iiinova — where your digital self keeps evolving

Chinna Devarapu @chinnadevarapu.bsky.social · 23/02/2026

💡Our paper "Dispersion-engineered Floquet-Bloch phonon polaritons for extreme infrared beam control" is accepted! Polaritonic materials are thought to be unusable for light control, but we show that periodic structuring makes these materials actually quite useful. Read here: lnkd.in/d8-GT4QY

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Chinna Devarapu @chinnadevarapu.bsky.social · 09/12/2025

Following my recent announcement of Frontiers for the Future Award, I'm pleased to share the opening of #PhD position. Deadline: 25 January 2026 Full details and application information are available on euraxess.ec.europa.eu/jobs/393670 #PhD #Photonics #LaserPhysics 💡

euraxess.ec.europa.eu

PhD Studentship in Integrated Lasers for Optical Coherence Tomography, CAPPA Centre

Overview of the CAPPA Centre:

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Chinna Devarapu @chinnadevarapu.bsky.social · 07/12/2025

Following my recent announcement of Frontiers for the Future Award, I'm pleased to share opening of #Postdoc position Deadline: 5 January 2026 Full details & application information are available on lnkd.in/ejGnG7MU #PostdocPosition #Photonics #LaserPhysics #OCT #INSPIRATION #JobOpportunity

lnkd.in

This link will take you to a page that’s not on LinkedIn

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Chinna Devarapu @chinnadevarapu.bsky.social · 02/12/2025

I am pleased to announce that I have been awarded a Research Ireland Frontiers for the Future grant to develop a novel swept-source laser for Optical Coherence Tomography (OCT). #Photonics #OCT #PhDPosition #PostdocPosition #ResearchIreland💡

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drmkn.bsky.social @drmkn.bsky.social · 23/10/2025

Call for data for survey of CCD spectrometers. Do you have a CCD spectrometer? If you do, would you please collect two fluorescent lamp spectra and send me the data in ascii format. One with the 546nm just a little bit below saturation and another at about 1/4 of that intensity. Thank you.

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drmkn.bsky.social @drmkn.bsky.social · 21/10/2025

TCD1304 or S11639-01 Why you might choose the TCD1304 over the S11639-01 in most instances. 1) TCD1304DG $18 on Digikey, vs $200 to $450, and not found even on octapart. 2) Response spectrum, S11639-01 left, TCD1304DG right - self explanatory.

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SPIE @spie.org · 11/10/2025

Teams from Johns Hopkins University & @bostonu.bsky.social demonstrate a retina imaging technique that digitally refocuses scans after capture. It removes the need for precise alignment, delivering sharper images & faster diagnosis. 👁️ #BiophotonicsDiscovery #Optics Read more: bit.ly/4mZ34Kq

Diagram illustrating the process of capturing and reconstructing images using a diffuser fundus camera, starting from a schematic of the human eye through to a sensor capturing a raw image.

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Chinna Devarapu @chinnadevarapu.bsky.social · 01/10/2025

The best of 3D-printers is here, by hacking them into lab equipment

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Alfred Millett-Sikking @amsikking.bsky.social · 28/09/2025

The culmination of many years work. One of the most advanced light-sheet microscopes in the world! -> A large field of view Snouty light-sheet microscope, with any immersion remote refocus and real-time multi-angle projections! For details see previous posts and here: github.com/amsikking/HT...

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Chinna Devarapu @chinnadevarapu.bsky.social · 27/09/2025

I've been tracking low-cost spectrometers on AliExpress, but when I come across these ~$300 spectrophotometers, that closely resembles Ocean Optics' Czerny-Turner optical layout, I am very impressed.

