Del Mar Photonics - Del Mar Photonics at Optics and Photonics 2008

Silica-based diffractive/refractive hybrid microlenses fabricated by multiphoton lithography (Poster Presentation)
Paper 7056-55 of Conference 7056
Authors(s): Hiroaki Nishiyama, Mizue Mizoshiri, Osaka Univ. (Japan); Junji Nishii, National Institute of Advanced Industrial Science and Technology (Japan); Yoshinori Hirata, Osaka Univ. (Japan)
Date: Tuesday, 12 August 2008
SiO2-based diffractive/refractive hybrid microlenses were created by use of femtosecond laser lithography-assisted micromachining (FLAM). Diffractive optical elements of inorganic materials are expected to be used for optical interconnection, information appliances, and so on. In this study, we proposed the FLAM for microfabrication upon nonplanar surfaces such as lens structures, which was difficult for conventional photolithography technique. By use of femtosecond laser-induced nonlinear optical absorption, the fine resist patterns were formed even on nonplanar substrates. We could obtain SiO2 microFresnel lens upon convex lenses after pattern transfer by plasma. FLAM is one of effective ways for integrated photonic devices.

Fabrication of metallic nanostructures with combination of laser nanolithography and selected surface metallization (Paper Presentation)
Paper 7033-2 of Conference 7033
Authors(s): Xuan-Ming Duan, Technical Institute of Physics and Chemistry (China); Wei-Kang Wang, Yao-Yu Cao, Xian-Zi Dong, Technical Institute of Physics and Chemistry (China) and Graduate School of Chinese Academy of Sciences (China); Wei-Qiang Chen, Zhen-Sheng Zhao, Technical Institute of Physics and Chemistry (China)
Date: Sunday, 10 August 2008
Multiphoton processes have been widely used to fabricate micro/nanometer-scaled 2D and 3D microstructures. Toward photonic and plasmonic applications, many 2D and 3D microstructures have been successfully created using multiphoton processes with polymers, dielectrics and metals. Selected metallization on polymeric structures is a useful route to obtain complex metallic structures. In this paper, we report the fabrication metallic nanostructures with combination of multiphoton nanolithography and selected metallization. Using a novel method of selected metallization developed by ourselves, metallic films with thickness smaller than 100 nm were successfully deposited on polymer surface and metallic nanostructures were also obtained.

Dependence of the multiphoton luminescence spectrum of single gold nanoparticles on the refractive index of the surrounding medium (Paper Presentation)
Paper 7032-67 of Conference 7032
Authors(s): Michael Ruosch, Dominik Marti, Patrick Stoller, Jaroslav Ricka, Martin Frenz, Univ. Bern (Switzerland)
Date: Thursday, 14 August 2008
We calculated the multiphoton luminescence spectra of gold nanoparticles using the semi-classical approach of Boyd et al. (PRB, 33, p7923). We adapted their model to calculate the luminescence of single nanoparticles, which depends both on the band structure of gold and the local field enhancement factor at the particle’s surface. Changing the refractive index of the surrounding medium results in a redshift of gold’s plasmon resonance. The local field enhancement, which is linked to the plasmon resonance, also changes, resulting in a redshift of the luminescence. We present the results of studies using immersion media with different refractive indices.

Nonlinear optical properties of thin gold films and individual nanoholes (Paper Presentation)
Paper 7032-74 of Conference 7032
Authors(s): Serge Grabtchak, Joe Cole, Nikolay Mirin, Naomi Halas, Rice Univ.
Date: Thursday, 14 August 2008
Second-harmonic generation, multiphoton luminescence and Z-scan measurements were simultaneously performed on gold films and individual nanoholes with a fsec Ti:Sapphire laser. For 16 nm films SHG and luminescence respond differently to defocusing with SHG dropping by ~3 orders of magnitude at high powers, consistent with increasing effects of morphological changes in the film. Scanning the fundamental across the nanohole reveals a complex but highly reproducible periodic SHG signal detectable when excited as far as ~12 microns away from the hole, which is related to the excitation of surface plasmons via the nanohole as an excitation point.

A nanometer-sized few femtosecond electron source at high-repetition rates (Paper Presentation)
Paper 7032-12 of Conference 7032
Authors(s): Christoph Lienau, Carl von Ossietzky Univ. Oldenburg (Germany)
Date: Sunday, 10 August 2008

Related Del Mar Photonics products

Femtosecond Lasers - Reserve a spot in our femtosecond Ti:Sapphire training workshop during this summer in San Diego, California

Trestles femtosecond Ti:Sapphire laser
Trestles Finesse femtosecond Ti:Sapphire laser with integrated DPSS pump laser
Teahupoo Rider femtosecond amplified Ti:Sapphire laser
Mavericks femtosecond Cr:Forsterite laser
Tamarack femtosecond fiber laser (Er-doped fiber)
Buccaneer femtosecond OA fiber laser (Er-doped fiber) and SHG
Cannon Ultra-broadband light source
Tourmaline femtosecond Yt-doped fiber laser
Chata femtosecond Cr:ZnSe laser (2.5 micron) coming soon
Phonics West 2008: applications of femtosecond lasers

High Power Femtosecond Laser Systems - Reserve a spot in our femtosecond Ti:Sapphire training workshop during this summer in San Diego, California

Cortes 800 tabletop 40 TW Ti:Sapphire laser system
Cortes E  - High vacuum laser ablation/deposition system with 2 TW Ti:Sapphire laser
Cortes K - femtosecond seed laser for Petawatt KrF excimer laser
Cortes O 200TW femtosecond laser - KD*P CPOPA based amplifier system
Jaws femtosecond Cr:forsterite Multi-Terawatt Amplified Laser
High-vacuum system for laser ablation/deposition

Femtosecond pulse measurement instrumentation - Reserve a spot in our femtosecond Ti:Sapphire training workshop during this summer in San Diego, California

Reef scanning and single shot femtosecond autocorrelators
Avoca SPIDER - Spectral phase interferometry for direct electric-field reconstruction (SPIDER)
Rincon third order femtosecond cross-correlator (third order autocorrelator TOAC) also referred to as contrastmeter

Ultrafast Dynamics Research Tools  - Reserve a spot in our Ultrafast Dynamics Tools training workshop during this summer in San Diego, California

Beacon femtosecond fluorescence up-conversion (optical gating) spectrometer
Hatteras Ultrafast Transient Absorption Spectrometer

Femtosecond Systems and Accessories - Reserve a spot in our femtosecond Ti:Sapphire training workshop during this summer in San Diego, California

Femtosecond Micromachining
Femtosecond nanophotonics
Femtosecond NSOM
Pacifica femtosecond fiber laser based terahertz spectrometer
Pismo pulse picker (ultrafast electro-optical shutter)
Wavelength conversion: second and third harmonics generators for femtosecond lasers
Jibe white light continuum generator
Kirra Optical Faraday Rotators and Isolators

Laser accessories

Diffractive Variable Attenuator for high power lasers
Deformable mirrors - active elements for adaptive optics systems - Reserve a spot in our  Adaptive optics and wavefront sensors workshop in San Diego
ShaH - the family of fast, accurate and reliable wavefront sensors
Complete adaptive optics systems
Faraday rotators and isolators for high-power (up to 1kW) laser beams
SAM - Saturable Absorber Mirrors
PCA - Photoconductive antenna for terahertz applications