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Ambipolar injection into pentacene field effect transistor observed by time-resolved optical second harmonic generation imaging

Manaka T., Nakao M., Lim E., Iwamoto M.

Materials Science Poland

2009

Vol. 27, No. 3

709--717

Ambipolar carrier injection from gold electrode into pentacene was investigated by time-resolved optical second harmonic generation (TRM-SHG) imaging. Smooth hole injection is verified by rapid decrease of the SHG intensity at the electrode edge, indicating the absence of an injection barrier. In contrast, TRM-SHG results clearly indicated the presence of electron injection from the high-work function metal into the electrode, though after injection electrons were trapped in the channel and could not contribute to the conduction. Transient electric field distribution due to the injected holes and electrons were evaluated based on the SHG intensity distribution.

Spectral Division of the Optical Fiber Passband Using Narrowband Controllable Filter on the Base of Semiconductor Waveguide Microresonator

Goncharenko I., Esman A., Zykov G., Kuleshov V., Marciniak M., Pilipovich V.

Journal of Telecommunications and Information Technology

2008

nr 4

67-72

We analyze the new principle of multichannel spectral division of optical fiber passband using controllable narrowband integrated optical filters composed of two-coupled ring microresonators made of different semiconductor materials. It is shown that appropriate selecting the semiconductor material and optimizing the design factors of selective optical element allows creating the simple and economical integrated optical filter with bandwidth 0.1 nm, frequency separation between adjacent optical carriers 0.2 nm and signal-to-noise ratio 50 dB. Utilizing such filters in optical fiber communication lines makes it possible to increase the number of transmitted in parallel optical carrier wavelengths up to 160 and even more, i.e., to provide the traffic transmission with the speed up to 1.6 Tbit/s in one direction and in single optical fiber.

Some further description for a current flow trough an amorphous solid. A case of an imperfect contact

Świstacz B.

Electronics and Telecommunications Quarterly

2007

Vol. 53, No 2

143-154

Including a secondary electron emission for the cathode in a double injection problem, a new mathematical model is presented. In a planar capacitor system the carrier mobilities are discontinuous. The metal-solid-metal system can act as an n-n or p-n blocking diode. A new boundary condition for the "V" type current-voltage characteristic is determined.