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Leonhard Bandilla @lbandilla.bsky.social · 27/09/2025

There are so many budget friendly portable spectrometers available, I thought I'd post some photos of when I opened one, an hopocolor HPSC330, to replace the battery and recalibrate it afterwards. It seems to use a crosses Czerny-Turner geometry with a linear CCD

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Chinna Devarapu @chinnadevarapu.bsky.social · 20/09/2025

1/3 We just turned a $25 fitness tracker into a water quality monitoring device (Colorx). The results are now published. doi.org/10.3390/s251... This is a follow-up of our ODX paper where we hacked a #fitnesstracker for bacterial growth monitoring. #WaterQuality #Sensors #odx

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Jeff Geerling @jeffgeerling.com · 12/09/2025

PIS IN SPACE! Today's video on CubeSats was over a year in the making—and deals with two of my favorite things: Raspberry Pis, and space! Also making a special guest appearance is Gabe from saveitforparts, using SDR to track sats: www.youtube.com/watch?v=qvN3...

youtube.com

PIS IN SPACE!

YouTube video by Jeff Geerling

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Mae Dean @maegodhavemercy.com · 05/09/2025

HELL YES. Proof of concept for PWM (Pulse Wave Modulation) dimming of an inductive LED using a MOSFET as the gate! This isn’t the final pulse cycle - I’ll tweak that tomorrow, but it’s getting the full brightness and doing the dimming seamlessly! Woohoo!

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Rachel Grange @rachelgrange.bsky.social · 10/11/2024

Back for a little while here, I tried this ‘starter pack’ for photonics & optics people: anyone else can follow up to 50 people at the click of a button: go.bsky.app/QrtPj7R. Put your name below and I will add you to the pack.

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Chinna Devarapu @chinnadevarapu.bsky.social · 03/07/2025

1/8 🧵 Update on the Pocket #Spectrometer project. Been working on upgrading from the AS7341 to AS7343 sensor. The #AS7341 worked well but only had 9 channels. The #AS7343 offers 12 channels which should be better for #colorimetric analysis. #OpenSource 💡

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Mikhail Kats @mickeykats.bsky.social · 16/06/2025

Our paper, "A gradient atmospheric model reveals enhanced radiative cooling potential and demonstrates the advantages of broadband emitters", is now online in Laser & Photonics Reviews. The work was led by Yeonghoon Jin onlinelibrary.wiley.com/doi/10.1002/... 🧪💡

onlinelibrary.wiley.com

A Gradient Atmospheric Model Reveals Enhanced Radiative Cooling Potential and Demonstrates the Advantages of Broadband Emitters

We introduced a model for sky-facing radiative cooling that accounts for altitude-dependent temperature and gas composition at specific times and locations on Earth. Our results suggest that radiativ....

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Chinna Devarapu @chinnadevarapu.bsky.social · 30/04/2025

📢 #Postdoc opportunity! Join our team through Sustain-FIT Marie Curie fellowships for cutting-edge gas sensing technology 💡. 3-year funded position with industry secondment. We are happy to support your application through MTU! DM with project idea + CV. lnkd.in/e2GtiY3m

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Chinna Devarapu @chinnadevarapu.bsky.social · 22/05/2025

We’re hiring 4 Marie Skłodowska-Curie #PhD fellows in the PROTEMIC network — combining integrated photonics, mid-IR lasers, and protein spectroscopy for real-time, label-free protein. Deadline is very close, apply soon. Details : protemic.eu

protemic.eu

PROTEMIC – Integrated Spectroscopy for Protein Analysis

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OpenFlexure @openflexure.bsky.social · 12/05/2025

Congratulations to the Biomanufacturing Group at ICGEB for winning a best exhibit prize at Maker Faire Trieste yesterday! 🏆 Their award-winning exhibit featured a number of OpenFlexure Microscopes, and aimed at help make biology accessible to everyone. 🔬

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Chinna Devarapu @chinnadevarapu.bsky.social · 07/05/2025

Anyone have @Arxiv account that can kindly endorse me? For Physics-Optics 💡 (Endorsement Code: M9IJFY), for Instrumentation 🔬 (Endorsement Code: QMHGJO)

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Chinna Devarapu @chinnadevarapu.bsky.social · 30/04/2025

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Will Anderson @willaanderson.bsky.social · 25/04/2025

Currently preparing 10 #DIYNAFLUOR kits for grade 10 students to assemble as a part of a science outreach program run by my institute. They will use the DIYNAFLOUR to quantify fluorescent nanoparticles they get to synthesize. (Wish I got to do this when I was 15. 😅 🦕)

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Chinna Devarapu @chinnadevarapu.bsky.social · 20/04/2025

Working on a web app that works with both mobiles and desktop. Follow this space for more updates on this #spectrophotometer 💡 bsky.app/profile/chin...

