Heikki Helava : rechercher sur Z-Library

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1

Growth of Low-Defect SiC and AlN Crystals in Refractory Metal Crucibles

Helava, Heikki I., Mokhov, Evgeny N., Avdeev, Oleg A., Ramm, Mark G., Litvin, Dmitri P., Vasiliev, Alexander V., Roenkov, Alexander D., Nagalyuk, Sergey S., Makarov, Yuri N.

Journal:

Materials Science Forum

Année:

2013

Langue:

english

Fichier:

PDF, 529 KB

english, 2013

2

Improved GaN films with low background doping and low deep trap density grown by hydride vapor phase epitaxy

Polyakov, Alexander, Smirnov, Nikolai, Govorkov, Anatoli, Kozhukhova, Elena, Yugova, Tatiana, Usikov, Alexander, Helava, Heikki, Makarov, Yuri

Journal:

Physica status solidi

Année:

2015

Langue:

english

Fichier:

PDF, 235 KB

english, 2015

3

AlN substrates and epitaxy results

Heikki Helava, Tat'jana Chemekova, Oleg Avdeev, Eugeny Mokhov, Sergey Nagalyuk, Yuri Makarov, Mark Ramm

Journal:

physica status solidi (c)

Année:

2010

Langue:

english

Fichier:

PDF, 296 KB

english, 2010

4

Characterization of HVPE-grown UV LED heterostructures

Kurin, Sergey, Antipov, Andrey, Barash, Iosif, Roenkov, Alexander, Usikov, Alexander, Helava, Heikki, Ratnikov, Valentin, Shmidt, Natalia, Sakharov, Alexey, Tarasov, Sergey, Menkovich, Ekaterina, Lamk

Journal:

Physica status solidi

Année:

2014

Langue:

english

Fichier:

PDF, 441 KB

english, 2014

5

CHVPE growth of AlGaN-based UV LEDs

Kurin, Sergey, Antipov, Andrey, Barash, Iosif, Roenkov, Alexander, Helava, Heikki, Tarasov, Sergey, Menkovich, Ekaterina, Lamkin, Ivan, Makarov, Yuri

Journal:

physica status solidi (c)

Année:

2013

Langue:

english

Fichier:

PDF, 364 KB

english, 2013

6

Intense relativistic electron beam injector system for tokamak current drive

Bailey, Vernon L., Creedon, John M., Ecker, Bruce M., Helava, Heikki I.

Journal:

Journal of Applied Physics

Année:

1983

Langue:

english

Fichier:

PDF, 1.04 MB

english, 1983

7

Structural defects responsible for excessive leakage current in Schottky diodes prepared on undoped n-GaN films grown by hydride vapor phase epitaxy

Polyakov, Alexander Y., Yakimov, Eugene B., Smirnov, Nikolai B., Govorkov, Anatoliy V., Usikov, Alexander S., Helava, Heikki, Makarov, Yuri N., Lee, In-Hwan

Journal:

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures

Année:

2014

Langue:

english

Fichier:

PDF, 2.17 MB

english, 2014

8

tokamak

Rice, John E., Molvig, Kim, Helava, Heikki I.

Journal:

Physical Review A

Année:

1982

Langue:

english

Fichier:

PDF, 753 KB

english, 1982

9

HVPE GaN Growth on 4H SiC and Die Dicing

Usikov, Alexander, Kurin, Sergey Yu., Barash, Iosif S., Roenkov, Alexander D., Antipov, Andrei, Khait, Oleg, Medvedev, Oleg, Helava, Heikki, Makarov, Yu.N.

Journal:

Materials Science Forum

Année:

2016

Langue:

english

Fichier:

PDF, 394 KB

english, 2016

10

Photoluminescence enhancement by localized surface plasmons in AlGaN/GaN/AlGaN double heterostructures

Polyakov, Alexander Y., Yun, Jin-Hyeon, Ahn, Haeng-Keun, Usikov, Alexander S., Yakimov, Eugene B., Tarelkin, Sergey A., Smirnov, Nikolai B., Shcherbachev, Kirill D., Helava, Heikki, Makarov, Yuri N.,

Journal:

physica status solidi (RRL) - Rapid Research Letters

Année:

2015

Langue:

english

Fichier:

