The manipulation of highly localized fields of surface plasmon polaritons (SPPs) forms the backbone for a vast field of applications. We investigate the SPPs excited on a single crystalline gold nanoplatelet milled with a plasmonic lens structure using a scattering type scanning near field optical microscope.
SPPs are excited at different wavelengths in the visible regime employing a new tunable continuous wave source. Wave vector selection of the SPPs by the gold structures corresponded well with the numerically calculated dispersion relationship. Please find the application note from Max Planck Institute for Solid State Research together with University of Stuttgart and Stuttgart Research Center of Photonic Engineering here:
Hübner Photonics’ C-WAVE is the tunable laser light source for continuous-wave (cw) emission in the visible and near-infrared wavelength range. Its technology is based on optical parametric oscillation (OPO) and it is fully computer controlled. Thus, it allows you to tune from blue to red and into the near-infrared without any change of dyes or optical components. This makes C-WAVE a flexible and user friendly laser for your applications.
Visible, widely tunable, continuous-wave – for a long time this was equivalent to the handling of toxic dyes, to changing laser media or resonator mirrors or the restriction to narrow tuning ranges. C-WAVE is a solid state system that has no consumable components such as dyes. The wavelength can be simply set at the computer. C-WAVE tunes itself automatically and guarantees superior beam quality as well as output stability across the whole tuning range – offering both high flexibility and precision at the same time. It offers you single frequency operation, narrow spectral linewidth and options for frequency stabilization combined with an unprecedented spectral coverage. Change the way you work and focus on your research, not on laser handling: C-WAVE helps you free your mind for your main tasks; Two-step light conversion into the visible spectrum, Frequency conversion scheme of the C-WAVE, Measured beam profile and intensity cross sections.
Depending on the required output power level, c-wave is either pumped by an external single-frequency laser or comes with an integrated laser, making operation and application even easier for you. C-WAVE can be tailored to your needs.
Using software module AbsoluteLambda™ for C-WAVE enables precision and automatic frequency control with accuracy up to 2 MHz*. Applications:
- Cold atom / Ion trapping
- Atomic physics
- Quantum optics
- Single molecule spectroscopy
The C-WAVE (from Hübner GmbH & Co. KG) is the only continuous-wave and single-frequency laser light source that covers the wavelength ranges 450 – 525 nm, 532 nm, 540 – 650 nm, 900 – 1050 nm, and 1080 – 1300 nm as a single laser device. Until now, this wavelength coverage has only been achieved with pulsed laser light sources.
The wavelength tuning of C-WAVE is fully computer controlled: no manual change of optics or crystals is required and no realignment is necessary. All other widely tunable continuous-wave laser light sources that cover parts of the visible wavelength range require manual change of crystals, dyes or optics, or even a realignment after tuning.
The C-WAVE is the only widely tunable continuous laser light source for the visible wavelength range that can be transported between different labs. Other laser systems require an extensive set-up and realignment procedure after change of location.
All properties listed above have been implemented for various pulsed lasers, but Hübner’s C-WAVE is currently the only continuous-wave laser that comprises these characteristics.
Parts of the technology have been registered at the “Europäische Patentanmeldung”.
Brief summary of content: The patent describes the advantageous usage of both the signal and the idler waves originating from the OPO process for generating tunable laser light in the wide range of C-WAVE´s spectral coverage. Furthermore, a specific oven construction allows for gradient heating of the OPO crystal to improve the phase matching capabilities and thus the performance of the setup.
see also SPIE: Prism Award