scholarly journals Shifts of Coherent Light Beams on Reflection at Plane Interfaces between Isotropic Media

1980 ◽  
Vol 33 (2) ◽  
pp. 319 ◽  
Author(s):  
RG Turner
Keyword(s):  
Large Range ◽  
Polarization State ◽  
Incident Beam ◽  
Theoretical Work ◽  
Beam Profile ◽  
Theoretical Treatment ◽  
Coherent Light ◽  
Theoretical Approaches ◽  
Isotropic Media ◽  
Light Beams

Previous experimental and theoretical work on both longitudinal and transverse shifts of light beams at totally reflecting interfaces is briefly reviewed and the discrepancy between the predictions of the two principal theoretical approaches is discussed. A theoretical treatment, valid for an interface between any two media, is presented. The intensity profile of the reflected beam is the same as that of the incident beam (albeit shifted in the reflecting interface) only for certain polarization states of the incident beam and provided that the reflection parameters of the interface meet certain conditions. If these conditions are not met the reflected beam profile suffers distortion and, possibly, deviation from its expected direction. Because the polarization state of a beam is, in general, altered by reflection, measurements of the shifts over a large range of angles of incidence at a single reflection are needed in order to verify the predictions.

X.—Remarks on Coincidence Experiments with Visible Light

1962 ◽  
Vol 66 (2) ◽  
pp. 111-115
Author(s):  
Z. Bay ◽  
P. S. Farago
Keyword(s):  
Quantum Theory ◽  
Visible Light ◽  
The Other ◽  
Coherent Light ◽  
Quadratic Effect ◽  
Linear Effect ◽  
Negative Results ◽  
Light Beams

SynopsisAfter the detection of correlations in two coherent light beams by Hanbury Brown and Twiss, objections were raised by Brannen and Ferguson on the basis of the experiments of Adam, Janossy and Varga and their own experiments in which no correlations were detected. It is pointed out here that the different groups were looking for two entirely different effects, one being quadratic, the other one linear in the number of photons involved; the quadratic effect (discovered by Hanbury Brown and Twiss) is in agreement with quantum theory while the linear effect is not. It was shown by Purcell and by Hanbury Brown and Twiss that the choice of parameters in the experiments which gave negative results was inadequate to show the quadratic effect. It is shown in this paper that their experiments were also inadequate to decide between the existence or nonexistence of the linear effect.

Optoelectronic system of prompting and stabilizing coherent light beams in a given point of an eye

1996 ◽  
Author(s):  
Yuri G. Danik ◽  
Vladimir I. Karpenko ◽  
Svyatoslav N. Fyodorov ◽  
Vladimir I. Turin ◽  
Olga E. Zaslavskaya ◽  
...  
Keyword(s):  
Coherent Light ◽  
Optoelectronic System ◽  
Light Beams

scholarly journals Imaging Mueller matrix determination of transparent, unpolarizing samples using a classically entangled polarization state

2018 ◽  
Vol 64 (4) ◽  
pp. 407
Author(s):  
Jacqueline Isamar Muro-Ríos ◽  
R. Espinosa-Luna
Keyword(s):  
Open Space ◽  
Polarization State ◽  
Theoretical Work ◽  
Mueller Matrix ◽  
Experimental Setup ◽  
Wave Plate ◽  
Recent Theoretical Work ◽  
Study Results ◽  
Theoretical Proposal

Inspired in a recent theoretical work for the determination of the Mueller matrix, using as incidence a single classically entangled polarization state (F. Töppel et al., New J. Phys. 16 (2014) 073019), an experimental setup is proposed and tested.  The open space and two wave plate retarders are used as the transparent, nondepolarizing samples under study. Results show some experimental improvements are necessary in order to implement accurately the theoretical proposal in which this work is based.

scholarly journals On the relativity of old and new media: A lifeworld perspective

2019 ◽  
Vol 25 (4) ◽  
pp. 657-672 ◽  
Author(s):  
Manuel Menke ◽  
Christian Schwarzenegger
Keyword(s):  
New Media ◽  
Empirical Data ◽  
Theoretical Work ◽  
Daily Basis ◽  
Communication Studies ◽  
Theoretical Approaches ◽  
Media Change ◽  
Media And Communication ◽  
Depth Interviews ◽  
Accurate Observation

It is an old, yet, accurate observation that the ‘newness’ of media is and most probably will continue to be a catalyst for research in media and communication studies. At the same time, there are numerous academic voices who stress that studying media change demands an awareness of the complexities at play interweaving the new with the old and the changes with the continuities. Over the last decades, compelling theoretical approaches and conceptualizations were introduced that aimed at grasping what defines old and new media under the conditions of complex, disruptive media change. Drawing from this theoretical work, we propose an empirical approach that departs from the perception of media users and how they make sense of media in their everyday affairs. The article argues that an inquiry of media change has to ground the construction of media as old or new in the context of lifeworlds in which media deeply affect users on a daily basis from early on. The concept of media ideology (Gershon, 2010a, 2010b) is used to investigate notions of ‘oldness’ and ‘newness’ people develop when they renegotiate the meaning of media for themselves or collectively with others. Based on empirical data from 35 in-depth interviews, distinct ways how the relativity but also relationality of old and new media are shaped against each other are identified. In the analysis, the article focuses on the aspects of rhetoric, everyday experiences, and emotions as well as on media generations, all of which inform media ideologies and thereby influence how media users define old and new media.

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