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<p><font size="+1">Dear Wolf and All,<br>
<br>
Vortices are a quite fascinating subject for optical engineers.
I recently published a paper (attached to this mail) about
tailoring wavefronts in order to generate null irradiance along
the optical axis of a system. This is a pure wave optics
approach, light quanta are not needed.<br>
The question of their effect on Young’s fringes is very
interesting. I performed quick simulations with my own wave
optics model that produce the attached images. You should see:<br>
1 - Usual Young’s fringes<br>
2 - Young’s fringes with similar vortex beams of both holes.
Fringes themselves are unchanged, only their luminous envelope
is modified<br>
3 – Same as 2, but adding a Pi phase-shift at one of the two
holes. Forked fringes are appearing, which is in agreement with
the (many) existing experimental results and literature.<br>
I take this opportunity to regret that our SPIE conference “The
nature of light: What are photons?” no longer exists, because I
would certainly have submitted a communication on that topic.
Chandra, is there a chance that this conference returns in 2019
?<br>
<br>
Best Regards,<br>
Francois</font><br>
<br>
</p>
<br>
<div class="moz-cite-prefix">Le 07/04/2018 à 01:56, Wolfgang Baer a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:783b06d8-e436-2927-d71d-4aa17d2e19e0@nascentinc.com">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<p>to All</p>
<p>I was just at the TSC conference where twisted light creating
vertexes was proposed for penetrating tissue <br>
</p>
<p>The pictures presented clearly showed light beams with doughnut
shaped propagation wave fronts.</p>
<p><a class="moz-txt-link-freetext"
href="https://physics.aps.org/articles/v9/105"
moz-do-not-send="true">https://physics.aps.org/articles/v9/105</a><br>
</p>
<p><a class="moz-txt-link-freetext"
href="https://www.ncbi.nlm.nih.gov/pubmed/28964247"
moz-do-not-send="true">https://www.ncbi.nlm.nih.gov/pubmed/28964247</a></p>
<p> I asked the presenter if double slit experiments or single
photon experiments had been done with these light forms.
Apparently the angular momentum of light is theoretically found
when solving Maxwell's equations in cylindrical coordinates ,
but currently uses are for intense beams, but there is no
obvious reason low intensity beams could not show the same
phenomena.</p>
<p>The question of the wave front size of light came up and it was
agreed that this was an open question. I know in our group we
have discussed whether the wave front is contained in the
apparatus and thereby the properties of photons cannot be
separated from the propagation environment boundary conditions.<br>
</p>
<p>Could gravity also form vortecies? Even more intriguing could a
vombination of gravitational and electric fields produce
vortecies?<br>
</p>
<p>Anyone know more about this?</p>
<p>Wolf<br>
</p>
<pre class="moz-signature" cols="72">Dr. Wolfgang Baer
Research Director
Nascent Systems Inc.
tel/fax 831-659-3120/0432
E-mail <a class="moz-txt-link-abbreviated" href="mailto:wolf@NascentInc.com" moz-do-not-send="true">wolf@NascentInc.com</a></pre>
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<pre class="moz-signature" cols="72">--
__________________________________
François Hénault
Ingénieur de Recherche
Institut de Planétologie et d’Astrophysique de Grenoble (IPAG)
UMR CNRS 5274
Bâtiment OSUG-A, Porte 65
414, Rue de la Piscine
Université Grenoble-Alpes - B.P.53
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