@inproceedings{YilmazogluAlDaffaieHartnageletal.2012, author = {Yilmazoglu, Oktay and Al-Daffaie, Shihab and Hartnagel, Hans and Joshi, Ravi and Yadav, Sandeep and Schneider, J{\"o}rg and Nick, Christoph and Thielemann, Christiane}, title = {CNT photocathodes based on GaAs high-frequency photoswitches}, series = {25th International Vacuum Nanoelectronics Conference, 9 - 13 July 2012, Jeju, South Korea}, booktitle = {25th International Vacuum Nanoelectronics Conference, 9 - 13 July 2012, Jeju, South Korea}, doi = {10.1109/IVNC.2012.6316840}, year = {2012}, abstract = {A high-frequency photocathode based on carbon nanotube (CNT) blocks on semiisolating GaAs or low-temperature grown GaAs was fabricated and used for electron emission in a diode configuration. The CNT blocks can achieve high currents and current densities of I=0.5 mA and J=28 mA/cm 2 at E=2.1 V/μm, respectively. The photomodulation was achieved with a GaAs photoswitch electrically connected to the bottom of the CNT block emitter. This photocathode can find applications in high frequency tubes and optically driven X-ray sources.}, subject = {Kohlenstoff-Nanor{\"o}hre}, language = {en} }