Related Experiment Video
Updated: Jan 1, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.9K
Resolving the temporal evolution of line broadening in single quantum emitters
Optics Express
|December 28, 2019
Summary
Photon correlation Fourier spectroscopy (PCFS) reveals how environmental factors broaden light emission in quantum dots. This technique offers high resolution for quantum communication applications.
Area of Science:
- Quantum physics
- Solid-state spectroscopy
Background:
- Solid-state quantum emitters suffer from environmental decoherence, leading to line broadening and reduced photon indistinguishability.
- This decoherence hinders applications in quantum communication and quantum information processing.
Purpose of the Study:
- To investigate the temporal evolution of spectral broadening in GaAs and In(Ga)As quantum dots using photon correlation Fourier spectroscopy (PCFS).
- To compare the performance of PCFS with established spectroscopy techniques for studying quantum emitter dynamics.
Main Methods:
- Utilizing photon correlation Fourier spectroscopy (PCFS) with short laser pulses to drive quantum emitters.
- Probing time scales from nanoseconds to milliseconds with spectral resolution as fine as ~2µeV.
- Analyzing the impact of white light irradiation on blinking and charge noise.
Main Results:
- Observed distinct temporal evolutions of spectral broadening across different optical transition lines.
- Attributed differences to variations in homogeneous linewidth and sensitivity to charge noise.
- Demonstrated that PCFS outperforms traditional methods like Michelson interferometry in terms of robustness, temporal resolution, and bandwidth.
Conclusions:
- PCFS is a powerful and robust technique for characterizing decoherence in quantum emitters.
- The findings provide insights into optimizing quantum dot properties for quantum information processing.
- PCFS can be practically implemented to estimate photon indistinguishability for quantum applications.
More Related Videos
Related Concept Videos
02:39Emission Spectra
75.3K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
75.3K
02:32The de Broglie Wavelength
32.7K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
32.7K
01:16UV–Vis Spectroscopy: Molecular Electronic Transitions
2.6K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
2.6K
01:12Fermi Level Dynamics
597
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
597
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.4K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.4K
01:12Interaction of EM Radiation with Matter: Spectroscopy
3.0K
Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...
3.0K