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This project will investigate the high speed modulation properties of monolithically integrated coupled-cavity VCSEL arrays with the aim of developing manufacturable, very high speed (>20GHz) directly modulated integrated laser arrays which have very low power dissipation (

In diverse application areas there is a need to develop magnetic field sensors which resolve small (nanoTesla-level) field perturbations at low (Hertz and milliHertz) frequencies. The emerging technology of spin-dependent tunneling is promising in that its attributes include low power, small size, low cost, IC compatibility (uses standard silicon microelectronics processing), and broad-band frequ ...

Negative-electron-affinity (NEA) photocathodes, which produce polarized electrons, are a vital component of current electron accelerators. However, future systems, such as the International Linear Collider (ILC), will require significant upgrades to these photocathodes. For example, the polarized electron beam intensity will need to be at least 20 times greater than that produced by strained GaA ...

Negative-electron-affinity photocathodes, which produce polarized electrons, are a vital component of electron accelerators such as that at the Stanford Linear Accelerator Center. Future systems, such as the International Linear Collider, will require a polarized electron beam intensity at least 20 times greater than produced by strained GaAs, which is used in the current generation of photocatho ...

Freeform optical surfaces offer advantages over axis-symmetric surfaces in the ability to reduce optical sizes, increase performance and reduce aberrations. However, the description, fabrication and metrology of these surfaces can be difficult and costly, prohibiting their ability to achieve their full potential. Fabrication of these surfaces can be difficult, since they are not axis-symmetric and ...