, progress is limited in the mid-infrared (MIR) region due to the lack of suitable nonlinear materials. It is desirable to develop a robust system with a strong, electrically tunable second order optical nonlinearity. Here, we demonstrate theoretically that AB-stacked bilayer graphene (BLG) can exhibit a giant and tunable second order nonlinear susceptibility (2) once an in-plane electric field is applied. (2) can be electrically tuned from 0 to ∼10 5 pm/V, 3 orders of magnitude larger than the widely used nonlinear crystal AgGaSe 2. We show that the unusually large (2) arise from two different quantum enhanced two-photon processes thanks to the unique electronic spectrum of BLG. The tunable electronic bandgap of BLG adds additional tunability on the resonance of (2), which corresponds to a tunable wavelength ranging from ∼2.6 to ∼3.1 μm for the up-converted photon. Combined with the high electron mobility and optical transparency of the atomically thin BLG, our scheme suggests a new regime of nonlinear photonics based on BLG. © 2012 American Chemical Society.en_HK
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanoletten_HK
dc.relation.ispartofNano Lettersen_HK
dc.subjectBilayer graphemeen_HK
dc.subjectdouble resonance enhancementen_HK
dc.subjectperturbation theoryen_HK
dc.subjectpolarizationen_HK
dc.subjectsecond harmonic generationen_HK
dc.subjecttenabilityen_HK
dc.titleQuantum-enhanced tunable second-order optical nonlinearity in bilayer grapheneen_HK
dc.typeArticleen_HK
dc.identifier.emailYao, W: wangyao@hku.hken_HK
dc.identifier.authorityYao, W=rp00827en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/nl300084jen_HK
dc.identifier.pmid22369519-
dc.identifier.scopuseid_2-s2.0-84859705852en_HK
dc.identifier.hkuros199939en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84859705852&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume12en_HK
dc.identifier.issue4en_HK
dc.identifier.spage2032en_HK
dc.identifier.epage2036en_HK
dc.identifier.isiWOS:000302524600048-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridWu, S=35423101900en_HK
dc.identifier.scopusauthoridMao, L=36657592500en_HK
dc.identifier.scopusauthoridJones, AM=54892641700en_HK
dc.identifier.scopusauthoridYao, W=35141935300en_HK
dc.identifier.scopusauthoridZhang, C=15823248300en_HK
dc.identifier.scopusauthoridXu, X=36672409300en_HK
dc.identifier.citeulike11500679-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats