Search Results - "Tommila, Juha"

Moth-eye antireflection coating fabricated by nanoimprint lithography on 1 eV dilute nitride solar cell by Tommila, Juha, Aho, Arto, Tukiainen, Antti, Polojärvi, Ville, Salmi, Joel, Niemi, Tapio, Guina, Mircea

“…ABSTRACT We report on the performance of biomimicked antireflection coating applied to dilute nitride solar cell. The coating consists of nanostructures…”
Get full text

Applications of UV-nanoimprint soft stamps in fabrication of single-frequency diode lasers by Viheriälä, Jukka, Tommila, Juha, Leinonen, Tomi, Dumitrescu, Mihail, Toikkanen, Lauri, Niemi, Tapio, Pessa, Markus

“…We show how to use a modified poly-dimethyl-siloxane (PDMS) soft stamp to reduce pattern deformation and residual layer thickness in soft UV-nanoimprint…”
Get full text

Moth-eye antireflection coating fabricated by nanoimprint lithography on 1eV dilute nitride solar cell by Tommila, Juha, Aho, Arto, Tukiainen, Antti, Polojärvi, Ville, Salmi, Joel, Niemi, Tapio, Guina, Mircea

“…We report on the performance of biomimicked antireflection coating applied to dilute nitride solar cell. The coating consists of nanostructures replicating the…”
Get full text

Arrays of metallic nanocones fabricated by UV-nanoimprint lithography by Kontio, Juha M., Simonen, Janne, Tommila, Juha, Pessa, Markus

“…We introduce a novel method for fabricating nanocones of various metals. Based on a combination of UV-nanoimprint lithography and electron beam evaporation,…”
Get full text

Ultrasmall microdisk and microring lasers based on InAs/InGaAs/GaAs quantum dots by Maximov, Mikhail V, Kryzhanovskaya, Natalia V, Nadtochiy, Alexey M, Moiseev, Eduard I, Shostak, Ivan I, Bogdanov, Andrey A, Sadrieva, Zarina F, Zhukov, Alexey E, Lipovskii, Andrey A, Karpov, Denis V, Laukkanen, Janne, Tommila, Juha

“…Ultrasmall microring and microdisk lasers with an asymmetric air/GaAs/Al 0.98 Ga 0.02 As waveguide and an active region based on InAs/InGaAs/GaAs quantum dots…”
Get full text

The Role of Groove Periodicity in the Formation of Site-Controlled Quantum Dot Chains by Schramm, Andreas, Hakkarainen, Teemu V, Tommila, Juha, Guina, Mircea

“…Structural and optical properties of InAs quantum dot (QD) chains formed in etched GaAs grooves having different periods from 200 to 2000 nm in [010]…”
Get full text

Site-controlled InAs quantum dot chains coupled to surface plasmons by Hakkarainen, Teemu, Tommila, Juha, Schramm, Andreas, Simonen, Janne, Niemi, Tapio, Strelow, Christian, Kipp, Tobias, Kontio, Juha, Guina, Mircea

Get full text

The influence of temperature on the photoluminescence properties of single InAs quantum dots grown on patterned GaAs by Tommila, Juha, Strelow, Christian, Schramm, Andreas, Hakkarainen, Teemu V, Dumitrescu, Mihail, Kipp, Tobias, Guina, Mircea

“…We report the temperature-dependent photoluminescence of single site-controlled and self-assembled InAs quantum dots. We have used nanoimprint lithography for…”
Get full text

Laterally-corrugated ridge-waveguide distributed feedback lasers at 980 nm by Laakso, Antti, Dumitrescu, Mihail, Viheriälä, Jukka, Telkkälä, Jarkko, Tommila, Juha, Haring, Kimmo, Leinonen, Tomi, Ranta, Sanna, Pessa, Markus

“…The paper presents a simulation-based analysis of laterally-corrugated ridge-waveguide distributed feedback semiconductor lasers emitting at 980 nm. The…”
Get full text

Selective area heteroepitaxy of InP nanopyramidal frusta on Si for nanophotonics by Metaferia, W., Tommila, J., Kataria, H., Junesand, C., Yanting Sun, Guina, M., Niemi, T., Lourdudoss, S.

“…InP nanopyramidal frusta on InP and InP precoated Si substrates were grown selectively from nano-imprinted circular openings in silicon dioxide mask using a…”
Get full text

Longitudinally single mode laser-diode fabricated with Nanoimprint Lithography by Viheriala, J., Tommila, J., Rytkonen, T., Toikkanen, L., Dumitrescu, M., Niemi, T., Pessa, M.

“…We demonstrate diode lasers with integrated feedback gratings using nanoimprint lithography. Our process is developed for epitaxially grown semiconductors. Due…”
Get full text

Laterally-corrugated ridge-waveguide distributed feedback lasers at 980 nm by Laakso, A., Viheriala, J., Dumitrescu, M., Tommila, J., Haring, K., Leinonen, T., Ranta, S., Pessa, M.

“…The paper presents simulation results for laterally-corrugated ridge-waveguide distributed-feedback (DFB) semiconductor lasers emitting at 980 nm, along with…”
Get full text