Concept

Laser pumping

Related publications (423)

Analysis of structurally sensitive loss in GaN-based VCSEL cavities and its effect on modal discrimination

Nicolas Grandjean, Gatien Cosendey, Ehsan Hashemi

Lateral loss causes optical energy to leave the laser cavity in the transverse, lateral, direction, and is sometimes neglected to simplify the numerical simulations. However, in contrast to outcoupling and absorption losses, we show that the lateral loss c ...

Optical Soc Amer2014

Low-temperature solution-processed wavelength-tunable perovskites for lasing

Nripan Mathews

Low-temperature solution-processed materials that show optical gain and can be embedded into a wide range of cavity resonators are attractive for the realization of on-chip coherent light sources. Organic semiconductors and colloidal quantum dots are consi ...

Nature Publishing Group2014

Upconversion Particle as a Local Luminescent Brownian Probe: A Photonic Force Microscopy Study

László Forró, Andrzej Sienkiewicz, Flavio Maurizio Mor, Sylvia Jeney

Near-infrared (NIR) light sensitive lanthanide-doped NaYF4 upconversion particles (UCPs) are gaining increasing attention as local probes in biomedical applications. Here, we implemented a photonic force microscope (PFM) to manipulate and study the optical ...

Amer Chemical Soc2014

Temporal solitons in optical microresonators

Tobias Kippenberg, Victor Brasch, Tobias Herr, John David Jost

Temporal dissipative solitons in a continuous-wave laser-driven nonlinear optical microresonator were observed. The solitons were generated spontaneously when the laser frequency was tuned through the effective zero detuning point of a high-Q resonance, wh ...

Nature Publishing Group2014

Interaction between meta-materials and shallow donors in bulk GaN at THz frequency

Nicolas Grandjean, Etienne François Olivier Giraud, Jérôme Faist

We report the coupling and interaction between shallow donors and microcavities in bulk GaN at THz frequencies. At 4K, the shallow donors lead to an absorption at 23.5 meV (5.7 THz) under optical pumping above the bandgap of GaN. The microcavities are base ...

Optical Soc Amer2014

InGaN alloys and heterostructures

Marlene Glauser

The III-nitride semiconductor material system - (InAlGa)N - is of highest interest for optoelectronic applications due to its direct bandgap, tunable from the ultraviolet to the infrared spectral range. The most well-known are white light-emitting diodes, ...

EPFL2014

A new strategy for improving fluorescent immunoassays using photonic crystals

Hans Peter Herzig, Elsie Barakat

The most widely used substrates for fluorescent immunoassay are based on transparent materials such as glass or plastic with almost no optical functionality. Very recently, optical nanostructures made of metal on dielectrics have been proposed to perform p ...

2014

Intense sub-two-cycle infrared pulse generation via phase-mismatched cascaded nonlinear interaction in DAST crystal

Christoph Peter Hauri

Octave-spanning, 12.5 fs, (1.9 cycle) pulses with 115 mu J energy in the short-wavelength mid-infrared spectral range (1-2.5 mu m) have been generated via phase-mismatched cascaded nonlinear frequency conversion using organic DAST (4-N, N-dimethylamino-4 ' ...

2014

Up-scalable method to amplify the diffraction efficiency of simple gratings

Olivier Martin, Martin Stalder

An innovative class of coupling gratings for efficiently redirecting light beams is described. They are based on symmetric binary gratings equipped with an asymmetric high refractive index coating. This kind of structure exhibits a grating blaze effect and ...

Optical Society of America2014

Vertical cavity surface emitting laser cavity with low thermal impedance

Elyahou Kapon, Vladimir Iakovlev, Pascal Gallo

The present invention concerns new designs of VCLs with high contrast gratings (HCG) combined with diamond layer as a bottom mirror. They can be realized either with a classical V-shaped pumping scenario, or through the introduction of the pumping beam fro ...

2013

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