Publication

Si-interdiffusion in heavily doped AlN-GaN-based quantum well intersubband photodetectors

Publications associées (11)

Unimolecular fragmentation and radiative cooling of isolated PAH ions: A quantitative study

Time-resolved spontaneous and laser-induced unimolecular fragmentation of perylene cations (C20H12+) has been measured on timescales up to 2 s in a cryogenic electrostatic ion beam storage ring. We elaborate a quantitative model, which includes fragmentati ...

AMER INST PHYSICS2020

Ultrafast Photoelectron and Optical Spectroscopies of Photoinduced Processes in Molecular Systems in Solution

Luca Longetti

Investigating molecular excitations with femtosecond time resolution is of pivotal importance to understand the out-of-equilibrium processes taking place in molecular systems upon light absorption. The photochemistry of solvated species is heavily determin ...

EPFL2020

Cryogenic infrared spectroscopy as a probe of structure and dynamics of biomolecules

Valeriu Scutelnic

The pivotal theory of molecular biology states that the structure of biomolecules is directly related to their function in living systems. In this way, the structural investigation of biological molecules allows understanding and intervening in the fundame ...

EPFL2018

Observation of the 1S-2P Lyman-alpha transition in antihydrogen

Shirit Cohen

In 1906, Theodore Lyman discovered his eponymous series of transitions in the extreme-ultraviolet region of the atomic hydrogen spectrum(1,2). The patterns in the hydrogen spectrum helped to establish the emerging theory of quantum mechanics, which we now ...

Nature Publishing Group2018

Band-gap tuning of lead halide perovskite using a single step spin-coating deposition process

Mohammad Khaja Nazeeruddin

In this paper, we present a study of the structural and optical properties of organic-inorganic halide-based perovskite semiconductors with band gaps varying from NIR to visible at room temperature. Thin films of nanocrystalline CH3NH3PbI3 with different c ...

Elsevier Science Bv2016

The nature of vertical excited states of dyes containing metals for DSSC applications: insights from TD-DFT and density based indexes

Eric Albert Georges Bremond

Transition metal complexes, typically Ru-based complexes, are the most efficient dyes used in dye-sensitized solar cells. The absorption spectra of these molecules generally involve numerous electronic transitions, which are not equivalent for the conversi ...

Royal Soc Chemistry2014

Optical Gas-Phase Frequency References Based on Photonic Crystal Technology : Impact of Slow Light on Molecular Absorption

Isabelle Dicaire

Optical frequency references are devices providing well-defined and stable optical frequency responses to incoming radiation for applications such as high-precision spectroscopy and optical fibre communications. To stabilise the emission frequency of laser ...

EPFL2012

Ultraviolet-visible absorption of small silver clusters in neon: Ag-n (n=1-9)

Wolfgang Harbich, Sylvain Lecoultre, Alexandre Rydlo

We present optical absorption and fluorescence spectra in the UV-visible range of size selected neutral Ag-n clusters (n = 1-9) in solid neon. Rich and detailed optical spectra are found with linewidths as small as 50 meV. These spectra are compared to tim ...

American Institute of Physics2011

Holographic Second Harmonic Generation Microscopy

Etienne Shaffer

This dissertation is dedicated to the application of digital holography methods to second harmonic generation microscopy, and to the development of the resulting imaging technique: holographic second harmonic generation microscopy. Second harmonic generati ...

EPFL2011

Bias-dependent absorption coefficient of the absorber section in GaN-based multisection laser diodes

Nicolas Grandjean, Jean-François Carlin, Antonino Francesco Castiglia, Luca Alex Milo Sulmoni

We measure the modal absorption coefficient of the InGaN quantum wells (QWs) in the absorber section of (Al,In)GaN multisection laser diodes as a function of bias voltage and photon energy using optical gain-spectroscopy. In the examined laser diodes, the ...

AIP American Institute of Physics2010