Low-loss, wide-angle Y splitter at ∼16-µm wavelengths built with a two-dimensional photonic crystal

Lin, Shawn Yu; Chow, Edmond; Bur, James A.; Johnson, Steven G.; Joannopoulos, J. D.

doi:10.1364/ol.27.001400

Cited by 89 publications

(33 citation statements)

References 14 publications

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“…The existence of band gap in PhC structures led to many prominent applications in integrated optics. Photonic crystals are nowadays used for different applications such as filters [3], modulators [4][5][6], switches [7], beam splitters [8][9][10], and super prisms [11][12][13] for multiplexing and demultiplexing for example. All-optical switching is one of the most important targets for photonics.…”

Section: Introductionmentioning

confidence: 99%

Novel All-Optical Logic Gates Based on Photonic Crystal Structure

Noshad

Abbasi

Ranjbar

et al. 2012

J. Phys.: Conf. Ser.

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Section: Introductionmentioning

confidence: 99%

Novel All-Optical Logic Gates Based on Photonic Crystal Structure

Noshad

Abbasi

Ranjbar

et al. 2012

J. Phys.: Conf. Ser.

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“…Hetero-structure photonic waveguides, which are formed by embedding two or more dielectric films or photonic crystals into a single structure, has been studied by both theoretical and experimental. [12][13][14] It has been found that the number of bound states within the waveguides depended on the width and well depth and the Hetero-structure have been used to develop devices such as resonant cavities 15 , waveguides 16 and filters 17 . Meanwhile nonlinear nanophotonic coupling waveguides induced by laser or stress field have also been investigated both theoretically [18][19][20] and experimentally [21][22] .…”

Section: Introductionmentioning

confidence: 99%

Resonant splitting in periodic T-shaped photonic waveguides

Wang

Yang

Xie

et al. 2012

Journal of Applied Physics

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Abstract:Resonant splitting phenomena of photons in periodic T-shaped waveguide structure are investigated by the Green's function method. An interesting resonant phenomenon is found in the transmission spectra. When the T-shaped structure contains n constrictions, there are (n-1)-fold resonant splitting peaks in the low frequency region. The peaks are induced by low quasi-bound states in which photons are intensively localized in the stubs. While (n-2)-fold resonant splitting occurs in the high frequency region. These peaks are induced by the high quasi-bound states where the photons are mainly localized in constrictions rather than in stubs. To this kind of quasi-bound state, the stub acts as a potential barrier rather than a well, which is the inverse of the case of the low quasi-bound states corresponding to the (n-1)-fold splitting peaks. These resonant peaks can be modulated by adjusting the periodic number and geometry of the waveguide structures. The results can be used to develop optical switching devices, tunable filters, and coupled waveguides.

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“…[5][6][7] In this letter, we report on a demonstration of Mach-Zehnder interferometers formed in twodimensional photonic crystals.…”

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confidence: 99%

“…[2][3][4] However, there have been few demonstrations published to date of photonic crystal waveguide bends and branches. [5][6][7] In this letter, we report on a demonstration of Mach-Zehnder interferometers formed in twodimensional photonic crystals.…”

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confidence: 99%

Two-dimensional photonic crystal Mach–Zehnder interferometers

Shih

Kim

Kuang

et al. 2004

Applied Physics Letters

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Mach-Zehnder interferometers were fabricated from suspended membrane photonic crystal waveguides. Transmission spectra were measured and device operation was shown to be in agreement with theoretical predictions. © 2004 American Institute of Physics. ͓DOI: 10.1063/1.1642758͔ Planar photonic crystal waveguide ͑PCWG͒ technology has the potential to be a fundamental building block for future optical integrated circuits. Some of this potential arises from the ability to form small turning radius waveguide bends and wide angle Y branches 1 leading to the possibility of dense device integration. There have been many experimental demonstrations of two-dimensional photonic crystal waveguides recently including quantitative optical loss measurements.2-4 However, there have been few demonstrations published to date of photonic crystal waveguide bends and branches. [5][6][7] In this letter, we report on a demonstration of Mach-Zehnder interferometers formed in twodimensional photonic crystals.In this work we have fabricated Mach-Zehnder interferometers in two-dimensional photonic crystals with a range of path length differences between the arms of the interferometer. We expect therefore that the intensity transmitted through the interferometers will exhibit oscillations in the transmitted intensity as a function of the optical frequency with a period that depends on the path length difference and the propagation coefficient. The finite element method was used to calculate the band structure of the even guided mode for the PCWGs. Figure 1͑a͒ shows the calculated dispersion relations of guided modes of waveguides with ratios of the hole radius to lattice constant, r/a, of 0.27, 0.30, and 0.33. Only the lowest order guided mode is included in this figure. In this work, we intend to operate the fabricated MachZehnder interferometers in the spectral region in which there is very little chromatic dispersion. This simplifies the data analysis because we expect a fixed propagation coefficient and therefore a fixed oscillation period in the transmitted intensity over the wavelength range of operation. From the data in Fig. 1͑a͒, for an r/a value of 0.3 and a lattice constant value of 420 nm, this low chromatic dispersion region corresponds to the wavelength range of 1500-1550 nm and propagation coefficient in the range of 0.30-0.35. The experimental data in each case was taken in this low chromatic dispersion region. The group index can be obtained by differentiating the dispersion relation in Fig. 1͑a͒ and is plotted as a function of normalized wavelength in Fig. 1͑b͒ APPLIED PHYSICS LETTERS

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Low-loss, wide-angle Y splitter at ∼16-µm wavelengths built with a two-dimensional photonic crystal

Cited by 89 publications

References 14 publications

Novel All-Optical Logic Gates Based on Photonic Crystal Structure

Novel All-Optical Logic Gates Based on Photonic Crystal Structure

Resonant splitting in periodic T-shaped photonic waveguides

Two-dimensional photonic crystal Mach–Zehnder interferometers

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