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Article: Engineering waveguide-cavity resonant side coupling in a dynamically tunable ultracompact photonic crystal filter
Title | Engineering waveguide-cavity resonant side coupling in a dynamically tunable ultracompact photonic crystal filter |
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Authors | |
Issue Date | 2005 |
Publisher | American 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, article no. 165330 , p. 1-10 How to Cite? |
Abstract | We 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 Identifier | http://hdl.handle.net/10722/91054 |
ISSN | 2014 Impact Factor: 3.736 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Lin, L-L | en_HK |
dc.contributor.author | Li, Z-Y | en_HK |
dc.contributor.author | Lin, B | en_HK |
dc.date.accessioned | 2010-09-17T10:12:21Z | - |
dc.date.available | 2010-09-17T10:12:21Z | - |
dc.date.issued | 2005 | en_HK |
dc.identifier.citation | Physical Review B (Condensed Matter and Materials Physics), 2005, v. 72 n. 16, article no. 165330 , p. 1-10 | - |
dc.identifier.issn | 1098-0121 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/91054 | - |
dc.description.abstract | We 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.language | eng | en_HK |
dc.publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ | en_HK |
dc.relation.ispartof | Physical Review B (Condensed Matter and Materials Physics) | - |
dc.title | Engineering waveguide-cavity resonant side coupling in a dynamically tunable ultracompact photonic crystal filter | en_HK |
dc.type | Article | en_HK |
dc.identifier.email | Lin, B:blin@hku.hk | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1103/PhysRevB.72.165330 | en_HK |
dc.identifier.scopus | eid_2-s2.0-29644434662 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-29644434662&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 72 | en_HK |
dc.identifier.issue | 16 | en_HK |
dc.identifier.spage | article no. 165330, p. 1 | - |
dc.identifier.epage | article no. 165330, p. 10 | - |
dc.identifier.isi | WOS:000232934900079 | - |
dc.identifier.issnl | 1098-0121 | - |