1,980 research outputs found
Coupling single emitters to quantum plasmonic circuits
In recent years the controlled coupling of single photon emitters to
propagating surface plasmons has been intensely studied, which is fueled by the
prospect of a giant photonic non-linearity on a nano-scaled platform. In this
article we will review the recent progress on coupling single emitters to
nano-wires towards the construction of a new platform for strong light-matter
interaction. The control over such a platform might open new doors for quantum
information processing and quantum sensing at the nanoscale, and for the study
of fundamental physics in the ultra-strong coupling regime
Image gathering, coding, and processing: End-to-end optimization for efficient and robust acquisition of visual information
Researchers are concerned with the end-to-end performance of image gathering, coding, and processing. The applications range from high-resolution television to vision-based robotics, wherever the resolution, efficiency and robustness of visual information acquisition and processing are critical. For the presentation at this workshop, it is convenient to divide research activities into the following two overlapping areas: The first is the development of focal-plane processing techniques and technology to effectively combine image gathering with coding, with an emphasis on low-level vision processing akin to the retinal processing in human vision. The approach includes the familiar Laplacian pyramid, the new intensity-dependent spatial summation, and parallel sensing/processing networks. Three-dimensional image gathering is attained by combining laser ranging with sensor-array imaging. The second is the rigorous extension of information theory and optimal filtering to visual information acquisition and processing. The goal is to provide a comprehensive methodology for quantitatively assessing the end-to-end performance of image gathering, coding, and processing
Coupling of a Single Quantum Emitter to End-to-end Aligned Silver Nanowires
We report on the observation of coupling a single nitrogen vacancy (NV)
center in a nanodiamond crystal to a propagating plasmonic mode of silver
nanowires. The nanocrystal is placed either near to the apex of a single silver
nanowire or in the gap between two end-to-end aligned silver nanowires. We
observe an enhancement of the NV-centers' decay rate in both cases as a result
of the coupling to the plasmons. The devices are nano-assembled with a scanning
probe technique. Through simulations, we show that end-to-end aligned silver
nanowires can be used as a controllable splitter for emission from a dipole
emitter.Comment: 5 pages, 4 figure
Determining spectral sensitivity of Kodak Micro Positive Resist 820
The spectral sensitivity of KODAK Micro Positive Resist 820 has been determined for the spectral range of 300nm to 500nm. A xenon-source monochrometer was used in a hard contact exposing system. Se/isitivity is defined as the inverse of the exposure (mj/cm ) needed to produce an image in a photoresist coated plate having walls of 70 normal slope. Low intensity reciprocity law failure has been conclusively shown to exist in this resist with exposure intensities of 100 mw/cm and below. Guide lines have been drawn up, based on the procedures and results of the experimentation, to assist photoresist users in determining the spectral sensitivity of a photoresist. The feasibility of these procedures has been determined to be positive
Aspects of the behavioral and endocrine ontogeny of six moustached tamarins, Saguinus mystax (Callitrichinae)
Deutsche Forschungsgemeinschaft (HE 1870/10-1,2
Observation of spatial quantum correlations induced by multiple scattering of non-classical light
We present the experimental realization of spatial quantum correlations of
photons that are induced by multiple scattering of squeezed light. The quantum
correlation relates photons propagating along two different light trajectories
through the random medium and is infinite in range. Both positive and negative
spatial quantum correlations are observed when varying the quantum state
incident to the multiple scattering medium, and the magnitude of the
correlations is controlled by the number of photons. The experimental results
are in excellent agreement with recent theoretical proposals by implementing
the full quantum model of multiple scattering
A case study of one family's experience with assistive technology
This was a case study of two brothers with autism. This study showed how one school and family worked together to create a positive assistive technology (AT) environment at school, which was transferred to the home environment. It highlighted the experiences of both family and staff members, and described how AT was integrated into the participants' program plans at the beginning of a school year. It also identified highlights and challenges the school team faced in implementing the AT process throughout the school year. Findings isolated key factors, including time for practice, the importance of maintaining a clear focus on objectives, the bond between the home and school, the transfer of strategies and devices between the home and school, and suggested that using AT enhanced learning for both participants
Small business finance in two Chicago minority neighborhoods
The authors use survey data to measure the use of formal and informal sources of financing by owners of small businesses in two ethnic neighborhoods. The authors find substantial differences across ethnic groups in the amount of start-up funding obtained and in the use of trade credit.Small business ; Chicago (Ill.)
Electronic noise-free measurements of squeezed light
We study the implementation of a correlation measurement technique for the
characterization of squeezed light. We show that the sign of the covariance
coefficient revealed from the time resolved correlation data allow us to
distinguish between squeezed, coherent and thermal states. In contrast to the
traditional method of characterizing squeezed light, involving measurement of
the variation of the difference photocurrent, the correlation measurement
method allows to eliminate the contribution of the electronic noise, which
becomes a crucial issue in experiments with dim sources of squeezed light.Comment: submitted for publicatio
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