Publications by Wuzhou Song | EPFL Graph Search

Related publications (23)

Biogenic and biomass burning organic aerosol in a boreal forest at Hyytiala, Finland, during HUMPPA-COPEC 2010

Submicron aerosol particles were collected during July and August 2010 in Hyytiala, Finland, to determine the composition and sources of aerosol at that boreal forest site. Submicron particles were collected on Teflon filters and analyzed by Fourier transf ...

Copernicus Publications2013

Microfluidic photoelectrocatalytic reactors for water purification with an integrated visible-light source

Wuzhou Song

This paper reports experimental studies using the photoelectrocatalytic effect to eliminate a fundamental limit of photocatalysis - the recombination of photo-excited electrons and holes. The fabricated reactor has a planar reaction chamber (10 x 10 x 0.1 ...

Royal Soc Chemistry2012

Pneumatically tunable optofluidic 2 x 2 switch for reconfigurable optical circuit

Demetri Psaltis, Wuzhou Song

We presented a pneumatically tunable 2 x 2 optofluidic switch for on-chip light routing that was controlled by compressed air. The device was fabricated with an optically clear elastomer-polydimethylsiloxane ( PDMS)-by soft-lithography. The optical switchi ...

Royal Society of Chemistry2011

Electrically tunable optofluidic light switch for reconfigurable solar lighting

Demetri Psaltis, Wuzhou Song

We describe a reconfigurable lighting system for indoor solar illumination which provides a new way for solar energy conservation. We have experimentally demonstrated an electrically tunable optofluidic light switch which takes the key role for the reconfi ...

Royal Society of Chemistry2013

Imaging based optofluidic air flow meter with polymer interferometers defined by soft lithography

Demetri Psaltis, Wuzhou Song

We present an optofluidic chip with integrated polymer interferometers for measuring both the microfluidic air pressure and flow rate. The chip contains a microfluidic circuit and optical cavities on a polymer which was defined by soft lithography. The pre ...

2010

Optofluidic membrane interferometer: An imaging method for measuring microfluidic pressure and flow rate simultaneously on a chip

Demetri Psaltis, Wuzhou Song

We present a novel image-based method to measure the on-chip microfluidic pressure and flow rate simultaneously by using the integrated optofluidic membrane interferometers (OMIs). The device was constructed with two layers of structured polydimethylsiloxa ...

American Institute of Physics2011

Optofluidic evanescent dye laser based on a distributed feedback circular grating

Demetri Psaltis, Wuzhou Song, Andreas Vasdekis

We demonstrate an optofluidic evanescent laser based on a solid circular distributed feedback grating with the dye solution acting as the cladding layer. The laser mode is confined within the grating and experiences optical gain via the interaction between ...

2009

Surface optofluidics

Demetri Psaltis, Wuzhou Song, Jae-Woo Choi, Andreas Vasdekis, Julien Cuennet

Surfaces -defined as the interfaces between solids and liquids- have attracted much attention in optics and biology, such as total internal reflection imaging (TIRF) and DNA microarrays. Within the context of optofluidics however, surfaces have received li ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2010

Superhydrophobic bull's-eye for surface-enhanced Raman scattering

Demetri Psaltis, Wuzhou Song

We present a micro-patterned silicon structure that enables the preparation of a substrate for surface-enhanced Raman scattering (SERS) and pre-concentration of the analyte molecules. The structure is designed to produce a hydrophobicity gradient. As a res ...

Royal Society of Chemistry2014

Development of Elastomeric Optofluidic Devices for Lasing and Sensing

Wuzhou Song

The term of optofluidics defines an emergent research field that combines microfluidics and optics. In many lab-on-a-chip applications, these two technologies are used in combining the microfluidics for sample delivery and optics for sensing and controllin ...

EPFL2012

Imaging based interferometric pressure sensor

Demetri Psaltis, Wuzhou Song

An imaging based interferometric pressure sensor apparatus compromise a fluid pressure sensor unit (1) and an optical monitor (2). The disposable pressure sensor part comprises a rigid transparent cover plate 3 and a flexible diaphragm (4), in between form ...

2011

Pneumatically tunable optofluidic dye laser

Demetri Psaltis, Wuzhou Song

We presented a tunable optofluidic dye laser with integrated elastomeric air-gap etalon controlled by air pressure. The chip was fabricated with polydimethylsiloxane (PDMS) via replica molding. It comprises a liquid waveguide and microscale air-gap mirrors ...

2010

Optofluidic differential spectroscopy for absorbance detection of sub-nanolitre liquid samples

Wuzhou Song

We present a novel optofluidic differential method for carrying out absorbance spectroscopy of subnanolitre volumes of liquid samples on a microfluidic chip. Due to the reduction of liquid volume, the absorbance detection in microfluidics is often hindered ...

Royal Society of Chemistry2012

Low-order distributed feedback optofluidic dye laser with reduced threshold

Demetri Psaltis, Wuzhou Song, Andreas Vasdekis

We report the demonstration of low order distributed feedback (DFB) optofluidic dye lasers with reduced threshold. The laser chips were realized in polydimethylsiloxane using replica molding with two masters. A comparison between first, second, and third o ...

2009

Tunable optofluidic dye laser with novel cavity

Demetri Psaltis, Wuzhou Song, Andreas Vasdekis

We present a pressured mediated tunable optofluidic dye laser with novel cavity. The dye laser chip was fabricated with Polydimethylsiloxane (PDMS) via replica molding and has none nano-features. It comprises a liquid waveguide and micro-scale air-gap cham ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2010

Towards 6G: Configurable High-Throughput Decoder Implementation for SC-LDPC Codes

Andreas Peter Burg, Wuzhou Song, Yifei Shen, Yuqing Ren

Spatially-coupled low-density parity-check (SC-LDPC) codes are considered an important candidate for the upcoming 6G standardization, owing to their superior error-correction capability and practical decoding complexity. However, current high-throughput SC ...

IEEE2024

Optofluidic pressure sensor based on interferometric imaging

Demetri Psaltis, Wuzhou Song

We present a chip-scale optofluidic interferometric sensor for measuring liquid pressure based on an imaging method. The chip was constructed with a polymer by multilayer soft lithography. It consists of a flexible air gap optical cavity, which, upon illum ...

2010

Optofluidic distributed feedback dye laser via evanescent gain

Demetri Psaltis, Wuzhou Song, Andreas Vasdekis

We demonstrate optofluidic evanescent dye lasers based on two types of solid distributed feedback (DFB) grating cavities- the first order linear DFB gratings which gives in-plane laser emitting and second order circular DFB gratings which gives surface las ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2010

Novel tuning method for optofluidics

Demetri Psaltis, Wuzhou Song

We introduce a novel tuning mechanism for optofluidic devices by embedding pressure driven actuator inside microfluidic chips. Multiple tunable optofluidic devices remotely controlled by the pressure of air or liquid were demonstrated. ...

Ieee Service Center2009

Micro-Air-Bag Actuated Tunable Optofluidic Elements

Demetri Psaltis, Wuzhou Song, Jae-Woo Choi, Andreas Vasdekis

We introduce for the first time a tuning mechanism for optofluidic devices by embedding a Micro-Air-Bag (MAB) actuator inside a microfluidic chip. Multiple tunable optical elements controlled through the pressure of compressed air were demonstrated. (C)200 ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009