Concept

Gradient-index optics

Related publications (103)

Graph Chatbot

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Real-time Amyloid Aggregation Monitoring with a Photonic Crystal-based Approach

Hans Peter Herzig, Hilal Lashuel, Peter Van der Wal, Vincent Paeder, Lubos Hvozdara, Joab Di Francesco, Valeria Musi, Sara Santi

We propose the application of a new label-free optical technique based on photonic nanostructures to real-time monitor the amyloid-beta 1-42 (Ab(1-42)) fibrillization, including the early stages of the aggregation process, which are related to the onset of ...

Wiley-Blackwell2013

CHALLENGES IN MICRO- AND NANO-OPTICS (plenary talk)

Hans Peter Herzig

Micro-optics describes a family of elements and systems fabricated by modern micromachining. Optical structures with nearly arbitrary shapes and dimensions down to the nanometer can be realized offering a large degree of freedom for the design. The progres ...

2012

Role of data processing in measuring temperature gradients with DOE Schardin's schlieren #2

Pramod Rastogi, Sai Siva Gorthi

Flows having a variable fluid density can be visualized with optical methods. Recently, a background distortion technique, which can be considered a type of Schardin's schlieren #2, was proposed to study the refractive index variation in fluid and hence to ...

Elsevier2012

A tilted grating interferometer for full vector field differential x-ray phase contrast tomography

Peter Modregger, Simon Rutishauser, Christian David, Marco Stampanoni

We report on a setup for differential x-ray phase-contrast imaging and tomography, that measures the full 2D phase-gradient information. The setup uses a simple one-dimensional x-ray grating interferometer, in which the grating structures of the interferom ...

Optical Society of America2012

30nm Mettalic Slot Array for Sensing: Theoretical and Experimental Study

Hans Peter Herzig, Qing Tan, Armando Cosentino

The simulation, fabrication and characterization of a metallic slot grating on a silicon waveguide (30 nm slot width for a period of 500 nm) are presented [1]. This device is attempting to be a sensor for refractive index variation measurements with theore ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2011

, ,

We present the simulation, fabrication, and characterization of a metallic slot grating on a silicon waveguide (30nm slot width for a period of 500nm). According to the simulation, the experimental measured spectrum of the structure exhibits a dip in the n ...

2011

Inkjet printing of SU-8 for high-aspect ratio spherical polymeric microstructures

Jürgen Brugger, Victor Javier Cadarso Busto, Rosario Maurizio Gullo, Loïc Jacot-Descombes

SU-8 exhibits interesting mechanical and optical properties for various MEMS applications, such as the development of micro lens and ball-like lens arrays. One of the most common method to fabricate such structures, is thermal reflow. However, a promising ...

2011

Photosensitivity and stress changes of Ge-free Bi-Al doped silica optical fibers under ArF excimer laser irradiation

Hans Georg Limberger, Christian Ban

The photosensitivity of germanium free Bi-Al-doped silica fibers with different bismuth concentrations was investigated using ArF excimer laser radiation at 193 nm and fiber grating formation. For the fiber with the highest bismuth concentration maximum re ...

Optical Society of America2011

, , , , , ,

We report coupled VCSEL arrays, emitting at 1.3μm wavelength, in which both the optical gain/loss and refractive index distributions were defined on different vertical layers. The arrays were electrically pumped through a patterned tunnel junction, whereas ...

Optical Society of America2011

, ,

Ink-jet printing of optical ink over SU-8 pillars is here proposed as a technology for obtaining microlenses with shape control. To demonstrate the flexibility of this method, microlenses with five different contour shapes (ranging from circular and ellipt ...

Optical Society of America2011