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<p><font size="+2">Hi Wolf,</font></p>
<p><font size="+2">Sorry for forgetting the paper, here it is<br>
</font></p>
<p><font size="+2">Unfortunately my model is not usable in starved
photons regime. Intuitively, I would expect a result</font><font
size="+2"> similar</font><font size="+2"> to Tonomura's
experiment, but to my knowledge a vortex experiment with feeble
light remains to be done.<br>
</font></p>
<p><font size="+2">Best Regatds,</font></p>
<p><font size="+2">Francois</font></p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">Le 07/04/2018 à 19:27, Wolfgang Baer a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:37a8de6a-cce3-4094-9ad9-5ff9f5086986@nascentinc.com">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<p>Francios:</p>
<p>Great pictures. Your paper was not attached only three
pictures.</p>
<p>Does your simulation predict the same result for low intensity
(1 photon) vortexes? I was told the vortex is a bulk phenomena
for intense beams.<br>
</p>
<p>I agree with your sentiment <font size="+1">that our SPIE
conference “The nature of light: What are photons?” no longer
exists</font></p>
<p>Thank you</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>
<div class="moz-cite-prefix">On 4/7/2018 9:47 AM, Francois Henault
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:b830ac94-e04b-5e65-afac-e6703e0c4e8a@univ-grenoble-alpes.fr">
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
<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
F-38041 Grenoble Cedex 9
Tel: +33 (0)4 76 63 57 78
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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
F-38041 Grenoble Cedex 9
Tel: +33 (0)4 76 63 57 78
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