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Hans Peter Herzig

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Publications associées (110)

Silicon based micro-optical collimating element for mid-infrared Quantum Cascade Lasers

Pierre-Yves Baroni, Hans Peter Herzig, Lubos Hvozdara, Antoine Muller, Joab Di Francesco

A realization of a high numeric aperture, aspheric, silicon based collimating element for the mid-infrared (4 – 14 microns) Quantum Cascade Lasers, suited for mass production using computer driven reactive ion etching is presented. ...

2012

Phase anomalies in Bessel-Gauss beams

Hans Peter Herzig, Myun Sik Kim, Toralf Scharf

Bessel-Gauss beams are known as non-diffracting beams. They can be obtained by focusing an annularly shaped collimated laser beam. Here, we report for the first time on the direct measurement of the phase evolution of such beams by relying on longitudinal- ...

Optical Society of America2012

High numerical aperture silicon collimating lens for mid-infrared quantum cascade lasers manufactured using wafer-level techniques

Pierre-Yves Baroni, Hans Peter Herzig, Lubos Hvozdara, Antoine Muller, Joab Di Francesco

We present an aspheric collimating lens for mid-infrared (4-14 µ) quantum cascade lasers. The lenses were etched into silicon by an inductively coupled plasma reactive ion etching system on wafer level. The high refractive index of silicon reduces the heig ...

2012

Planar multilayers as a versatile platform for nano-photonics

Tristan Sfez, Hans Peter Herzig, Olivier Martin, Andrea Lovera, Alessandro Angelini, Francesco Michelotti

2012

Axial phase measurements of light interacting with microstructures

Hans Peter Herzig, Myun Sik Kim, Toralf Scharf

We present an experimental method to study field structures of highly confined light after interaction with microstructures. A high-resolution interference microscope (HRIM) allows us to measure the three-dimensional (3D) amplitude and phase distributions ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2012

Generation of highly confined optical bottle beams by exploiting the photonic nanojet effect

Hans Peter Herzig, Myun Sik Kim, Toralf Scharf

We report on the generation of photonic nanojets, which resemble optical bottle beams. They are realized by manipulating the illumination of dielectric microspheres. As illumination we use the outer region of deliberately truncated Bessel-Gauss beam or a f ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2012

Refractive index sensor based on slot waveguide cavity

Hans Peter Herzig, Armando Cosentino, Qing Tan

The experimental study of a gold slot waveguide cavity is presented. The resonance of this cavity working in the telecom wavelength range is highly dependent on the refractive index of the medium located in or around the slots array, because of the high co ...

European Optical Soc2012

In-plane illuminated metallic annular aperture array for sensing application

Hans Peter Herzig, Armando Cosentino, Qing Tan

We propose here an application to sensing of annular aperture arrays (AAA). We theoretically investigate the optical properties of the reflective AAA device when illuminated in-plane. The cavity presents almost perfect absorption due to the waveguide mode ...

Optical Society of America2012

Observation of Axial Phase Evolution of Highly Confined Light Fields

Hans Peter Herzig, Myun Sik Kim, Toralf Scharf

Highly confined light fields demonstrate peculiar phase features, e.g., Gouy phase anomaly. Longitudinal-differential phase measurements by a high-resolution interference microscope are applied to investigate phase evolutions of confined light fields for p ...

2011

Gouy phase anomaly in photonic nanojets

Hans Peter Herzig, Myun Sik Kim, Toralf Scharf

We investigate in real space amplitude and phase distributions of light in photonic nanojets emerging from micrometer-sized dielectric spheres with a high-resolution interference microscope. Strong localization of light and a Gouy phase anomaly are witness ...

American Institute of Physics2011

Investigation of Protein Aggregation with a Bloch Surface Wave Sensor

Hans Peter Herzig, Vincent Paeder, Valeria Musi, Lubos Hvozdara, Sara Santi

We present a study of the dynamics of protein aggregation using a common path heterodyne Bloch surface wave label-free sensing scheme. We demonstrate the ability to detect, during thermal incubation, the first early dynamics events of protein aggregation a ...

2011

Demonstration of superprism effect in silicon pillar 2-D photonic crystal infiltrated with liquid crystals

Pierre-Yves Baroni, Hans Peter Herzig, Yu-Chi Chang, Vincent Paeder

Superprism-based deflection of an optical beam is observed in a photonic crystal composed of a triangular lattice of pillars infiltrated with a liquid crystal. The device is based on a Silicon-on-insulator substrate and operates in the telecommunications b ...

2011

Engineering photonic nanojets

Hans Peter Herzig, Myun Sik Kim, Toralf Scharf

Photonic Nanojets are highly localized wave fields emerging directly behind dielectric microspheres; if suitably illuminated. In this contribution we reveal how different illumination conditions can be used to engineer the photonic Nanojets by measuring th ...

Optical Society of America2011

CO2 isotope sensor using a broadband infrared source, a spectrally narrow 4.4 μm quantum cascade detector, and a Fourier spectrometer

Hans Peter Herzig, Lubos Hvozdara, Joab Di Francesco

We report a prototype CO2 gas sensor based on a simple blackbody infrared source and a spectrally narrow quantum cascade detector (QCD). The detector absorption spectrum is centered at 2260 cm−1 (4.4 μm) and has a full width at half maximum of 200 cm−1 (25 ...

2011

Theoretical and experimental study of a 30nm metallic slot array

Hans Peter Herzig, Armando Cosentino, Qing Tan

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

Photonic Nanojet engineering: Focal point shaping with scattering phenomena of dielectric microspheres

Hans Peter Herzig, Myun Sik Kim, Toralf Scharf

We experimentally engineer Nanojets produced by dielectric spheres by varying the illumination and observe the effect with a high-resolution interference microscope (HRIM). Converging and diverging spherical wavefronts and Bessel- Gauss beams are considere ...

SPIE2011

Understanding of photocurrent enhancement in real thin film solar cells: towards optimal onedimensional gratings

Christophe Ballif, Hans Peter Herzig, Karin Söderström, Vincent Paeder, Toralf Scharf, Ali Naqavi

Despite the progress in the engineering of structures to enhance photocurrent in thin film solar cells, there are few comprehensive studies which provide general and intuitive insight into the problem of light trapping. Also, lack of theoretical propositio ...

Optical Society of America2011

Measuring amplitude and phase of light emerging from microstructures with HRIM

Hans Peter Herzig, Myun Sik Kim, Toralf Scharf

Ultra high-resolution measurements of amplitude and phase fields emerging from fine period amplitude gratings are presented and discussed. In the axial direction periodically repeated features are found, whose origins are the Talbot effect within the Fresn ...

SPIE Digital Library2011

Detection of protein aggregation with a Bloch surface wave based sensor

Sylvain Herminjard, Hans Peter Herzig, Vincent Paeder, Valeria Musi, Lubos Hvozdara

We present the innovative application of a Bloch surface wave based sensor to the detection of protein aggregation. In Hen Egg White Lysozyme (HEWL) solutions, aggregates are discriminated from the monomeric forms in a label-free detection scheme. ...

Elsevier2011

Single Mode Mid-infrared Waveguide for Evanescent Sensor Scheme in Liquids

Hans Peter Herzig, Yu-Chi Chang, Vincent Paeder, Philip Wägli, Lubos Hvozdara

A Si/Ge based, single mode, mid-infrared optical waveguide, is used as an evanescent sensor in liquid matrix. The selectivity is achieved by the use of quantum cascade lasers (QCLs) tuned to the maximum absorption of a given analyte. The cocaine detection ...

2011

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