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We demonstrate dynamic modulation of a hybrid plasmonic-photonic crystal nanocavity through using monochromatic coherent acoustic phonons formed by ultrahigh-frequency surface acoustic waves to achieve strong optomechanical coupling. As a result, optical resonance wavelength shift and a large modulation bandwidth are shown at telecommunication wavelength for the hybrid nanocavity.
We investigate the enhancement of acousto-optic (AO) coupling using a Ag/GaAs heterogeneous phoxonic crystal nanobeam cavity. Because of the Ag layer, the cavity structure hybridizes surface plasmons and photons, squeezing the optical energy into a smaller region near the GaAs/Ag interface. The photonic cavity modes highly match the phononic cavity modes in space in the cavity. Because of the mode...
A phase-matched output coupler is introduced and used to improve broadband modelocking of a Ti:sapphire laser with a tunable enhancement of >15dB at long wavelengths while maintaining a good beam profile.
We demonstrate a broadband visible-wavelength astro-comb enabled by two key technologies: dispersion-managed, fiber-optic Cherenkov radiation for green-to-red source-comb generation and complementary chirped-mirror pairs for constructing broadband Fabry-Perot filtering cavities.
In few-cycle Kerr-lens mode-locked Ti:sapphire lasers, the laser crystal is exposed to extremely high intensities which can result in crystal damage and performance degradation with time. Modeling of the intracavity pulse dynamics can deepen the understanding of the different phenomena contributing to possible damage and of how to best optimize the laser performance. We present a one-dimensional laser...
The spatiotemporal pulse dynamics of few-cycle Ti:sapphire lasers is studied. It is found that in the high-intensity regime, plasma formation in the crystal plays an important role in the mode-locking process and for the laser behavior.
Broadband laser mode-locking is demonstrated at greatly reduced modelocking strength with an output coupler that compensates for gain filtering. The concept is demonstrated with a >8 fs Ti:sapphire laser showing dramatically improved stability and beam quality.
Searches for extrasolar planets using the periodic Doppler shift of stellar spectral lines resulting from the motion of the host star around the barycentre of an extrasolar system have recently achieved a precision of 60 cm/s. To find a 1-Earth-mass planet in an Earth-like orbit, a precision of 5 cm/s is necessary. The sensitivity of astrophysical spectroscopy is presently limited by its wavelength...
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