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Article: Engineering waveguide-cavity resonant side coupling in a dynamically tunable ultracompact photonic crystal filter

TitleEngineering waveguide-cavity resonant side coupling in a dynamically tunable ultracompact photonic crystal filter
Authors
Issue Date2005
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter and Materials Physics, 2005, v. 72 n. 16, p. 1-10 How to Cite?
AbstractWe employ a plane-wave-based transfer-matrix method in combination with a Bloch-mode scattering model to scrutinize the optical performance of an ultracompact photonic crystal (PC) all-pass optical filter made from a single-mode PC waveguide side coupled with latitudinal optical microcavities. A series of geometrical configurations of resonant microcavities side coupled with the PC waveguide, such as single one-side and two-side, periodically cascaded one-side and two-side arrangement of microcavities, and different quantities of the latitudinal and longitudinal cavity scales, cavity-cavity distance, and cavity-waveguide distance have been systematically investigated. The calculated reflection spectra exhibit a continually splitting feature of resonant frequency when the cavity size is increased. The resonant frequency shifts toward higher frequencies when we reduce the indirect coupling coefficient by increasing the waveguide-cavity distance or by introducing a symmetric two-side structure of microcavities. Optical monomode operation of the reflection pulse can be achieved for appropriate distance between two horizontal microcavities. The resonant peaks gradually evolve into a distinct rectangular shape when we introduce periodically cascaded side-coupled microcavities along the waveguide direction, implying the creation of a forbidden minigap within the guided mode continuum. The optical filter in the two-side configurations has a better filtering performance than in the one-side constructions. The cascaded side-coupled cavity-waveguide structure can act as a high-performance optical delay line. © 2005 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/91054
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLin, L-Len_HK
dc.contributor.authorLi, Z-Yen_HK
dc.contributor.authorLin, Ben_HK
dc.date.accessioned2010-09-17T10:12:21Z-
dc.date.available2010-09-17T10:12:21Z-
dc.date.issued2005en_HK
dc.identifier.citationPhysical Review B - Condensed Matter and Materials Physics, 2005, v. 72 n. 16, p. 1-10en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91054-
dc.description.abstractWe employ a plane-wave-based transfer-matrix method in combination with a Bloch-mode scattering model to scrutinize the optical performance of an ultracompact photonic crystal (PC) all-pass optical filter made from a single-mode PC waveguide side coupled with latitudinal optical microcavities. A series of geometrical configurations of resonant microcavities side coupled with the PC waveguide, such as single one-side and two-side, periodically cascaded one-side and two-side arrangement of microcavities, and different quantities of the latitudinal and longitudinal cavity scales, cavity-cavity distance, and cavity-waveguide distance have been systematically investigated. The calculated reflection spectra exhibit a continually splitting feature of resonant frequency when the cavity size is increased. The resonant frequency shifts toward higher frequencies when we reduce the indirect coupling coefficient by increasing the waveguide-cavity distance or by introducing a symmetric two-side structure of microcavities. Optical monomode operation of the reflection pulse can be achieved for appropriate distance between two horizontal microcavities. The resonant peaks gradually evolve into a distinct rectangular shape when we introduce periodically cascaded side-coupled microcavities along the waveguide direction, implying the creation of a forbidden minigap within the guided mode continuum. The optical filter in the two-side configurations has a better filtering performance than in the one-side constructions. The cascaded side-coupled cavity-waveguide structure can act as a high-performance optical delay line. © 2005 The American Physical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.titleEngineering waveguide-cavity resonant side coupling in a dynamically tunable ultracompact photonic crystal filteren_HK
dc.typeArticleen_HK
dc.identifier.emailLin, B:blin@hku.hken_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevB.72.165330en_HK
dc.identifier.scopuseid_2-s2.0-29644434662en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-29644434662&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume72en_HK
dc.identifier.issue16en_HK
dc.identifier.spage1en_HK
dc.identifier.epage10en_HK
dc.identifier.isiWOS:000232934900079-

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