Knowledge Bank

Tip-enhanced Raman spectroscopy (TERS) is an approach that has been well recognized and relies on strongly localized enhancement of Raman scattering of laser light at the point of a near atomically sharp tip. However, not least due to the lack of sources delivering laser light tunable throughout the visible spectral range, the vast majority of TERS experiments so far has been limited to single excitation wavelengths. Read about how a CW tuanble laser can help change this!

There are essentially 5 types of solid state laser technology which meet the need for long coherence length in order to write holograms or HOE´s. All offering unique wavelengths, either fixed or tunable and output powers from 10´s mW up to multiple watts.

In the field of biology it is a general consensus that cancerous cells often use other metabolic pathways, than corresponding healthy cells, and thereby consume less oxygen. Read our application note on TRAST microscopy for measuring oxygen concentration in cancerous cells.

In the experimental quantum research community, widely tunable continuous-wave optical parametric oscillators (CW OPOs) are gaining recognition as novel sources of tunable laser light with great potential – not least due to their unprecedented wavelength coverage. Yet, the overall experimental requirements remain often challenging for the performance of turnkey OPO devices.

The Cobolt Rogue™ 640 nm is multi-longitudinal mode in a perfect TEM00 beam with 1 W output power, ideally suited for super resolution STORM microscopy.