Publications de Demetri Psaltis

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Nonlinear phase contrast enhancement

Demetri Psaltis, Alexandre Goy

We demonstrate a simple method to detect small phase steps using propagation in Kerr media. In experiments, nonlinear diffraction in acetone produced high contrast signals for a pi/80 phase mask. (C) 2010 Optical Society of America ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Optofluidic applications with lithium niobate nanowires

Demetri Psaltis, Ye Pu, Rachel Grange, Chia-Lung Hsieh, Jae-Woo Choi

We report the hydrothermal synthesis of free-standing lithium niobate nanowires. We show that the versatile properties of bulk lithium niobate such as nonlinear optical effects can be exploited at the nanoscale. We describe the fabrication of polydimethyls ...

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

Enhanced Second Harmonic Generation in Plasmonic Nanocavities

Demetri Psaltis, Ye Pu, Rachel Grange, Chia-Lung Hsieh

We experimentally demonstrate significantly enhanced second harmonic generation using nanoengineered plasmonic nanocavities of core-shell structures (BaTiO3/Au). An enhancement factor of over 500 is measured in the second harmonic scattering efficiency com ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

3-dimensional electrode patterning within a microfluidic channel using metal ion implantation

Demetri Psaltis, Herbert Shea, Samuel Rosset, Muhamed Niklaus, Jae-Woo Choi, James Adleman

The application of electrical fields within a microfluidic channel enables many forms of manipulation necessary for lab-on-a-chip devices. Patterning electrodes inside the microfluidic channel generally requires multi-step optical lithography. Here, we uti ...

Royal Society of Chemistry2010

Inline holographic coherent anti-Stokes Raman microscopy

Demetri Psaltis, Ho Ling Li, Kun Shi

We demonstrate a simple approach for inline holographic coherent anti-Stokes Raman scattering (CARS) microscopy, in which a layer of uniform nonlinear medium is placed in front of a specimen to be imaged. The reference wave created by four-wave mixing in t ...

2010

Optofluidic distributed feedback dye laser via evanescent gain

Demetri Psaltis, Andreas Vasdekis, Wuzhou Song

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

Tunable optofluidic dye laser with novel cavity

Demetri Psaltis, Andreas Vasdekis, Wuzhou Song

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

Tuning Mechanisms in Optofluidics

Demetri Psaltis, Wuzhou Song, Jae-Woo Choi

Novel functionalities have been developed through the fusion of optics and microfluidics. We categorize the different possible tuning mechanisms in optofluidics and describe the recent examples in each category. (C)2010 Optical Society of America ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Optically Generated Electric Fields by Lithium Niobate Nanowires

Demetri Psaltis, László Forró, Arnaud Magrez, Ye Pu, Rachel Grange, Chia-Lung Hsieh, Jae-Woo Choi, Rita Smajda

We demonstrate that lithium niobate nanowires generate electric fields under 514 nm continuous wave laser illumination. Birefringent media are used to visualize the generated fields in a microfluidic channel. Input laser polarization dependence is shown. ( ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Demetri Psaltis

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Nonlinear phase contrast enhancement

Optofluidic applications with lithium niobate nanowires

Enhanced Second Harmonic Generation in Plasmonic Nanocavities

3-dimensional electrode patterning within a microfluidic channel using metal ion implantation

Inline holographic coherent anti-Stokes Raman microscopy

Pneumatically tunable optofluidic dye laser

Optofluidic distributed feedback dye laser via evanescent gain

Tunable optofluidic dye laser with novel cavity

Tuning Mechanisms in Optofluidics

Optically Generated Electric Fields by Lithium Niobate Nanowires

Nonlinear phase contrast enhancement

Inline holographic coherent anti-Stokes Raman microscopy

Pneumatically tunable optofluidic dye laser

Optofluidic distributed feedback dye laser via evanescent gain

Optofluidic applications with lithium niobate nanowires

Enhanced Second Harmonic Generation in Plasmonic Nanocavities

3-dimensional electrode patterning within a microfluidic channel using metal ion implantation

Tunable optofluidic dye laser with novel cavity

Tuning Mechanisms in Optofluidics

Optically Generated Electric Fields by Lithium Niobate Nanowires