Tootfinder

Development of a High-Doppler Shift Optical Simulator to Test Femtosecond-Level Optical Time-Frequency Transfer
Matthew S. Bigelow, Kyle W. Martin, Nolan Matthews, Benjamin K. Stuhl, Richard Gonzales, Alexandre de Pinho e Braga, John Elgin, Kimberly A. Frey
https://arxiv.org/abs/2509.13976

Development of a High-Doppler Shift Optical Simulator to Test Femtosecond-Level Optical Time-Frequency Transfer
We have developed an optical simulator to test optical two-way time-frequency transfer (O-TWTFT) at the femtosecond level capable of simulating relative motion between two linked optical clock nodes up to Mach 1.8 with no moving parts. The technique is enabled by artificially Doppler shifting femtosecond pulses from auxiliary stabilized optical frequency combs. These pulses are exchanged between the nodes to simulate the Doppler shifts observed from a changing optical path length. We can contin…

Leveraging the RETFound foundation model for optic disc segmentation in retinal images
Zhenyi Zhao, Muthu Rama Krishnan Mookiah, Emanuele Trucco
https://arxiv.org/abs/2508.11354

Leveraging the RETFound foundation model for optic disc segmentation in retinal images
RETFound is a well-known foundation model (FM) developed for fundus camera and optical coherence tomography images. It has shown promising performance across multiple datasets in diagnosing diseases, both eye-specific and systemic, from retinal images. However, to our best knowledge, it has not been used for other tasks. We present the first adaptation of RETFound for optic disc segmentation, a ubiquitous and foundational task in retinal image analysis. The resulting segmentation system outperf…

Trap-to-trap free falls with an optically levitated nanoparticle
M. Luisa Mattana, Nicola Carlon Zambon, Massimiliano Rossi, Eric Bonvin, Louisiane Devaud, Martin Frimmer, Lukas Novotny
https://arxiv.org/abs/2507.12995

Trap-to-trap free falls with an optically levitated nanoparticle
We perform free-fall experiments with a charge-neutral, optically levitated nanoparticle. This is achieved using an optical tweezer that can be rapidly toggled on and off and vertically displaced, enabling the particle to be released and recaptured after each free fall. The particle is insensitive to electric fields due to its charge neutrality and, during free evolution, is not subject to photon recoil heating. We achieve free-fall durations of up to 0.25 ms and observe a nearly two hundred-fo…

Magic Keyboard fürs iPad Air mit neuer Farbe
Es muss nicht immer ein iPad Pro sein: Wer ein Air besitzt, kann es nun mit einer optisch neuen Tastatur- und Trackpad-Kombi ausrüsten.
https://www.he…

Low-complexity CV-QKD system with optical pilot-tone local oscillator synchronization
Samael Sarmiento, Jeison Tabares, Sebastian Etcheverry
https://arxiv.org/abs/2509.12735 htt…

Low-complexity CV-QKD system with optical pilot-tone local oscillator synchronization
This study presents a comprehensive simulation-based analysis of optical pilot tone generation for local oscillator synchronization in continuous-variable quantum key distribution (CV-QKD) systems using Gaussian-modulated (GM) coherent states. We compare system performance when the pilot tone is generated either electrically or optically, examining the effects of key parameters such as pilot tone power, laser linewidth, digital-to-analog converter resolution, and link distance. The results prov…

Replaced article(s) found for physics.optics. https://arxiv.org/list/physics.optics/new
[1/1]:
- All Optical Echo State Network Reservoir Computing
Ishwar S Kaushik, Peter J Ehlers, Daniel Soh

Crosslisted article(s) found for physics.optics. https://arxiv.org/list/physics.optics/new
[1/1]:
- Nonclassical Driven-Dissipative Dynamics in Collective Quantum Optics
Alejandro Vivas-Via\~na

The Effect of Permanent Dipoles on Dark States in Molecular Dimers
Matthew Freed, Dominic M. Rouse, Andrea Rocco, Jim Al-Khalili, Marian Florescu, Adam Burgess
https://arxiv.org/abs/2508.11445

The Effect of Permanent Dipoles on Dark States in Molecular Dimers
Many organic molecules possess large permanent dipole moments that differ depending on the electronic state. These permanent dipoles influence both intermolecular coupling and interactions with the optical fields, yet they are often neglected in typical theoretical quantum optics treatments. Here, we investigate the optical properties and their effect on dark states of dimers possessing such permanent dipoles. We show that when monomers have excitation-dependent permanent dipoles, optical trans…

Crosslisted article(s) found for physics.optics. https://arxiv.org/list/physics.optics/new
[1/1]:
- Tunable optical emissions of Eu3 ions enabled by pressure-driven phase transition in ZnO
C. Ianhez-Pereira, U. F. Kaneko, A. D. Rodrigues, I. S. S. de Oliveira, M. P. F. de …