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19932026
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physics.optics2026

Giant Brillouin gain in frozen CS2 capillaries

Simon Seiderer, Andreas Geilen, Luan N. Sliwa +5

Stimulated Brillouin-Mandelstam scattering offers exceptional capabilities for photonic signal processing, but current platforms demand performance trade-offs between long interact…

physics.optics2026

Broadband THz spectroscopy system beyond 25 THz using BNA crystals and a tunable single-ring-fiber compressor

Wei Cui, Aswin Vishnuradhan, Markus Lippl +4

We present a terahertz (THz) time-domain spectroscopy (THz-TDS) system which accesses a broadband spectrum, efficiently covering the so-called "new THz gap" between 5 and 15 THz an…

physics.optics2025★ 3 cited

Single-shot pulse retrieval of femtosecond bright squeezed vacuum

Yuval Kern, Ido Nisim, Michael Birk +7

Bright squeezed vacuum (BSV) is an intense quantum state of light with zero mean electric field and huge photon number fluctuations, sufficiently intense to drive extreme nonlinear…

physics.optics2025★ 1 cited

Low-coherence interferometry with undetected mid-infrared photons in the high-gain regime

Giovanni Zotti, Dmitri B. Horoshko, Mikhail I. Kolobov +4

We develop a high-parametric-gain SU(1,1) interferometer based on an aperiodically poled Potassium Titanyl Phosphate (apKTP) crystal, enabling frequency-domain low-coherence interf…

physics.optics2025

The analytically tractable zoo of similarity-induced exceptional structures

Anton Montag, Jordan Isaacs, Marcus Stålhammar +1

Exceptional points (EPs) are non-Hermitian spectral degeneracies marking a simultaneous coalescence of eigenvalues and eigenvectors. Despite the fact that multiband -fold EPs (E…

physics.optics2025★ 8 cited

Attosecond physics in optical near fields

Jonas Heimerl, Stefan Meier, Anne Herzig +8

Attosecond science, the electron control by the field of ultrashort laser pulses, is maturing into lightfield-driven electronics, called petahertz electronics. Based on optical fie…