Related Experiment Video
Updated: Apr 16, 2026
12:21
Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
Published on: April 4, 2016
11.8K
Investigation of anti-Stokes Raman processes at phonon-polariton resonance: from Raman oscillation, frequency
Optics Letters
|February 28, 2015
Summary
Researchers achieved Raman oscillation, frequency upconversion, and amplification in nonlinear media using phonon-polariton resonance. This method efficiently generates and amplifies anti-Stokes fields, with applications in laser cooling and enhanced scattering.
Area of Science:
- Nonlinear Optics
- Solid-State Physics
- Quantum Optics
Background:
- Second-order nonlinear media enable optical phenomena through induced polarization.
- Phonon-polaritons are hybrid excitations of light and lattice vibrations.
- Raman scattering typically involves inelastic light scattering by phonons.
Purpose of the Study:
- To investigate Raman oscillation, frequency upconversion, and amplification in a second-order nonlinear medium.
- To explore the role of phonon-polariton resonance in these processes.
- To compare copropagating and counterpropagating configurations for optimal performance.
Main Methods:
- Generating a second-order nonlinear polarization by beating two optical fields.
- Utilizing the induced electric field at the beat frequency to mix with input optical fields.
- Analyzing the generation and amplification of anti-Stokes optical fields.
Main Results:
- Raman oscillation achieved efficiently in the copropagating configuration.
- Efficient frequency upconversion and large amplifications observed in the counterpropagating configuration.
- Demonstrated potential for phonon removal, laser cooling, and enhanced coherent anti-Stokes Raman scattering.
Conclusions:
- Phonon-polariton resonance in second-order nonlinear media provides a versatile platform for optical frequency manipulation.
- The counterpropagating configuration is advantageous for amplifying weak signals and achieving significant upconversion.
- These Raman processes offer novel pathways for fundamental research and practical applications in optics and condensed matter physics.
Related Concept Videos
01:20Raman Spectroscopy: Overview
2.7K
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
2.7K
01:12Double Resonance Techniques: Overview
872
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
872
01:26Raman Spectroscopy Instrumentation: Overview
1.9K
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
1.9K
01:20Stokes' Law
3.5K
Viscous forces, like friction, are intermolecular forces that resist the relative motion of molecules over each other. When a solid body moves through a liquid, viscous forces drag it in the opposite direction. The force's magnitude depends on the solid's shape and size, as well as its speed and the liquid's coefficient of viscosity, density and temperature.
The expression for the force on a solid spherical object in a fluid is called Stokes' law. Stokes' law is valid only...
The expression for the force on a solid spherical object in a fluid is called Stokes' law. Stokes' law is valid only...
3.5K
01:05Atomic Nuclei: Magnetic Resonance
1.4K
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
1.4K
01:13¹H NMR: Complex Splitting
2.2K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
2.2K