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Disorder in photonic-crystal slab waveguides can cause localization of light [1, 2]. Sapienza et al. observed that the interaction of localized light with embedded quantum dots is so strong that it yields a considerable Purcell enhancement of the emission rate [3]. This coupling between emitters and these “random cavities” warrants a more detailed investigation.
We demonstrate high resolution (1 cm−1) spectroscopy around 3000 cm−1 by combining a broadband shaped pulse (pump and probe) with a narrow Stokes pulse. We introduce new phase shaping strategies for the removal of the non-resonant background.
We demonstrate high resolution (1 cm-1) spectroscopy around 3000 cm-1 by combining a broadband shaped pulse (pump and probe) with a narrow Stokes pulse. We introduce new phase shaping strategies for the removal of the non-resonant background.
One of the exciting features of photonic crystals is that light may travel at very low group velocities at specific optical frequencies. In photonic crystal waveguides, such low group velocities are also possible. We have studied the propagation of femtosecond pulses in these waveguides, with a phase-sensitive and time-resolved near-field microscope. With this microscope, we visualized the pulses...
A novel near-field optical microscope is developed to visualize surface plasmon polaritons (SPP) in space and time. We present the first phase-sensitive and time-resolved SPP measurements and determination of the SPP group velocity.
We have studied the dispersion of femtosecond pulses in a photonic crystal waveguide. We found that slow propagating pulses were asymmetrically broadened, due to higher order dispersion. With decreasing group velocity, the asymmetry increased.
In this paper, the investigation of light propagating inside such a structure is usually limited by both the diffraction limit and the absence of radiating light. We have solved this by investigating a photonic crystal waveguide with a phase-sensitive time-resolved near-field scanning microscope. Photonic crystals are promising structures for controlling light, because the light has to obey Bloch's...
We directly visualized pulses as they propagate through a photonic crystal waveguide with both temporal and spatial resolution. The amplitude of the local field reveals multi-mode behavior and the existence of long-lived nonlocalized modes
Summary form only given. Nowadays, a measurement of the intensity of the optical field in integrated optical waveguide devices with a photon scanning tunneling microscope (PSTM) is reasonably routine. However, if one could visualize the evolution of the phase of the light field in real-space, it would yield new and detailed information concerning the properties of wavelength multiplexers, mode converters,...
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