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The evolution versus pump power of the spectrum of a singly resonant optical parametric oscillator based on an MgO-doped periodically poled stoichiometric lithium tantalate crystal is observed. The onset of cascade Raman lasing due to…

Optics · Physics 2015-05-13 T-H. My , O. Robin , O. Mhibik , C. Drag , F. Bretenaker

We discuss the effects of noise on the timing and strength of superradiant Raman scattering from a small dense sample of atoms. We demonstrate a genuine quantum stochastic resonance effect, where the atomic response is largest for an…

Quantum Physics · Physics 2013-01-29 D. Witthaut

We consider the role of a propagation effect such as the stimulated Raman scattering on the polarization of radio pulses. When an intense electromagnetic wave with frequency close to the plasma frequency interacts with the plasma in the…

Astrophysics · Physics 2009-10-31 R. T. Gangadhara , H. Lesch , V. Krishan

Surface Enhanced Raman Spectroscopy (SERS) is a well-established technique for enhancing Raman signals. Recently photonic integrated circuits have been used, as an alternative to microscopy based excitation and collection, to probe SERS…

In this Letter, we introduce a new inline model for stimulated Raman scattering (SRS), which runs on our radiation hydrodynamics code TROLL. The modeling follows from a simplified version of a rigorous theory for SRS, which we describe, and…

Plasma Physics · Physics 2023-06-27 D. Bénisti , O. Morice , C. Rouseaux , A. Debayle , P. E. Masson-Laborde , P. Loiseau

In this paper, we derive coupled envelope equations modeling the growth of stimulated Raman scattering (SRS) in a multi-dimensional geometry, and accounting for nonlinear kinetic effects. In particular, our envelope equations allow for the…

Plasma Physics · Physics 2015-06-03 D. Benisti , O. Morice , L. Gremillet , A. Friou , E. Lefebvre

Raman scattering is an excellent method for simultaneously determining the dynamics of lattice, spin, and charge degrees of freedom. Furthermore, polarization selection rules in Raman scattering enable momentum-resolved quasiparticle…

Strongly Correlated Electrons · Physics 2024-09-04 Reshma Kumawat , Shubham Farswan , Simranjeet Kaur , Smriti Bhatia , Kaushik Sen

The bosonisation technique is used to calculate the resonant Raman spectrum of a quantum wire with two electronic sub-bands occupied. Close to resonance, the cross section at frequencies in the region of the inter sub-band transitions shows…

Strongly Correlated Electrons · Physics 2009-11-07 E. Mariani , M. Sassetti , B. Kramer

We present a method for deriving limits on Raman scattering in structured media and exploit it to constrain the maximum Raman signal resulting from a planewave incident on either a single Raman molecule in the vicinity of a structured…

Optical fibres are essential for many types of highly-multiplexed and precision spectroscopy. The success of the new generation of multifibre instruments under construction to investigate fundamental problems in cosmology, such as the…

Instrumentation and Methods for Astrophysics · Physics 2015-06-05 Jeremy Allington-Smith , Graham Murray , Ulrike Lemke

Charge-density waves (CDWs) are ordered quantum states of conduction electrons accompanied by periodic lattice distortions. Raman scattering (RS) spectroscopy is therefore well suited for probing CDW-induced structural modulations. We…

We propose a novel femtosecond stimulated Raman spectroscopy (FSRS) technique that combines entangled photons with interference detection to select matter pathways and enhance the resolution. Following photo excitation by an actinic pump,…

Quantum Physics · Physics 2014-07-15 Konstantin E. Dorfman , Frank Schlawin , Shaul Mukamel

In this letter, we report a three-dimensional (3D) quantum mechanical simulation to investigate the effects of surface roughness scattering (SRS) on the device characteristics of Si nanowire transistors (SNWTs). We treat the microscopic…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Jing Wang , Eric Polizzi , Avik Ghosh , Supriyo Datta , Mark Lundstrom

Raman scattering from a great number of phonon modes is described from a quantum-statistical point of view within the standing-wave model. The master equation for the completely quantum case, including laser pump depletion and stochastic…

Quantum Physics · Physics 2011-10-25 Adam Miranowicz , Stanislaw Kielich

Enhancement of optical response with high-index dielectric nanoparticles is attributed to the excitation of their Mie-type magnetic and electric resonances. Here we study Raman scattering from crystalline silicon nanoparticles and reveal…

The coupling evolutions of stimulated Raman scattering (SRS) and Raman rescattering (re-SRS) are studied under the parameter conditions of relevance to the gas-filled hohlraum experiments at the National Ignition Facility by a nonenveloped…

Plasma Physics · Physics 2019-04-26 Liang Hao , Wenyi Huo , Zhanjun Liu , Chunyang Zheng , Chuang Ren

Atomically thin MoS$_{2}$ crystals have been recognized as a quasi-2D semiconductor with remarkable physics properties. This letter reports our Raman scattering measurements on multilayer and monolayer MoS$_{2}$, especially in the…

Mesoscale and Nanoscale Physics · Physics 2015-06-11 Hualing Zeng , Bairen Zhu , Kai Liu , Jiahe Fan , Xiaodong Cui , Q. M. Zhang

The mechanism of formation of the polarimetric signal observed in the spin noise spectroscopy (SNS) is analyzed from the viewpoint of the light scattering theory. A rigorous calculation of the polarimetric signal (Faraday rotation or…

Optics · Physics 2021-02-04 G. G. Kozlov , A. A. Fomin , M. Yu. Petrov , I. I. Ryzhov , V. S. Zapasskii

We theoretically analyze and experimentally demonstrate the possibility of amplifying optical signals in an unrepeatered mode-division multiplexed tranmsmission system, through inter-modal stimulated Raman scattering process between signal…

The dichroism and birefringence effects in stumulated Raman scattering (SRS) in polyatomic molecules were studied theoretically. General expressions have been derived describing the change of the intensity and polarization of the probe…

Chemical Physics · Physics 2023-11-07 Bogdan V. Semak , Yaroslav M. Beltukov , Oleg S. Vasyutinskii