| 1. |
- Torres Company, Victor, 1981, et al.
(författare)
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Shaping the Ultrafast Temporal Correlations of Thermal-Like Photons
- 2012
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 109:24, s. 243905-
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Tidskriftsartikel (refereegranskat)abstract
- We show that the temporal correlations between two light beams arising from a broadband thermal-like source can be controlled in the femtosecond regime. Specifically, by introducing spectral phase-only masks in the path of one of the beams, we show that the timing and strength of the photon correlations can be programmed on demand. This example demonstrates that the interbeam second-order coherence function propagates as a phase-sensitive ultrafast wave packet in the path towards the detectors, and is thus, susceptible to be modified by acting on just one of the beams. For quite some time, it has been thought that this could only happen with sources showing time-energy entanglement. Our work shows that such a property is due to the existence of a certain type of correlation, but not necessarily the entanglement.
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| 2. |
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| 3. |
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| 4. |
- Dong, Lin, et al.
(författare)
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Influence of nanoparticles concentration on fluorescence quenching in gold/rhodamine 6G nanoassemblies
- 2009
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Ingår i: 2009 Asia Communications and Photonics Conference and Exhibition, ACP 2009. - : Optical Society of America. - 9781557528773 ; , s. 5377045-
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Konferensbidrag (refereegranskat)abstract
- Fluorescence enhancement of dye solution doped with gold nanoparticles is a well-known effect. However, depending on size and concentration, nanoparticles can also deteriorate dye lasing properties due to increased quenching of the excited molecules. Here we report experimental results on such dependence of fluorescence degradation on the nanoparticle concentration.
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| 5. |
- Dong, Lin, et al.
(författare)
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Measurement of radiative lifetime in CdSe/CdS core/shell structured quantum dots
- 2009
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Ingår i: 2009 Asia Communications and Photonics Conference and Exhibition, ACP 2009. - Washington, D.C. : OSA. - 9781557528773 ; , s. 5377385-
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Konferensbidrag (refereegranskat)abstract
- Radiative lifetime of chemically synthesized colloidal CdSe/CdS core/shell quantum dots is measured. Influence of the core size on the electron-hole pair separation is analyzed. A long radiative lifetime and the existence of electron-hole pair separation suggest high potential of these dots as gain material to achieve lasing under continuous-wave excitation.
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| 6. |
- Friberg, Ari T., et al.
(författare)
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Electromagnetic coherence and pancharatnam-berry phase in young's interference experiment
- 2007
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Ingår i: Conference on Coherence and Quantum Optics, CQO 2007. - : Optical Society of America. - 1557528497 - 9781557528490
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Konferensbidrag (refereegranskat)abstract
- The spectral interference law is used to derive the electromagnetic degree of coherence and the Pancharatnam-Berry phase in Young's two-pinhole setup. The phase has a straightforward connection to the Stokes parameters at the openings.
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| 7. |
- Hakkarainen, T., et al.
(författare)
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Imaging of interacting nano-objects with superlenses
- 2012
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Ingår i: Biomedical Optics, BIOMED 2012. - Washington, D.C. : Optical Society of America. - 9781557529428
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Konferensbidrag (refereegranskat)abstract
- Employing rigorous electromagnetic theory we show that near-field imaging of point-like objects with subwavelength resolution is achieveable with nanoslab superlenses. For a metallic lens the resolution is »λ/5, whereas for a metamaterial lens λ/10 is obtained. We also illustrate how the near-field interactions among the objects and the lens affect the imaging.
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| 8. |
- Iyer, Srinivasan, et al.
(författare)
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Double nanoholes in a metal film as refractive index sensors
- 2010
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Ingår i: Frontiers in Optics, FiO 2010. - Washington, D.C. : OSA.
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Konferensbidrag (refereegranskat)abstract
- The transmission of light through a thin Au film with subwavelength double nanoholes is modeled using vectorial three-dimensional finite element method. The performance of such perforated films as a potential refractive index sensor is discussed.
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| 9. |
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| 10. |
- Iyer, Srinivasan, et al.
(författare)
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Physical reason behind far-field transmission resonances from U-shaped metallic structures
- 2010
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Ingår i: 2010 Asia Communications and Photonics Conference and Exhibition, ACP 2010. - 9781424471119 ; , s. 326-327
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Konferensbidrag (refereegranskat)abstract
- The far-field transmission spectrum of crescent-like metallic nanostructures on a glass substrate at normal incidence is studied numerically. The interpretation of transmission resonances arising from a periodic subwavelength U-shaped metal nanostructure in terms of plasmonic eigen modes is revisited.
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