Mariusz Klimczak

@mklimczak.bsky.social

An academic, teaching physics to freshmen students at a major university, also research: special optical fibers, nonlinear optics, diamonds and very, very small magnetic fields. University of Warsaw, Poland
#academia
#physics
#optics
#photonics .. more

Videos

Engineering 60%

Physics 28%

Posts Replies Media Videos

Mariusz Klimczak @mklimczak.bsky.social · 8d

Working on my tenure application. Reviewing past results I came across a sweet gem, when a Western, advanced laser company took note of the results which I obtained in lab together with my first PhD student (now a doctor) Anupamaa Rampur. Ehh, sweet times.

www.menlosystems.com/news/extreme...

Menlo Systems Laser Drives Low-Noise Thulium Amplifier

Researchers in Warsaw and Bern used Menlo Systems’ C-Fiber 780 laser to seed a thulium amplifier, generating stable 96-fs pulses at 1900 nm.

www.menlosystems.com

Mariusz Klimczak @mklimczak.bsky.social · 12d

Second order rainbow over Faculty of Physics at University of Warsaw earlier this afternoon😍 #physics #optics

Primary and secondary rainbow seen over rooftops of University of Warsaw

Mariusz Klimczak @mklimczak.bsky.social · Oct 11

I’ve been reading a popular science monthly magazine DELTA. It has been run since 1974 by University of Warsaw. Delta traditionally covers maths, physics and astronomy. It is in Polish, but OA and getting it translated shouldn’t be a problem;-)
www.deltami.edu.pl
#physics #maths #popularscience

Delta - Strona główna

www.deltami.edu.pl

Mariusz Klimczak @mklimczak.bsky.social · Oct 7

Looks preliminary to say the least, I know, but to me it's beautiful. After trying hard for some time, we learned to take proper polarization resolved measurements of nonlinear optical response of our epitaxial BN films 8-)
#nonlinearoptics #photonics #optics

A rough, three-axis polar plot of Second harmonic generation intensity dep. on incident polarization of the fundamental.

Mariusz Klimczak @mklimczak.bsky.social · Sep 20

They look beautiful. Congrats. Very popular in Poland, as well, e.g. kukbuk.pl/artykuly/ran...

Ranking: najlepsze pączki w Warszawie

W tłusty czwartek kolejki w cukierniach potrafią ciągnąć się bez końca. W których z nich rzeczywiście warto się ustawić, by zjeść najlepsze pączki?

kukbuk.pl

Mariusz Klimczak @mklimczak.bsky.social · Sep 20

Our paper on diamond–silica interfaces under localized laser vitrification got published.
We show how heat-driven diamond decomposition and altering of the silica. Context: distributed optical magnetometry, Kerr nonlinearity shaping.
OA: doi.org/10.1016/j.ce...
#Diamond #Fibers #Optics #Physics

Reposted by Elizabeth Saunders, Tim Bale, Michael Kevane , and 4 more Elizabeth Saunders, Tim Bale, Michael Kevane, Mariusz Klimczak, Nicolai von Ondarza, Maksym Polyakov, Maria Sobolewska

Donald Tusk @donald-tusk.bsky.social · Sep 10

Last night the Polish airspace was violated by a huge number of Russian drones. Those drones that posed a direct threat were shot down. I am in constant communication with the Secretary General of NATO and our allies.

Mariusz Klimczak @mklimczak.bsky.social · Sep 8

The paper just got Editor's Pick from @optica.org OPEX Editor ;-)

Reposted by Pitirim A. Sorokin, Mariusz Klimczak

Donald Tusk @donald-tusk.bsky.social · Sep 7

The Russian attack on Kyiv’s government buildings shows again that the continued delaying a strong reaction against Putin and the attempts to appease him makes no sense. The US and Europe must together force Russia to accept an immediate ceasefire. We have all the instruments.

Mariusz Klimczak @mklimczak.bsky.social · Sep 5

Hoping that a new paper would be a good come-back:
opg.optica.org/oe/fulltext....
It’s about nano-diamonds and detecting small magnetic fields with light. The diamonds are inside an optical fiber. You could imagine placing it at a harbor entrance to detect hostile submerged drones.
#physics #optics

A schematic: an optical fiber with two coils at each end and a magnet bar in the middle underneath.

