The Experts below are selected from a list of 29502 Experts worldwide ranked by ideXlab platform
Steven A Cummer - One of the best experts on this subject based on the ideXlab platform.
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a surface impedance based three channel acoustic metasurface retroreflector
Applied Physics Letters, 2018Co-Authors: Chen Shen, Ana Diazrubio, Steven A CummerAbstract:We propose the design and measurement of an acoustic metasurface retroreflector that works at three discrete incident angles. An impedance model is developed such that for acoustic waves impinging at −60°, the reflected wave is defined by the surface impedance of the metasurface, which is realized by a periodic grating. At 0° and 60°, the retroreflection condition can be fulfilled by the diffraction of the surface. The thickness of the metasurface is about half of the Operating Wavelength and the retroreflector functions without parasitic diffraction associated with conventional gradient-index metasurfaces. Such highly efficient and compact retroreflectors open up possibilities in metamaterial-based acoustic sensing and communications.We propose the design and measurement of an acoustic metasurface retroreflector that works at three discrete incident angles. An impedance model is developed such that for acoustic waves impinging at −60°, the reflected wave is defined by the surface impedance of the metasurface, which is realized by a periodic grating. At 0° and 60°, the retroreflection condition can be fulfilled by the diffraction of the surface. The thickness of the metasurface is about half of the Operating Wavelength and the retroreflector functions without parasitic diffraction associated with conventional gradient-index metasurfaces. Such highly efficient and compact retroreflectors open up possibilities in metamaterial-based acoustic sensing and communications.
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a surface impedance based three channel acoustic metasurface retroreflector
Applied Physics Letters, 2018Co-Authors: Chen Shen, Ana Diazrubio, Steven A CummerAbstract:We propose the design and measurement of an acoustic metasurface retroreflector that works at three discrete incident angles. An impedance model is developed such that for acoustic waves impinging at −60°, the reflected wave is defined by the surface impedance of the metasurface, which is realized by a periodic grating. At 0° and 60°, the retroreflection condition can be fulfilled by the diffraction of the surface. The thickness of the metasurface is about half of the Operating Wavelength and the retroreflector functions without parasitic diffraction associated with conventional gradient-index metasurfaces. Such highly efficient and compact retroreflectors open up possibilities in metamaterial-based acoustic sensing and communications.
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a surface impedance based three channel acoustic metasurface retroreflector
arXiv: Applied Physics, 2018Co-Authors: Chen Shen, Ana Diazrubio, Steven A CummerAbstract:We propose the design and measurement of an acoustic metasurface retroreflector that works at three discrete incident angles. An impedance model is developed such that for acoustic waves impinging at -60 degrees, the reflected wave is defined by the surface impedance of the metasurface, which is realized by a periodic grating. At 0 and 60 degrees, the retroreflection condition can be fulfilled by the diffraction of the surface. The thickness of the metasurface is about half of the Operating Wavelength and the retroreflector functions without parasitic diffraction associated with conventional gradient-index metasurfaces. Such highly efficient and compact retroreflectors open up possibilities in metamaterial-based acoustic sensing and communications.
Chen Shen - One of the best experts on this subject based on the ideXlab platform.
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a surface impedance based three channel acoustic metasurface retroreflector
Applied Physics Letters, 2018Co-Authors: Chen Shen, Ana Diazrubio, Steven A CummerAbstract:We propose the design and measurement of an acoustic metasurface retroreflector that works at three discrete incident angles. An impedance model is developed such that for acoustic waves impinging at −60°, the reflected wave is defined by the surface impedance of the metasurface, which is realized by a periodic grating. At 0° and 60°, the retroreflection condition can be fulfilled by the diffraction of the surface. The thickness of the metasurface is about half of the Operating Wavelength and the retroreflector functions without parasitic diffraction associated with conventional gradient-index metasurfaces. Such highly efficient and compact retroreflectors open up possibilities in metamaterial-based acoustic sensing and communications.We propose the design and measurement of an acoustic metasurface retroreflector that works at three discrete incident angles. An impedance model is developed such that for acoustic waves impinging at −60°, the reflected wave is defined by the surface impedance of the metasurface, which is realized by a periodic grating. At 0° and 60°, the retroreflection condition can be fulfilled by the diffraction of the surface. The thickness of the metasurface is about half of the Operating Wavelength and the retroreflector functions without parasitic diffraction associated with conventional gradient-index metasurfaces. Such highly efficient and compact retroreflectors open up possibilities in metamaterial-based acoustic sensing and communications.
