Results 301 to 310 of about 560,798 (337)
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Three-Dimensional Nanofabrication with Elastomeric Phase Masks
The Journal of Physical Chemistry B, 2007This Feature Article reviews recent work on an optical technique for fabricating, in a single exposure step, three-dimensional (3D) nanostructures with diverse structural layouts. The approach, which we refer to as proximity field nanopatterning, uses conformable, elastomeric phase masks to pattern thick layers of transparent, photosensitive materials ...
Shir, DJ Shir, Daniel J. +10 more
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Attenuated Phase-Shifting Mask
2009If the opaque regions on a COG mask become partially transmitting with a 180° phase relative to the bright regions, as shown in Fig. 6.1, an attenuated PSM results [15, 16]. As opposed to an alternating PSM where all phase regions image onto the wafer, the partially transmitting background of an attenuated PSMâusually with an intensity transmission ...
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Effective Apodized Phase Mask For Optimum FBGs
Conference on Lasers and Electro-Optics-Europe, 1998FBGs are promising devices for DWDM networks [1]. Phase mask (PM) technique is one of the most versatile techniques for massive production of FBGs. However, ever increasing requirements of DWDM put stringent requirements on FBG sidelobe suppression and spectral skirt sharpness.
J.J. Pan, F.Q. Zhou, Y. Shi, S.X. Li
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Cascade six-level phase-mask achromatic coronagraph
Applied Optics, 2016A cascade six-level phase-mask achromatic coronagraph is proposed. We show that, for the ideal aberration-free case, the average suppression of the central starlight in a three-stage six-level phase-mask achromatic coronagraph (SLPMC) can reach about 10⁻⁸ over a 40% bandwidth. We also do the optimization analysis of the working wavelength of each phase
Yajun, Ge +4 more
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Acousto-optic phase-mask emulation
Journal of Micro/Nanolithography, MEMS, and MOEMS, 2007Emulation of phase-shift mask (PSM) imaging techniques through the use of acousto-optic interaction, rather than fixed photomasks, is demonstrated. The phasefront and irradiance profile of a uniform illumination beam are manipulated acousto-optically in two dimensions by controlling the phase and amplitude of the radio-frequency (RF) signals, which ...
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Influence of interaural phase on forward masking
The Journal of the Acoustical Society of America, 1973This study investigated the degree to which masking level differences (MLDs) obtained by six normal-hearing subjects during simultaneous masking continue to be manifest during the forward masking that follows termination of the masker. Thresholds for 500-Hz probe tones of 745 msec were obtained in quiet and in a 1000-msec narrow-band noise centered at ...
J, Punch, R, Carhart
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Interaural Phase and the Release from Masking
International Journal of Audiology, 1972In previous presentations to this congress we have reported an increase in intelligibility of isolated words at poor signal-to-noise ratios when the phase angle differences between the ears were adjusted to certain values. Question has arisen as to whether this phenomenon is one of a peculiar property of speech or one of that kind usually called ...
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Broadband nulling of a vortex phase mask
Optics Letters, 2005A pulse transmitted through a helical vortex phase mask undergoes a temporal Hilbert transform. The fluence transmitted into the unfavorable plane wave mode is found to increase as the square of the bandwidth and, to first order, is independent of the topological charge.
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Planning for post‐pandemic cancer care delivery: Recovery or opportunity for redesign?
Ca-A Cancer Journal for Clinicians, 2021Pelin Cinar +2 more
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Phase transitions in 2D materials
Nature Reviews Materials, 2021Wenbin Li, Xiaofeng Qian, Ju Li
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