Mariusz Klimczak @mklimczak.bsky.social · Mar 29

As CLEO Europe have emailed their abstract notifications to contributors, it looks like I would be getting an opportunity to see/meet some of you in person this June ;-)

Reposted by Mariusz Klimczak

Narodowe Centrum Nauki @ncn.gov.pl · Mar 13

🔬"Science is not a business plan. All ambitious research involves risk," says Dr. Krzysztof Szade, a biochemist from
@jagiellonskiuni.bsky.social. In conversation with
@annakorzekwa.bsky.social, he discusses scientific challenges and #NCN & @erc.europa.eu projects. ncn.gov.pl/en/aktualnos...

Mariusz Klimczak @mklimczak.bsky.social · Feb 3

Thanks for the feedback. Ppl at masto suggested plenty of alternatives to overleaf but at a rather pro level. I also gathered a list of what people use as their local installs. I followed my "local" advice and installed MikTex.

Mariusz Klimczak @mklimczak.bsky.social · Jan 29

To all the latex pros out there: what would be your recommended alternative to overleaf? „None” would also be a feedback, I could pull some overheads for the subscription, as long as my project lasts.

Mariusz Klimczak @mklimczak.bsky.social · Jan 29

Believe it or not, my CLEO Europe submission done last week was the first meaningful doc I prepared entirely in latex (overleaf). It is better late than never, but in my case it is also a sign of being a PI in a true sense, ie „nobody” is going to tell me not to because they are used to ms word.

part.case

Reposted by Mariusz Klimczak

Florian Marquardt @fmarquardtgroup.fediscience.org.ap.brid.gy · Jan 29

Please share: Our Max Planck Institute recently left X and is present here on Mastodon. Give them a follow! Beautiful pictures from the science of light!

#mastodon #physics #science #light #quantum #optics #photonics #pictures

@maxplanckgesellschaft

From: @MPI_ScienceOfLight […]

Original post on fediscience.org

fediscience.org

Mariusz Klimczak @mklimczak.bsky.social · Jan 26

Yep, dont worry Coco, even an impostor like me landed it 😅

Mariusz Klimczak @mklimczak.bsky.social · Jan 26

Geographic constraints are tertiary at best when compared to the personal ones. In addition to that, such a cascade poses a critical career risk if at some point a forty-something „postdoc” slips. I’m so happy to have broken out of this dead circle. Also helped our mutual friend achieve the same:)

Reposted by Mariusz Klimczak

Donald Tusk @donald-tusk.bsky.social · Jan 26

The words we heard from the main actors of the AfD rally about “Great Germany” and “the need to forget German guilt for Nazi crimes” sounded all too familiar and ominous. Especially only hours before the anniversary of the liberation of Auschwitz.

Mariusz Klimczak @mklimczak.bsky.social · Jan 2

In fifth grade they don’t. 😒 I’ll cut that strand myself tomorrow.

Mariusz Klimczak @mklimczak.bsky.social · Jan 2

In transmission, like a „grating”? I’ll get a strand soon, haircut is coming. Hope my gray hiar would be as good 😹

Mariusz Klimczak @mklimczak.bsky.social · Jan 2

Single-slit experiment at home for my fifth-grader. I know this could be generally improved, but this is what comes out with a rough setting up of two razor blades with a masking tape, a ruler and some lego. Must admit that the camera shows this much better than my actual vision.

$Laser light diffraction fringes and a single slit made of two razor blades.$

Reposted by Mariusz Klimczak

Donald Tusk @donald-tusk.bsky.social · Dec 8

The events in Syria have made the world realise once again, or at least they should, that even the most cruel regime may fall and that Russia and its allies can be defeated.

Mariusz Klimczak @mklimczak.bsky.social · Dec 7

Dirichlet function, I know. It’s not the point.💁‍♂️

Mariusz Klimczak @mklimczak.bsky.social · Dec 7

A function taking y=1 for rational x and y=-1 for irrational x is discontinuous for every x. If you tried to plot it, it would look like two line-thin clouds of points at y equals either 1 or -1. I cannot shake this off tonight 🤔

Mariusz Klimczak @mklimczak.bsky.social · Nov 24

👍

Mariusz Klimczak @mklimczak.bsky.social · Nov 22

Coming back to WAW from WRO after a successful phd viva where I was one of the revs. 4h train ride and me happy that I will age less than by 4h owing to general relativity 🤓

My left hand holding Andrzej Dragan’s book „Kwantechizm” on a popular take on general relativity, taken on a train

Mariusz Klimczak @mklimczak.bsky.social · Nov 17

Prime Minister of Poland just joined bluesky. I love this, but that also means fedi - bsky 0:1 for a Pole like myself :-(

Mariusz Klimczak @mklimczak.bsky.social · Nov 11

11.11 We are independent, we are Poles!

Mariusz Klimczak @mklimczak.bsky.social · Nov 11

Great to see you again over here John 😀

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