Laser focus with zero curvature
The objective of this project is the generation and characterization of a laser beam with “zero curvature” at its focus. “Zero curvature” means that the series expansion of the intensity at the focus has no quadratic term.
Optical antennas driven by quantum tunneling
We have several semester and master projects available with regards to the study of novel antenna designs, the optimization of device efficiencies and the exploration of new frequency domains.
Light-matter interactions in VdW heterostructure coupled to optical antennas
The goal of this project is to study strongly enhanced light-matter interactions in Van der Waals heterostructures [2] – stacks of different two-dimensional materials – that are coupled to nanocube antennas.
Optoelectronics with two-dimensional atomic crystals
For device applications, it is desirable to create functional hetero-structures by stacking two-dimensional atomic crystals on top of each other, forming so-called Van der Waals (VdW) heterostructures. We study the fabrication and properties of such optoelectronic devices based on 2D materials.
Optical trapping and cooling at telecom wavelengths
The goal of this master project is to set up an optical trap for a dielectric nanoparticle at telecom wavelengths and evaluate its performance for feedback cooling in comparison to existing experiments at 1064 nm.
Low-cost and handheld interferometric imager with subnanometer-resolution for point-of-care diagnosis
This project is about developing and verifying a prototype of an imaging device (based on CMOS) for point-of-care (PoC) applications (such as early state detection of blood infections (SEPSIS) and other diseases).
Dielectric metasurfaces
We aim at studying the absorption/transmission characteristics of dielectric metasurfaces that outperform their plasmonic counterparts in terms of spectral resonance confinement, extinction and overall transmission. The goal is to develop a theoretical framework for simulating dielectric metasurface
Radiation Pressure Sensor
The objective of this project is to develop a sensor for measuring the radiation pressure of light. A high-reflectivity dielectric mirror will be be mounted on a nanoscale cantilever with very low stiffness. An incident laser beam will be reflected and measured by a weak probe laser.
Electronic processing of quantum random numbers from a photonic chip
The goal of this project is to develop a complete interface, control and processing electronic system based on state-of-the-art FPGA technologies to integrate the optics with current IT systems.
Optical sensing with a resonant tunneling device
In this project, an optical multilayer structure will be analyzed, fabricated and characterized. The objective is to fabricate the device and measure the reflectance spectrum for different angles.
Automated identification of two-dimensional crystals based on optical contrast difference
The goal of this project is to develop an automated setup that is able to identify flakes of different thicknesses on Si/SiO2 substrates by analyzing the difference in optical contrast between the crystals and the substrate.
Optimal State Estimation of a Levitated Nanoparticle
In this project, a Kalman filter will be implemented to estimate the time-varying state of a nanoparticle held in the focus of a laser beam. The state of the particle will then be used in a feedback loop to act back on the particle and to provide ultimate control over the nanoparticle's dynamics.
Master Thesis about Nonlinear Photonics of Nanostructures
We propose to work on the realization and the advanced optical characterization of a new class of nonlinear optical materials based on the assembly of perovskite nano-particles (nano-oxides) in disordered, correlated and hierarchical structures.
PhD Student in Nonlinear Photonics of Metal-Oxides Metastructures
The PhD student will investigate a new class of nonlinear optical materials and their applications as compact photonic devices. The interest targets the increasing demand for miniature optoelectronic devices that are efficient, robust and easy to fabricate for large scale applications.
Injection of Charged Nanoparticles into an Optical Trap
Nanoparticles can be trapped at the focus of a laser beam by means of the gradient force. A nanoparticle has to be controllably delivered to the focal region of the laser beam. We will explore the electrospray technique to controllably inject nanoparticles into an optical trap working in air.
Resonant optical nano-antennas
The scope of this project is to adapt a fabrication process for optical antennas to transparent substrates and study plasmon-plasmon interactions in these fabricated structures.
Feedback stabilization of a micro droplet in an optical trap
The project consists of building an optical trap and conducting position measure- ments of the droplet as a function of laser power. In a second step, a PID feedback loop will be implemented to actively stabilize the trap.
Development of a reflection-type near-field optical microscope
In this project a reflection-type near-field optical microscope will be designed, developed and characterized.
Optimization of tapered fiber probes
In this project, a commercial fiber-puller will be used to fabricate tapered fiber probes. A CO2 laser heats a section of the fiber and melts it locally. Simultaneously the fiber is being stretched by a lateral mechanical force, which results in a fiber taper, which breaks when sufficiently thin.
Automated nanoparticle loading
Levitation optomechanics systems consist of a nanoparticle that is optically trapped and levitated by a focused laser beam under vacuum conditions. The aim of this project is to design and build a reliable and automated nanoparticle loading process that can be triggered remotely.
Programmable generation of arbitrary field distributions
A spatial light modulator (SLM) is a two-dimensional array of phase-retarding elements (2 million pixels). In this project a pair of liquid crystal SLMs will be used to generate an arbitrary programmable field distribution in a cross-sectional plane (x,y).

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