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Origin of Antibunching in Resonance Fluorescence
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- Hanschke, Lukas (författare)
- Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany.;Tech Univ Munich, Dept Elect & Comp Engn, D-85748 Garching, Germany.;Munich Ctr Quantum Sci & Technol MCQST, D-80799 Munich, Germany.
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- Schweickert, Lucas (författare)
- KTH,Tillämpad fysik
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- Carreno, Juan Camilo Lopez (författare)
- Univ Wolverhampton, Fac Sci & Engn, Wulfruna St, Wolverhampton WV1 1LY, England.
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- Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany;Tech Univ Munich, Dept Elect & Comp Engn, D-85748 Garching, Germany.;Munich Ctr Quantum Sci & Technol MCQST, D-80799 Munich, Germany. Tillämpad fysik (creator_code:org_t)
- American Physical Society, 2020
- 2020
- Engelska.
- Ingår i: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 125:17
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Resonance fluorescence has played a major role in quantum optics with predictions and later experimental confirmation of nonclassical features of its emitted light such as antibunching or squeezing. In the Rayleigh regime where most of the light originates from the scattering of photons with subnatural linewidth, antibunching would appear to coexist with sharp spectral lines. Here, we demonstrate that this simultaneous observation of subnatural linewidth and antibunching is not possible with simple resonant excitation. Using an epitaxial quantum dot for the two-level system, we independently confirm the single-photon character and subnatural linewidth by demonstrating antibunching in a Hanbury Brown and Twiss type setup and using high-resolution spectroscopy, respectively. However, when filtering the coherently scattered photons with filter bandwidths on the order of the homogeneous linewidth of the excited state of the two-level system, the antibunching dip vanishes in the correlation measurement. Our observation is explained by antibunching originating from photon-interferences between the coherent scattering and a weak incoherent signal in a skewed squeezed state. This prefigures schemes to achieve simultaneous subnatural linewidth and antibunched emission.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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