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They may sound like weapons for Ant-Man’s next nemesis, but the microscopic lasers could greatly improve biologists’ ability to
track the movement of individual cells—a possible boon to fields ranging from developmental biology to cancer research.
这篇文章主要是讲制造细胞大小的激光器。它的优势是非常明显的，可以比fluorescence和radio frequency ID更好。
不过要制造一台激光器，就需要有两个条件：
- 能够受到激发而产生光的材料，一般是指晶体
- 一个共振腔
难点在于如何在细胞里装进一个容器
以下尝试：
- In culture, they mixed cells with tiny plastic spheres 5 to 10 micrometers in diameter that had been “doped” with a fluorescent dye. The beads served as the cavities, the dye as the medium.
- get cells to take up plastic beads, and they created two other kinds of resonating spheres as well
那这么做的目的在于什么呢？
- 追踪细胞的运动，每一个细胞的塑料球都是有一点不同，这样他们的激发出来的激光就会有一点波长上的区别。这样就可以分开每个细胞了。
- 每种tissue会吸收不同的beads，那么相比于fluorescence，则有着更大的优势。可以定位millions of cells
难点，更小的beads，更好的吸收。
