A5075659237- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Mechanical and Optical Resonators
- Advanced Fiber Optic Sensors
- Innovative Microfluidic and Catalytic Techniques Innovation
- Neural Networks and Reservoir Computing
- Surface Modification and Superhydrophobicity
- Photonic Crystals and Applications
- Electrowetting and Microfluidic Technologies
- Nanofabrication and Lithography Techniques
- Microfluidic and Capillary Electrophoresis Applications
- Advanced MEMS and NEMS Technologies
Karlsruhe Institute of Technology
2015-2018
Karlsruhe University of Education
2015
We present an all-polymer photonic sensing platform based on whispering-gallery mode microgoblet lasers integrated into a microfluidic chip. The chip is entirely made from polymers, enabling the use of devices as low-cost disposables. cavities feature quality factors exceeding 10(5) and are fabricated poly(methyl methacrylate) (PMMA) using spin-coating, mask-based optical lithography, wet chemical etching, thermal reflow. In contrast to silica-based microtoroid resonators, this approach...
Optical micro-resonators have broad applications. They are used, for example, to enhance light-matter interactions in optical sensors or as model systems investigating fundamental physical mechanisms cavity quantum electrodynamics. Coupling two more micro-cavities is particularly interesting it enlarges the design freedom and field of application. In this context, achieving tunability coupling strength hence inter-cavity gap utmost importance adjusting properties coupled micro-resonator...
Whispering-gallery mode (WGM) microdisk lasers show great potential for highly sensitive label-free detection in large-scale sensor arrays. However, when used practical applications under normal ambient conditions, these devices suffer from temperature fluctuations and photobleaching. Here we demonstrate that challenges can be overcome by a novel referencing scheme allows simultaneous compensation of drift The technique relies on reference structures protected locally dispensed passivation...
WGM biosensor arrays are integrated with a DMF system. The viability of the system is demonstrated by refractive-index and biosensing experiments.
Microgoblet laser pairs are presented for cross-referenced on-chip biomolecular sensing. Parallel readout of the microlasers facilitates effective mutual filtering highly localized refractive index and temperature fluctuations in analyte. Cross-referenced detection two different types proteins complete chemical transducer reconfiguration is demonstrated. Selective surface functionalization individual lasers with high spatial accuracy achieved by aligned microcontact stamping. In recent past...
Integration of optically active materials into whispering gallery mode (WGM) cavities enables low-threshold laser emission. In contrast to their passive counterparts, the WGMs these microlasers can be pumped and read out easily via free-space optics. The interact with cavity environment evanescent field, thus lend themselves label-free bio-sensing. detection limit such sensors, given as ratio resolution whole measurement system sensitivity WGMs, is an important figure merit. this work we...
We demonstrate lasing in optically pumped hybrid devices that combine passive Si3N4 waveguides with active organic cladding materials. Si3N4-organic (SiNOH) lasers lend themselves to low-cost integration and parallel read-out of large-scale sensor arrays.
Silicon nitride (Si3N4) waveguides offer low-loss wave propagation over a wide spectral range including visible wavelengths and lend themselves to photonic integrated circuits for bio-photonic applications. The Si3N4 device portfolio, however, is so far limited passive devices that need be fed by external light sources. This often requires delicate costly fiber-chip coupling schemes are subject stringent alignment tolerances. In this paper, we present investigate class of lasers combine with...
Driven by optical communications, a powerful toolbox for photonic integration has emerged over the last years. We review specific opportunities that can be unlocked applying these technologies to field of metrology and sensing.
Photonic molecules consisting of dye-doped polymeric WGM resonators exhibiting super-mode lasing are realized post fabrication by reducing the gap between cavities. Flexible elastomer substrates allow a precise tuning coupling gap.
We present our latest results on microgoblet lasers as biosensors. Surface functionalization is performed with high resolution and throughput by aligned microcontact stamping. show simultaneous device readout, the resulting cross-referencing capabilities reconfiguration.
We report on the fabrication of polymeric whispering-gallery mode (WGM) lasers. Our approach enables high packing density by vertical stacking and multiplexed readout resonators lends itself to signal referencing or multi-target sensing.
In article 1500066, U. Bog, M. Hirtz, and co-workers demonstrate on-chip biomolecular sensing using whispering-gallery-mode microgoblet lasers. Biomolecular detection is usually affected by signal disturbances, induced refractive index temperature fluctuations inside the liquid analyte. The densely packed laser pairs enable mutual localized filtering of such disturbances. sensor functionalization performed aligned microcontact stamping, resulting in a highly localized,...
We review fabrication and optics of polymeric high-Q whispering gallery mode resonators. They are employed as bio-sensors featuring selective parallel functionalization arrays integration into lab-on-a-chip systems. Liquid crystalline elastomers enable wide tunability resonances. Elastomer substrates allow photonic molecules with tunable coupling gap.