We present a new pulsed laser oscillator and system for the optical detection of ultrasound in materials. A single-frequency laser oscillator based on a pulse pumped Nd:YAG rod inside a ring cavity is proposed. The laser delivers single-frequency pulses of 35 W power. Power of about 1 kW can be obtained when the second rod of a dual-rod pumping chamber is used as an amplifier. Performance of th...

Challenges and opportunities:•The pursuit of electrically pumped organic lasers remains a grand challenge due to unbalanced optical gain carrier mobility, as well triplet losses associated with electrical injection into the semiconductors.•Recent progresses respect molecular design, theoretical prediction, device fabrication for light-emitting semiconductors inspire us that deep understanding r...

This study was undertaken to prove that voltage-sensitive calcium channels controlling the photophobic stop response of the unicellular green alga Chlamydomonas reinhardtii are exclusively found in the flagellar region of the cell and to answer the question as to their exact localization within the flagellar membrane. The strategy used was to amputate flagella to a variable degree without pertu...

High-resolution photomicrographs of phytoplankton cells and chains can now be acquired with imagingin-flow systems at rates that make manual identification impractical for many applications. To address the challenge for automated taxonomic identification of images generated by our custom-built submersible Imaging FlowCytobot, we developed an approach that relies on extraction of image features,...

Most important research results that explain why the work was done, what was accomplished, and how it pushed scientific frontiers or advanced the field. Diamond holds substantial promise as a high Raman gain laser material with outstanding power handling capability, yet despite this the highest reported output power from a diamond Raman laser prior to this project was approximat...