Related Experiment Video
Updated: May 3, 2026
14:58
Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
Published on: June 3, 2015
18.0K
Polariton-generated intensity squeezing in semiconductor micropillars.
1Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure and CNRS, UPMC Case 74, 4 place Jussieu, 75252 Paris Cedex 05, France.
Nature Communications
|February 13, 2014
Summary
Researchers developed a new semiconductor source for squeezed light, essential for quantum information. Pillar microcavities achieved significant squeezing, outperforming planar designs for robust quantum technologies.
Area of Science:
- Quantum optics
- Semiconductor physics
- Quantum information science
Background:
- Squeezed and entangled light fields are fundamental for quantum information protocols.
- Semiconductor microcavities offer potential for integrated quantum devices.
Purpose of the Study:
- To demonstrate a novel source of continuous variable squeezed light using pillar-shaped semiconductor microcavities.
- To investigate the generation of squeezing in the strong coupling regime within these devices.
Main Methods:
- Utilizing degenerate polariton four-wave mixing by exciting pillar microcavities at normal incidence.
- Analyzing the noise characteristics of the emitted light to quantify squeezing.
- Comparing performance with planar microcavity designs.
Main Results:
- Observed bistable behavior in the pillar microcavities.
- Successfully generated squeezed light near the bistability turning point.
- Achieved a measured intensity squeezing of 20.3%, with an inferred value of 35.8% after corrections.
- Demonstrated enhanced squeezing compared to planar microcavities due to confined geometry and discrete energy levels.
Conclusions:
- Pillar-shaped semiconductor microcavities represent a promising platform for generating continuous variable squeezed light.
- The confined geometry offers advantages in noise protection, leading to improved squeezing performance.
- This work advances the development of on-chip quantum devices for quantum information processing.
Related Concept Videos
01:27Biasing of Metal-Semiconductor Junctions
907
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
907
01:16Biasing of P-N Junction
2.7K
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
2.7K
01:22MOSFET: Enhancement Mode
1.1K
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
1.1K