Low-loss transmission band in photonic crystal waveguides with sharp cutoff at a frequency below the bandgap
We present TE transmission measurements of photonic crystal waveguides with high hole radius to period ratio r/Λ = 0.388. This geometry introduces a unique low loss transmission band in addition to the traditional PhC guiding band and very sharp transmission edges for devices with a length of 50 μm...
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          | Published in | Optics communications Vol. 284; no. 23; pp. 5434 - 5439 | 
|---|---|
| Main Authors | , , , , | 
| Format | Journal Article | 
| Language | English | 
| Published | 
            Elsevier B.V
    
        01.11.2011
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| Subjects | |
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| ISSN | 0030-4018 1873-0310  | 
| DOI | 10.1016/j.optcom.2011.07.073 | 
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| Abstract | We present TE transmission measurements of photonic crystal waveguides with high hole radius to period ratio r/Λ
=
0.388. This geometry introduces a unique low loss transmission band in addition to the traditional PhC guiding band and very sharp transmission edges for devices with a length of 50
μm or longer. Finite difference time domain and plane wave expansion simulations confirm the results and show that the sharpness of the cutoffs can be explained by the spectral shape of the guiding mode in the band diagram.
► New low loss transmission band in photonic crystal waveguides at a frequency below the band-gap. ► Transmission band arises from the large ratio of hole size to lattice period. ► The low frequency transmission band has sharp edges for long photonic crystal waveguides. ► Excellent agreement with 3D FDTD modeling. ► Promising applications in membrane free integrated optical devices where low loss is crucial. | 
    
|---|---|
| AbstractList | We present TE transmission measurements of photonic crystal waveguides with high hole radius to period ratio r/Λ
=
0.388. This geometry introduces a unique low loss transmission band in addition to the traditional PhC guiding band and very sharp transmission edges for devices with a length of 50
μm or longer. Finite difference time domain and plane wave expansion simulations confirm the results and show that the sharpness of the cutoffs can be explained by the spectral shape of the guiding mode in the band diagram.
► New low loss transmission band in photonic crystal waveguides at a frequency below the band-gap. ► Transmission band arises from the large ratio of hole size to lattice period. ► The low frequency transmission band has sharp edges for long photonic crystal waveguides. ► Excellent agreement with 3D FDTD modeling. ► Promising applications in membrane free integrated optical devices where low loss is crucial. We present te transmission measurements of photonic crystal waveguides with high hole radius to period ratio r/I> = 0.388. This geometry introduces a unique low loss transmission band in addition to the traditional PhC guiding band and very sharp transmission edges for devices with a length of 50 mu m or longer. Finite difference time domain and plane wave expansion simulations confirm the results and show that the sharpness of the cutoffs can be explained by the spectral shape of the guiding mode in the band diagram.  | 
    
| Author | Kristensen, Martin Groothoff, Nathaniel Malureanu, Radu Krüger, Asger Christian Zhang, Min  | 
    
| Author_xml | – sequence: 1 givenname: Asger Christian surname: Krüger fullname: Krüger, Asger Christian email: asgerk@phys.au.dk organization: Interdisciplinary Nanoscience Center, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark – sequence: 2 givenname: Min surname: Zhang fullname: Zhang, Min organization: Interdisciplinary Nanoscience Center, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark – sequence: 3 givenname: Nathaniel surname: Groothoff fullname: Groothoff, Nathaniel organization: Interdisciplinary Nanoscience Center, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark – sequence: 4 givenname: Radu surname: Malureanu fullname: Malureanu, Radu organization: Plasmonics and Metamaterials group, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, DK-2800 Kgs. Lyngby, Denmark – sequence: 5 givenname: Martin surname: Kristensen fullname: Kristensen, Martin organization: Aarhus School of Engineering and Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark  | 
    
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| Keywords | Nanophotonics Planar waveguides Integrated optics devices Low loss transmission Photonic crystals  | 
    
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| Snippet | We present TE transmission measurements of photonic crystal waveguides with high hole radius to period ratio r/Λ
=
0.388. This geometry introduces a unique low... We present te transmission measurements of photonic crystal waveguides with high hole radius to period ratio r/I> = 0.388. This geometry introduces a unique...  | 
    
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| SubjectTerms | Band spectra Integrated optics devices Low loss transmission Mathematical analysis Nanophotonics Photonic crystals Planar waveguides Plane waves Sharpness Simulation Spectra Waveguides  | 
    
| Title | Low-loss transmission band in photonic crystal waveguides with sharp cutoff at a frequency below the bandgap | 
    
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