PDF, 465 KB

english, 2015

11

Degradation of external quantum efficiency of AlGaN UV LEDs grown by hydride vapor phase epitaxy

Shmidt, Natalia, Usikov, Alexander, Shabunina, Eugenia, Chernyakov, Anton, Sakharov, Alexey, Kurin, Sergey, Antipov, Andrei, Barash, Iosif, Roenkov, Alexander, Helava, Heikki, Makarov, Yuri

Journal:

Physica status solidi

Année:

2015

Langue:

english

Fichier:

PDF, 293 KB

english, 2015

12

SPIE Proceedings [SPIE OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering - Los Angeles, CA (Sunday 17 January 1993)] Ultrahigh Resolution Radar - Bulk avalanche semiconductor switches (BASS) for high-resolution ultrawideband radar (UWBR) applications

Helava, Heikki I., Herman, Michael H., Leung, Charles S., Oicles, Jeffrey A., Ragle, Larry O., Wessman, Susan C., Falk, R. Aaron, Adams, Jeff C., Davis, Stephen J., Vickers, Roger S.

Année:

1993

Langue:

english

Fichier:

PDF, 260 KB

english, 1993

13

SPIE Proceedings [SPIE OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering - Los Angeles, CA (Sunday 17 January 1993)] Optically Activated Switching III - Lifetime of BASS devices on 50-ohm video pulser circuits

Herman, Michael H., Ahern, S. M., Ragle, Larry O., Leung, Charles S., Helava, Heikki I., Rossi, Dave M., Mansfield, D., Positeri, Kenneth M., Falk, R. Aaron

Année:

1993

Langue:

english

Fichier:

PDF, 684 KB

english, 1993

14

SPIE Proceedings [SPIE Boston - DL tentative - Boston, MA (Tuesday 25 September 1990)] Optically Activated Switching - High-power waveform generation using photoconductive switches

Oicles, Jeffrey A., Helava, Heikki I., Grant, Jon R., Ragle, Larry O., Wessman, Susan C., Zutavern, Fred J.

Année:

1991

Langue:

english

Fichier:

PDF, 261 KB

english, 1991

15

Efficiency of UVA LEDs grown by HVPE in relation with the active region thickness

Kurin, Sergey, Antipov, Andrey, Barash, Iosif, Roenkov, Alexander, Usikov, Alexander, Helava, Heikki, Makarov, Yuri, Solomonov, Alexander, Tarasov, Sergey, Evseenkov, Anton, Lamkin, Ivan

Journal:

Physica status solidi

Année:

2015

Langue:

english

Fichier:

PDF, 274 KB

english, 2015

16

Highly Sensitive NO2 Graphene Sensor Made on SiC Grown in Ta Crucible

Novikov, S., Makarov, Yu.N., Helava, Heikki, Lebedev, S., Lebedev, Andrey, Davydov, Valeri

Journal:

Materials Science Forum

Année:

2016

Langue:

english

Fichier:

PDF, 1.24 MB

english, 2016

17

Investigation of Direct Water Photoelectrolysis Process Using III-N Structures

Usikov, Alexander, Nikiforov, Alexey, Khait, Oleg, Medvedev, Oleg, Ermakov, Ivan, Papchenko, Boris, Puzyk, Mike, Antipov, Andrey, Barash, Iosif, Kurin, Sergey, Roenkov, Alexander, Helava, Heikki, Maka

Journal:

Materials Science Forum

Année:

2017

Langue:

english

Fichier:

PDF, 694 KB

english, 2017

18

Investigation of water splitting using III-N structures

Usikov, Alexander, Ermakov, Ivan, Helava, Heikki, Kurin, Sergey, Nikiforov, Alexey, Papchenko, Boris, Puzyk, Mike, Polyakov, Alexander, Lee, In-Hwan, Makarov, Yuri

Journal:

physica status solidi (b)

Année:

2017

Langue:

english

Fichier:

PDF, 671 KB

english, 2017

19

Photoelectrochemical Corrosion of GaN/AlGaN-Based p-n Structures

Usikov, Alexander, Helava, Heikki, Nikiforov, Alexey, Puzyk, Michael, Papchenko, Boris, Makarov, Yuri

Journal:

American Journal of Applied Sciences

Année:

2016

Langue:

english

Fichier:

PDF, 311 KB

english, 2016