532 nm

In St. Lawrence’s Raman spectroscopy and microscopy lab, the most potent laser illumination source comes from a neodymium-doped yttrium aluminum garnet. This is a pretty ubiquitous laser source, but I happen to like it because it also demonstrates the value of nonlinear optics: though this laser is emitting light at 1064 nanometers (in the infrared), a suitable doubling crystal can combine two of those 1064 photons together to make a shiny new 532 nm photon.

532 nm

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Arinell’s Pizza

Like any college town, Berkeley is beset with pizza joints. Almost all of them offer a delicious slice, but a lot of those slices are, well, not really pizza. Deep dish so thick and dense that knife and fork are mandatory? All-organic cheese detonation without sauce? Pizza bagel? All of these can be mouth-watering under the right conditions, but quintessential crispy-yet-foldable slice of (New-York-inspired) pizza is found at Arinell’s in downtown Berkeley. The venue matches the food.

Arinell's Pizza