Concept

Numerical aperture

Related publications (124)

Nanoscale dispensing of liquids through cantilevered probes

Nico de Rooij, Terunobu Akiyama, Sylvia Jeney, André Meister

Nanoscale dispensing is a novel technique to deposit material and create structures at dimensions of 100 nm and below. It has great flexibility in feature shape and choice of deposited material. Due to its potential low cost and lack of time consuming step ...

2003

High-Al-content crack-free AlGaN/GaN Bragg mirrors grown by molecular-beam epitaxy

Nicolas Grandjean

We report on the growth by molecular-beam epitaxy on 2 in. sapphire substrates of crack-free AlxGa1-xN/GaN distributed Bragg reflectors (DBRs) with high-Al composition (x=0.5). This is achieved by introducing a thick AlN interlayer and strain mediating Aly ...

2003

Local amplitude and phase retrieval method for digital holography applied to microscopy

Michaël Unser, Christian Depeursinge, Etienne Cuche, Michael Stefan Daniel Liebling, Thierry Blu, Pierre Marquet

We present a numerical two-step reconstruction procedure for digital off-axis Fresnel holograms. First, we retrieve the amplitude and phase of the object wave in the CCD plane. For each point we solve a weighted linear set of equations in the least-squares ...

SPIE2003

Local Amplitude and Phase Retrieval Method for Digital Holography Applied to Microscopy

Michaël Unser, Christian Depeursinge, Etienne Cuche, Thierry Blu, Pierre Marquet

SPIE2003

Influence of metal roughness on the near-field generated by an aperture/apertureless probe

Olivier Martin

We study the influence of metal roughness on the near-field distribution generated by an aperture or an apertureless (scattering) probe. Different experimental parameters are investigated: roughness magnitude, aperture form, distribution of the roughness. ...

2002

Shadow-mask evaporation through monolayer-modified nanostencils

Jürgen Brugger

Gradual clogging of the apertures of nanostencils used as miniature shadow masks in metal evaporations can be reduced by coating the stencil with self-assembled monolayers (SAM). This is quantified by the dimensions (height and volume) of gold features obt ...

2002

Theoretical analysis of two-step holographic recording with high-intensity pulses

Demetri Psaltis

We develop a full numerical as well as an approximate analytic solution for two-step holographic recording with high intensity pulses in LiNbO3:Fe crystals. We find the unknown material parameters by fitting the numerical solution to the experimental resul ...

2001

New photoplastic fabrication techniques and devices based on high aspect ratio photoresist

Grégoire Genolet

This thesis deals with the development of microfabrication technologies based on photoplastic structuring by lithographic and molding techniques. These technologies, combined with an original releasing method, allow for the simple fabrication of pseudo thr ...

EPFL2001

Aperture apodization using cubic spline interpolation: application in digital holographic microscopy

Christian Depeursinge, Etienne Cuche, Pierre Marquet

A method is proposed for designing apodized apertures with a transmission profile which follows a curve defined using a cubic spline interpolation. The method is applied in digital holographic microscopy to perform digitally the apodization of the aperture ...

2000

OLCR characterization of long period grating induced cladding modes

René Salathé, Hans Georg Limberger

The group index of well-defined cladding modes has been characterized for the first time to our knowledge by optical low-coherence reflectometry (OLCR) with a precision

IEEE1999

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