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Chinna Devarapu @chinnadevarapu.bsky.social · 10/04/2025

Hello 💡community, recently I saw a post most likely on LinkedIn comparing different #FDTD softwares, both open source and commercial ones. It’s like a table. If anyone finds it please post it here.

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Chinna Devarapu @chinnadevarapu.bsky.social · 07/04/2025

1/14: As a DIY enthusiast who loves #spectrometers and💡, I am excited to share the story of LaoKang, a Chinese maker who turned a #DIY hobby project into a €67 #spectroscopy product. His "Garden Spectrometer" is making spectroscopy accessible by bringing a €1000+ tool for under €67 ($75)🧵👇.

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Chinna Devarapu @chinnadevarapu.bsky.social · 27/03/2025

If you are in Europe, get this cute microscope for just €5 at #smythtoys. It has illumination, color filters, multiple lenses, and prepared slides. I'm modifying it with an #ESP-CAM and scanning stage to make automated #diy scanning microscope.

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Brandon Scott @minesbioimaging.bsky.social · 26/03/2025

Look at those lil flags spin! We can now control up to 8 syringe pumps off two UART lines on the ESP32 board. Comes complete with a web app to adjust flow rate, turns pumps on and off, and runs sequences. #automateAllTheThings

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Alfred Millett-Sikking @amsikking.bsky.social · 10/03/2025

Stage Wars - Episode 1: How fast is your microscope XY stage? Does it matter? -> Here I race 3 very different stages over a 384 well plate to get an average time per move: 1) Lead screw motor 7mm/s: 0.959s 2) Piezo linear motor 120mm/s: 0.436s 3) Magnetic linear motor 750mm/s: 0.294s So about 3x?

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Chinna Devarapu @chinnadevarapu.bsky.social · 09/03/2025

1/6 🧵 Excited to share Pocket Spectrometer V2! After positive feedback on the first version of pocket spectrometer. I've made significant improvements (hardware+software) while keeping what worked well with the V1 #OpenSource #Spectrometer #STEM 💡 bsky.app/profile/chin...

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Chinna Devarapu @chinnadevarapu.bsky.social · 15/01/2025

We have 4 new post-doc openings in our CAPPA research group at MTU. Very interesting projects including meta optics 💡. Deadline is 24th Jan lnkd.in/emKyJKbg www.mtu.ie/vacancies #HiringNow #Photonics #Optics #ImagingSystems #ResearchOpportunities #MTU

lnkd.in

This link will take you to a page that’s not on LinkedIn

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Chinna Devarapu @chinnadevarapu.bsky.social · 10/01/2025

PhD Opportunities! Apply soon! Deadline 31st January. EU-funded MSCA doctoral network PROTEMIC is now recruiting 12 PhD candidates for research in integrated spectroscopy for protein analysis. apply here: protemic.eu/apply/ #Jobs #PhDposition #academia #Research

protemic.eu

Apply – PROTEMIC

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Will Anderson @willaanderson.bsky.social · 17/12/2024

A Preprint for our ~$40 USD, open source, 3D printed DNA Fluorometer, the #DIYNAFLUOR, has just been posted to bioRxiv outlining its performance and applications for #eDNA analysis!🦕🧪🧬 A big thanks to all the co-authors! Preprint www.biorxiv.org/content/10.1... Git tinyurl.com/yfh33dsx #science

biorxiv.org

DIYNAFLUOR: An Affordable DIY Plug-and-Play Nucleic Acid Fluorometer for eDNA Quantification in Resource Limited Settings

Nucleic Acid (NA) fluorometry is widely employed for quantifying environmental DNA (eDNA) samples and their downstream DNA sequencing libraries, owing to its sensitivity, accuracy, and speed. However,...

