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Jukka Tulkki
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Journal Articles

On the correlation of the Auger generated hot electron emission and efficiency droop in III-N light-emitting diodes

Toufik Sadi, Pyry Kivisaari, Jani Oksanen, Jukka Tulkki
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 091106 (2014)
https://doi.org/10.1063/1.4894862
Published: September 2014
View article titled, On the correlation of the Auger generated hot electron emission and efficiency droop in III-N light-emitting diodes
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Journal Articles

Yield and leakage currents of large area lattice matched InP/InGaAs heterostructures

Anders Olsson, Abuduwayiti Aierken, Henri Jussila, Jan Bauer, Jani Oksanen, Otwin Breitenstein, Harri Lipsanen, Jukka Tulkki
Journal: Journal of Applied Physics
J. Appl. Phys. 116, 083105 (2014)
https://doi.org/10.1063/1.4894005
Published: August 2014
View article titled, Yield and leakage currents of large area lattice matched InP/InGaAs heterostructures
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Journal Articles

A fluctuational electrodynamics model for the optimization of light-extraction efficiency in thin-film light-emitting diodes

Oskari Heikkilä, Jani Oksanen, Jukka Tulkki
Journal: Journal of Applied Physics
J. Appl. Phys. 114, 223108 (2013)
https://doi.org/10.1063/1.4843656
Published: December 2013
View article titled, A fluctuational electrodynamics model for the optimization of light-extraction efficiency in thin-film light-emitting diodes
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Journal Articles

Effect of plasmonic losses on light emission enhancement in quantum-wells coupled to metallic gratings

Toufik Sadi, Jani Oksanen, Jukka Tulkki
Journal: Journal of Applied Physics
J. Appl. Phys. 114, 223104 (2013)
https://doi.org/10.1063/1.4845875
Published: December 2013
View article titled, Effect of plasmonic losses on light emission enhancement in quantum-wells coupled to metallic gratings
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Journal Articles

Polarization doping and the efficiency of III-nitride optoelectronic devices

Pyry Kivisaari, Jani Oksanen, Jukka Tulkki
Journal: Applied Physics Letters
Appl. Phys. Lett. 103, 211118 (2013)
https://doi.org/10.1063/1.4833155
Published: November 2013
View article titled, Polarization doping and the efficiency of III-nitride optoelectronic devices
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Journal Articles

Current injection to free-standing III-N nanowires by bipolar diffusion

Pyry Kivisaari, Jani Oksanen, Jukka Tulkki
Journal: Applied Physics Letters
Appl. Phys. Lett. 103, 031103 (2013)
https://doi.org/10.1063/1.4813754
Published: July 2013
View article titled, Current injection to free-standing III-N nanowires by bipolar diffusion
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Journal Articles

Influence of internal absorption and interference on the optical efficiency of thin-film GaN-InGaN light-emitting diodes

Oskari Heikkilä, Jani Oksanen, Jukka Tulkki
Journal: Applied Physics Letters
Appl. Phys. Lett. 102, 111111 (2013)
https://doi.org/10.1063/1.4798326
Published: March 2013
View article titled, Influence of internal absorption and interference on the optical efficiency of thin-film GaN-InGaN light-emitting diodes
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Journal Articles

Temperature dependence of droop onset in optically pumped intrinsic InGaAs/InP heterostructures

Anders Olsson, Abuduwayiti Aierken, Jani Oksanen, Sami Suihkonen, Harri Lipsanen, Jukka Tulkki
Journal: Applied Physics Letters
Appl. Phys. Lett. 102, 081123 (2013)
https://doi.org/10.1063/1.4794404
Published: March 2013
View article titled, Temperature dependence of droop onset in optically pumped intrinsic InGaAs/InP heterostructures
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Journal Articles

Electrical measurement of internal quantum efficiency and extraction efficiency of III-N light-emitting diodes

Pyry Kivisaari, Lauri Riuttanen, Jani Oksanen, Sami Suihkonen, Muhammad Ali, Harri Lipsanen, Jukka Tulkki
Journal: Applied Physics Letters
Appl. Phys. Lett. 101, 021113 (2012)
https://doi.org/10.1063/1.4736565
Published: July 2012
View article titled, Electrical measurement of internal quantum efficiency and extraction efficiency of III-N light-emitting diodes
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Journal Articles

Effects of lateral current injection in GaN multi-quantum well light-emitting diodes