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a surface impedance based three channel acoustic metasurface retroreflector
Applied Physics Letters, 2018Co-Authors: Chen Shen, Ana Diazrubio, Steven A CummerAbstract:We propose the design and measurement of an acoustic metasurface retroreflector that works at three discrete incident angles. An impedance model is developed such that for acoustic waves impinging at −60°, the reflected wave is defined by the surface impedance of the metasurface, which is realized by a periodic grating. At 0° and 60°, the retroreflection condition can be fulfilled by the diffraction of the surface. The thickness of the metasurface is about half of the Operating Wavelength and the retroreflector functions without parasitic diffraction associated with conventional gradient-index metasurfaces. Such highly efficient and compact retroreflectors open up possibilities in metamaterial-based acoustic sensing and communications.
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a surface impedance based three channel acoustic metasurface retroreflector
arXiv: Applied Physics, 2018Co-Authors: Chen Shen, Ana Diazrubio, Steven A CummerAbstract:We propose the design and measurement of an acoustic metasurface retroreflector that works at three discrete incident angles. An impedance model is developed such that for acoustic waves impinging at -60 degrees, the reflected wave is defined by the surface impedance of the metasurface, which is realized by a periodic grating. At 0 and 60 degrees, the retroreflection condition can be fulfilled by the diffraction of the surface. The thickness of the metasurface is about half of the Operating Wavelength and the retroreflector functions without parasitic diffraction associated with conventional gradient-index metasurfaces. Such highly efficient and compact retroreflectors open up possibilities in metamaterial-based acoustic sensing and communications.
Shouhuan Zhou - One of the best experts on this subject based on the ideXlab platform.
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switchable dual Wavelength erbium doped fiber ring laser using bending dependent loss to switch the Operating Wavelength
Laser Physics Letters, 2006Co-Authors: Shengping Chen, S M Wang, Yigang Li, Kecheng Lu, Lei Ding, Shouhuan ZhouAbstract:A short Wavelength band erbium-doped fiber (EDF) ring laser emitting simultaneously at 1488.9 and 1533.9 nm is demonstrated. The erbium-doped gain fiber has a depressed cladding to suppress emission at longer Wavelengths. The shorter emitting Wavelength is selected by a fiber Bragg grating (FBG), while the longer emitting Wavelength is selected by the strong gain and the reabsorbing effect. Switching between the two Operating Wavelengths is realized by simply changing the bending curvature of the EDF loop.
Shouhua Zhou - One of the best experts on this subject based on the ideXlab platform.
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switchable dual Wavelength erbium doped fiber ring laser using bending dependent loss to switch the Operating Wavelength
Laser Physics Letters, 2006Co-Authors: Shengping Che, S M Wang, Lei Ding, Shouhua ZhouAbstract:A short Wavelength band erbium-doped fiber (EDF) ring laser emitting simultaneously at 1488.9 and 1533.9 nm is demonstrated. The erbium-doped gain fiber has a depressed cladding to suppress emission at longer Wavelengths. The shorter emitting Wavelength is selected by a fiber Bragg grating (FBG), while the longer emitting Wavelength is selected by the strong gain and the reabsorbing effect. Switching between the two Operating Wavelengths is realized by simply changing the bending curvature of the EDF loop.
S M Wang - One of the best experts on this subject based on the ideXlab platform.
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switchable dual Wavelength erbium doped fiber ring laser using bending dependent loss to switch the Operating Wavelength
Laser Physics Letters, 2006Co-Authors: Shengping Chen, S M Wang, Yigang Li, Kecheng Lu, Lei Ding, Shouhuan ZhouAbstract:A short Wavelength band erbium-doped fiber (EDF) ring laser emitting simultaneously at 1488.9 and 1533.9 nm is demonstrated. The erbium-doped gain fiber has a depressed cladding to suppress emission at longer Wavelengths. The shorter emitting Wavelength is selected by a fiber Bragg grating (FBG), while the longer emitting Wavelength is selected by the strong gain and the reabsorbing effect. Switching between the two Operating Wavelengths is realized by simply changing the bending curvature of the EDF loop.
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switchable dual Wavelength erbium doped fiber ring laser using bending dependent loss to switch the Operating Wavelength
Laser Physics Letters, 2006Co-Authors: Shengping Che, S M Wang, Lei Ding, Shouhua ZhouAbstract:A short Wavelength band erbium-doped fiber (EDF) ring laser emitting simultaneously at 1488.9 and 1533.9 nm is demonstrated. The erbium-doped gain fiber has a depressed cladding to suppress emission at longer Wavelengths. The shorter emitting Wavelength is selected by a fiber Bragg grating (FBG), while the longer emitting Wavelength is selected by the strong gain and the reabsorbing effect. Switching between the two Operating Wavelengths is realized by simply changing the bending curvature of the EDF loop.