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Jacopo Bertolotti @jacopobertolotti.com · 17/12/2024

Plants play a LOT of clever tricks with light (beyond that little miracle that is photosynthesis). If the topic interest you, there is a #PhD position open to work on it with Dr. Rox Middleton (a very bright young researcher at @uniofbath.bsky.social) #PhDjobs botphot.com/wp-content/u...

botphot.com

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Chinna Devarapu @chinnadevarapu.bsky.social · 13/12/2024

(1/6) A 💡🧵 about a recent (open access) paper that reveals how certain seashells engineered natural windows to capture sunlight - similar to how a greenhouse works. A fascinating story of natural engineering from @reallymccoy.bsky.social's team www.nature.com/articles/s41...

nature.com

Heart cockle shells transmit sunlight to photosymbiotic algae using bundled fiber optic cables and condensing lenses - Nature Communications

Some bivalves have evolved photosynthetic symbioses. Here, the authors show that heart cockles transmit light through their upper shell to internal photosynthetic symbionts, using mineral fiber optic ...

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Chinna Devarapu @chinnadevarapu.bsky.social · 10/12/2024

1/7 Just read a fascinating paper by @tawfiquehasan.bsky.social‬ breaking a fundamental spectrometer trade-off between resolution & sensitivity using metasurfaces. They demonstrated this working in super-challenging conditions - even doing astronomy through clouds! www.science.org/doi/10.1126/...

science.org

Metasurface spectrometers beyond resolution-sensitivity constraints

Miniaturized metasurface spectrometers deliver both high resolution and high sensitivity.

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Tawfique Hasan @tawfiquehasan.bsky.social · 10/12/2024

Our work in Science Advances on #BIC #metasurface spectrometers overcomes resolution-sensitivity trade-off. We achieve high light throughput, ideal for ultra-low-light applications like fluorescence & astrophotonic spectroscopy. doi.org/10.1126/scia...

doi.org

Metasurface spectrometers beyond resolution-sensitivity constraints

Miniaturized metasurface spectrometers deliver both high resolution and high sensitivity.

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Chinna Devarapu @chinnadevarapu.bsky.social · 09/12/2024

These are so helpful for most of the physics students as well as teachers.

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Chinna Devarapu @chinnadevarapu.bsky.social · 03/12/2024

💡 AMS Osram & Fraunhofer's headlight design wins Deutscher Zukunftspreis 2024! The headlight is a 25,600-LED matrix that be effectively a video projector. Currently, it displays safety warnings etc. May be we can watch Netflix on the road soon 🤷‍♂️ www.wileyindustrynews.com/en/news/ams-...

wileyindustrynews.com

AMS Osram and Fraunhofer IZM win Deutscher Zukunftspreis | wileyindustrynews.com

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Mikhail Kats @mickeykats.bsky.social · 02/12/2024

New preprint! "All-passive upconversion imaging of incoherent near-infrared light at intensities down to 50 nW/cm^2" arxiv.org/abs/2411.18707 🧪💡 This was a large collaborative work led by Rabeeya Hamid in our group, in collaboration with Dan Congreve's group at Stanford, and supported by DARPA

Output visible power vs NIR input power, as well as vs NIR intensity. This is upconversion from a wavelength range of 750 - 930 nm to the visible, peaking at 610 nm

Images show upconversion imaging of the Air Force target, university logos, and small flowers that were illuminated by a broadband NIR LED. The little white box is where the upconversion is enhanced using plasmonic resonators

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Chinna Devarapu @chinnadevarapu.bsky.social · 25/11/2024

1/6 🧵 I'm building what might be the smallest #opensource #spectrometer with an easy to use UI! I call it a pocket spectrometer. Combining #M5StickC (~$20) with AS7341 sensor (~$16). My goal? A complete spectrometer that is barely larger than a sample cuvette itself.

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