Results 201 to 210 of about 12,290,752 (249)
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Polarization separation element (subwavelength structure)
SPIE Proceedings, 2005In many applications, where the period of a grating structure is less than the wavelength of the incident light, the grating structure will function more like a medium of uniform index of refraction than as a normal grating. The effective medium index being equivalent to the volume mean index of the grating structure.
Makoto Okada +2 more
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Femtosecond Microfabrication of Subwavelength Photonic Structures
2006 European Conference on Optical Communications, 2006The fabrication of sub-micron photonic structures beyond diffraction limit is demonstrated by means of tightly focused laser pulses. 25 mm long periodic structure with a pitch size of 260 nm is experimentally produced. Detailed numerical modelling is performed to establish mechanisms of such inscription.
Jovana Petrović +3 more
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Broadband antireflective subwavelength structures for infrared detection
Optics and Laser Technology, 2022Haoran Wang +3 more
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TERAHERTZ SUBWAVELENGTH STRUCTURES FOR SENSING AND NDE
AIP Conference Proceedings, 2010The ability to control and concentrate electromagnetic (EM) energy in length scales much smaller than the excitation wavelength opens up new opportunities for sensing and NDE. Ordinarily EM wave transmission through such structures becomes infinitesimally small as the slit opening becomes much smaller than the wavelength; however, extraordinary ...
N. Gopalsami +5 more
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Reflective waveplate with subwavelength grating structure
Japanese Journal of Applied Physics, 2015A reflective waveplate with subwavelength grating structure of the photoresist was fabricated using two-beam interference technology. From the optical measurement, it is found that the phase retardation of the fabricated reflective element (period: 400 nm, fill factor: 0.5, depth: 280 nm) was almost the same as that of the transmission waveplate with ...
Junichi Yanagisawa +2 more
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Subwavelength interference of light on structured surfaces
Advances in Optics and Photonics, 2018This paper presents a review of the subwavelength interference effects of light in structured surfaces. Starting from the anomalous interference in simple structures such as double nanoslits, thin films, and catenary apertures, the theories and applications of light–matter interaction in layered, periodic, and aperiodic subwavelength structures are ...
Xiangang Luo +3 more
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Subwavelength imaging with a multilayer silver film structure
Optics Letters, 2006A Ag/SiO2 multilayer imaging structure is shown to have subwavelength performance. Loss is the major limitation, and selection of low-loss materials and suitable operating wavelengths has a significant impact on performance. The influence of the variables is presented, and vortices are shown to exist.
Ming-Chuan Yang, Kevin J. Webb
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On the effective medium theory of subwavelength periodic structures
Journal of Modern Optics, 1996Abstract The effective medium theory of one-dimensional and two-dimensional periodic structures are investigated. A method based on a Fourier decomposition of the wave propagating along the direction perpendicular to the periodic structures allows one to determine the zeroth-, first- and second-order effective indices.
Philippe Lalanne +1 more
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Super Black Material from Low-Density Carbon Aerogels with Subwavelength Structures.
ACS Nano, 2016Wei Sun +6 more
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Formation of Deep-Subwavelength Structures on Organic Materials by Femtosecond Laser Ablation
IEEE Journal of Quantum Electronics, 2018Lei Wang +7 more
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