Pyry Kivisaari, Jani Oksanen, Jukka Tulkki
Journal: Journal of Applied Physics
J. Appl. Phys. 111, 103120 (2012)
https://doi.org/10.1063/1.4720584
Published: May 2012
View article titled, Effects of lateral current injection in GaN multi-quantum well light-emitting diodes
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Journal Articles

Light extraction limits in textured GaN-InGaN light-emitting diodes: Radiative transfer analysis

Oskari Heikkilä, Jani Oksanen, Jukka Tulkki
Journal: Applied Physics Letters
Appl. Phys. Lett. 99, 161110 (2011)
https://doi.org/10.1063/1.3655155
Published: October 2011
View article titled, Light extraction limits in textured GaN-InGaN light-emitting diodes: Radiative transfer analysis
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Journal Articles

Drooping as a simple characterization tool for extraction efficiency and optical losses in light emitting diodes

Jani Oksanen, Jukka Tulkki
Journal: Applied Physics Letters
Appl. Phys. Lett. 97, 131105 (2010)
https://doi.org/10.1063/1.3494085
Published: September 2010
View article titled, Drooping as a simple characterization tool for extraction efficiency and optical losses in light emitting diodes
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Journal Articles

Thermophotonic heat pump—a theoretical model and numerical simulations

Jani Oksanen, Jukka Tulkki
Journal: Journal of Applied Physics
J. Appl. Phys. 107, 093106 (2010)
https://doi.org/10.1063/1.3419716
Published: May 2010
View article titled, Thermophotonic heat pump—a theoretical model and numerical simulations
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Journal Articles

The challenge of unity wall plug efficiency: The effects of internal heating on the efficiency of light emitting diodes

Oskari Heikkilä, Jani Oksanen, Jukka Tulkki
Journal: Journal of Applied Physics
J. Appl. Phys. 107, 033105 (2010)
https://doi.org/10.1063/1.3285431
Published: February 2010
View article titled, The challenge of unity wall plug efficiency: The effects of internal heating on the efficiency of light emitting diodes
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Journal Articles

Ultimate limit and temperature dependency of light-emitting diode efficiency

Oskari Heikkilä, Jani Oksanen, Jukka Tulkki
Journal: Journal of Applied Physics
J. Appl. Phys. 105, 093119 (2009)
https://doi.org/10.1063/1.3125514
Published: May 2009
View article titled, Ultimate limit and temperature dependency of light-emitting diode efficiency
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Journal Articles

Cooling of radiative quantum dot excitons by THz‐radiation

Fredrik Boxberg, Jukka Tulkki, Go Yusa, Hiroyuki Sakaki
Journal: AIP Conference Proceedings
AIP Conf. Proc. 893, 999–1000 (2007)
https://doi.org/10.1063/1.2730232
Published: April 2007
View article titled, Cooling of radiative quantum dot excitons by THz‐radiation
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Journal Articles

Polarization of gain and symmetry breaking by interband coupling in quantum well lasers

Fredrik Boxberg, Roman Tereshonkov, Jukka Tulkki
Journal: Journal of Applied Physics
J. Appl. Phys. 100, 063108 (2006)
https://doi.org/10.1063/1.2353276
Published: September 2006
View article titled, Polarization of gain and symmetry breaking by interband coupling in quantum well lasers
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Journal Articles

Doubling of conductance steps in Si ∕ Si O 2 quantum point contact

Fredrik Boxberg, Teppo Häyrynen, Jukka Tulkki
Journal: Journal of Applied Physics
J. Appl. Phys. 100, 024904 (2006)
https://doi.org/10.1063/1.2214212
Published: July 2006
View article titled, Doubling of conductance steps in Si ∕ Si O 2 quantum point contact
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Journal Articles

Fast coherent all-optical flip-flop memory

Jani Oksanen, Jukka Tulkki
Journal: Applied Physics Letters
Appl. Phys. Lett. 88, 181118 (2006)
https://doi.org/10.1063/1.2199971
Published: May 2006
View article titled, Fast coherent all-optical flip-flop memory
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Journal Articles

The Polarization‐dependence of the Gain in Quantum Well Lasers

Fredrik Boxberg, Roman Tereshonkov, Jukka Tulkki
Journal: AIP Conference Proceedings
AIP Conf. Proc. 772, 1563–1564 (2005)
https://doi.org/10.1063/1.1994714
Published: June 2005
View article titled, The Polarization‐dependence of the Gain in Quantum Well Lasers
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