📢#Europhoton: The call for paper is now open!

This conference focuses on the latest advances in solid-state, #fibre and #waveguide #light sources.

Europhoton 2026 will be held in Arcachon, France, from 21 to 25 September 2026.

✍️https://europhoton.org/submit
#physics #conference

Meta RayBan AR Glasses Shows Lumus Waveguide Structures in Leaked Video

https://kguttag.com/2025/09/16/meta-rayban-ar-glasses-shows-lumus-waveguide-structures-in-leaked-video/

#HackerNews #MetaRayBan #AR #Lumus #Waveguide #LeakedVideo #TechInnovation

I am pleased to share that I successfully coupled the laser radiation into the chip.

After two weeks of learning about the concepts of the micro-ring resonators (#MRR) and attempting to capture the resonances, I finally achieved my goal.

The main challenge I faced was accurately cutting the optical fiber and determining the optimal distance and angle between the fiber and the #waveguide for effective coupling. This process required a significant amount of trial and error. Additionally, for an entire week, I unknowingly worked with a chip that had broken couplers. When I adjusted the z-axis, I accidentally damaged the couplers with the fiber. Fortunately, I have a sufficient number of chips available for multiple trials.

#biosensor #bioelectronic #microelectronic @JLBe @tuberlin

How does a real chip with a microring resonator (#MRR) look like? 🤔

The #MRR were fabricated on #silicon wafers, with each chip measuring 2.15 by 1.05 cm. The surface of the chips has designated areas where the laser source can be coupled into the #waveguide known as the coupler. After the light passes through the #waveguide and into the MRRs, it is decoupled through an area called the decoupler. The analysis of this radiation by an oscilloscope allows the refractive index to be determined.

Between the coupler and decoupler zones, there are five #MRR structures designed to obtain information on four different analytes, with one structure serving as a reference 🤯.

#biosensor #bioelectronic @JLBe @tuberlin

Got pulled down a rabbit hole learning about Schumann resonances, which are electromagnetic wave resonances in the atmosphere because the area between the earth's surface and the ionosphere acts as a spherical waveguide. The energy input is from lightning, which is practically continuous (50 strikes/s) when viewed worldwide. The fundamental frequency involved is 7.83 Hz, with various weaker harmonics above that.

How I got pulled into the rabbit hole...

Of *course* people are selling woo / magic / New Age B.S. around this stuff. But I'm sorry to say, your little trace-printed-on-a-PCB antenna supposedly broadcasting on this frequency to boost its "natural healing properties" is not going to be an effective radiator at sub-8 Hz, even if you turn it into a spiral to make it longer. The wavelength of the 7.83 Hz fundamental is ~38,000 km, so a basic quarter-wave antenna should be >9000 km long...

#woo #magic #NewAge #crystals #healing #BS #scam #RabbitHole #Schumann #SchumannResonance #electromagnetic #ionosphere #waveguide

Ars Technica probably has the deepest details on these ‘normal’ AR glasses appearing at this winters CES, RayNeo x3 Pro. They are $1500.

It would be nice to see a YouTube video of them in action if that’s possible. Not sure how you can manipulate the projection optics to focus that near to the eye. A focus ‘set up’ routine?

Does Wikipedia have an article on ‘waveguide’?

#waveguide #rayNeo #ARglasses