PMID- 27410292 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20180129 LR - 20181023 IS - 1094-4087 (Electronic) IS - 1094-4087 (Linking) VI - 24 IP - 12 DP - 2016 Jun 13 TI - New optical gating technique for detection of electric field waveforms with subpicosecond resolution. PG - 12730-9 LID - 10.1364/OE.24.012730 [doi] AB - The new optical gating technique uses a femtosecond optical laser pulses for the photoconductive detection of short pulses of terahertz (THz) radiation. This technique reproduces the shape of the THz pulse and after pulse plasmonic response of the two-dimensional electron gas in a short channel high electron mobility transistor (HEMT). The results are in excellent agreement with the electro-optic effect measurements and with the simulation results obtained in the frame of a two-dimensional hydrodynamic model. The femtosecond optical laser pulse time is delayed with respect to the THz pulse and generates a large concentration of the electron-hole pairs in the AlGaAs/InGaAs HEMT. This drastically increases the channel conductivity on the femtosecond scale and effectively shorts the device quenching the transistor response. The achieved time resolution is better than 250 femtoseconds and could be improved using shorter femtosecond laser pulses. The spatial resolution of this technique is on the order of tens of nanometers or even smaller. It could be applied for studying the electron transport in a variety of electronic devices ranging from silicon MOSFETs to heterostructure bipolar transistors. FAU - Muraviev, Andrey AU - Muraviev A FAU - Gutin, Alexey AU - Gutin A FAU - Rupper, Greg AU - Rupper G FAU - Rudin, Sergey AU - Rudin S FAU - Shen, Xiaohan AU - Shen X FAU - Yamaguchi, Masashi AU - Yamaguchi M FAU - Aizin, Gregory AU - Aizin G FAU - Shur, Michael AU - Shur M LA - eng PT - Journal Article PL - United States TA - Opt Express JT - Optics express JID - 101137103 EDAT- 2016/07/15 06:00 MHDA- 2016/07/15 06:01 CRDT- 2016/07/14 06:00 PHST- 2016/07/14 06:00 [entrez] PHST- 2016/07/15 06:00 [pubmed] PHST- 2016/07/15 06:01 [medline] AID - 344260 [pii] AID - 10.1364/OE.24.012730 [doi] PST - ppublish SO - Opt Express. 2016 Jun 13;24(12):12730-9. doi: 10.1364/OE.24.012730.