Welcome to Kawakami Laboratory

Welcome to the Homepage
of Kawakami Laboratory! In our laboratory, we research the interaction between light and matter. We try to elucidate and possibly discover physics involved in the
light-matter interaction processes.
We promote such studies to realize cutting-edge optical devices and applications that dramatically enrich human activities.

News

The paper published in AIP Advances entitled,
"Screw dislocation-induced growth spirals as emissive exciton localization centers in Al-rich AlGaN/AlN quantum wells",
AIP Advances, Vol. 5, No. 11, 117115 (2015).
is selected as the Editor's Picks of this journal.

The paper published in Applied Physics Express entitled,
"InGaN-based visible light-emitting diodes on ScAlMgO₄ (0001) substrates",
Applied Physics Express Vol. 8, No. 6, 062101 (2015).
is selected as the Spotlights of this journal.

The paper published in Applied Physics Express entitled,
"Remarkably Suppressed Luminescence Inhomogeneity in a (0001) InGaN Green Laser Structure",
Applied Physics Express Vol. 6, No. 11, 111002 (2013).
is selected as the Editors' Choice of the journal.

The paper presented in CLEO-PR&OECC/PS 2013 entitled,
"Local Photoluminescence Properties of InGaN Green Laser Structure on (0001) GaN Substrate"
is selected as the Best Paper Awards of the conference.

Invited presentation

Prof. M. Funato
International Workshop on Nitride Semiconductors (Berlin, Germany, October 9-14, 2022), Invited
"Fabrication and optical properties of ultra-thin GaN/AlN quantum wells for far-UVC emitters"
Mitsuru Funato and Yoichi Kawakami

Prof. M. Funato
The Laser Display and Lighting Conference (Hybrid, April 19-22, 2022), Invited
"Strategy for higher red emission efficiency based on InGaN lattice matched to ScAlMgO₄ substrates"
Mitsuru Funato and Yoichi Kawakami

Prof. M. Funato
SPIE PHOTONICS WEST (San Francisco, Jan. 22-27, 2022), Invited
"Polar-plane-free faceted InGaN polychromatic emitters with fast carrier recombination processes"
Mitsuru Funato, Yoshinobu Matsuda, and Yoichi Kawakami

Dr. R. Ishii
SPIE PHOTONICS WEST (San Francisco, Jan. 22-27, 2022), Invited
"Luminescence spectroscopies on 265-nm AlGaN DUV LEDs and AlN films grown on AlN substrates"
Ryota Ishii, Mitsuru Funato, and Yoichi Kawakami

Dr. R. Ishii
IWSingularity (Nagoya Congress Center, Jan. 11-13, 2022), Invited
"Temperature-dependent electroluminescence spectroscopy on 265-nm AlGaN-based LEDs grown on AlN substrates"
Ryota Ishii, Akira Yoshikawa, Mitsuru Funato, and Yoichi Kawakami

Prof. M. Funato
SPIE PHOTONICS WEST (Online, Mar. 6-11, 2021), Invited
"Ultrathin GaN/AlN quantum wells for deep UV emitters"
Mitsuru Funato and Yoichi Kawakami

Dr. R. Ishii
SPIE PHOTONICS WEST (Online, Mar. 6-11, 2021), Invited
"Recent progress in deep-ultraviolet scanning near-field optical microscope: a tool visualizing the luminescence properties of Al-rich AlGaN active layers"
Ryota Ishii, Mitsuru Funato, and Yoichi Kawakami

Dr. T. Ozaki
SPIE PHOTONICS WEST (San Francisco, United States, Feb. 1-6, 2020), Invited
"InGaN-based quantum wells on ScAlMgO₄ substrates toward long wavelength emitters "
Takuya Ozaki, Mitsuru Funato, and Yoichi Kawakami

Dr. R. Ishii
SPIE PHOTONICS WEST (San Francisco, United States, Feb. 1-6, 2020), Invited
"Exciton fine structure of aluminum nitride"
Ryota Ishii, Mitsuru Funato, and Yoichi Kawakami

Prof. Y. Kawakami
TVS-2019 Workshop (National Chiao Tung Univ., Hsinchu, Taiwan, Nov. 1, 2019), Invited
"Tailor-made LEDs with nitride-based 3D-structures"
Yoichi Kawakami and Mitsuru Funato

Prof. M. Funato
SemiconNano2019 (Kobe, Japan, Sep. 24-27, 2019), Invited
"GaN/AlN Ultrathin Quantum Wells for UV Emitters"
Mitsuru Funato and Yoichi Kawakami

Dr. R. Ishii
International Workshop on Nitride Semiconductors 2018 (Kanazawa, Japan, Nov. 11-16, 2018), Invited
"Development of a deep-ultraviolet scanning nearfield optical microscope for nano-spectroscopic characterizations of Al_xGa_1-xN (x: 0∼1) active layers"
Ryota Ishii, Mitsuru Funato, and Yoichi Kawakami

Prof. M. Funato
SPIE Optics + Photonics 2018 (San Diego, USA, Aug. 19-23, 2018), Invited
"Control of carrier recombination processes in AlGaN-based UV emitters"
Mitsuru Funato and Yoichi Kawakami

Prof. Y. Kawakami
16th International Symposium on the Science and Technology of Lighting (University of Sheffield, Sheffield, UK, June 17-22, 2018), Plenary
"TBA"

Prof. Y. Kawakami
IWUMD 2017 (Fukuoka, Japan, Nov. 14-18, 2017), Invited
"Clarifying carrier recombination processes in AlGaN-based materials towards efficient DUV emitters"
Yoichi Kawakami

Prof. M. Funato
IWBNS-X (Nuuksio National Park, Espoo, Finland, Sep. 18-22, 2017), Invited
"An environmentally friendly method to grow AlN thick layers"
Mitsuru Funato and Yoichi Kawakami

Prof. M. Funato
ICDS-29 (Kunibiki Messe, Matsue, Japan, July 31-Aug 4, 2017), Invited
"Impact of point defects on the optical transition processes in AlN-based semiconductors"
Mitsuru Funato and Yoichi Kawakami

Prof. Y. Kawakami
ICNS 12 (Strasbourg Convention Center, Strasbourg, France, July 24-28, 2017), Invited
"Impact of InGaN epitaxy lattice matched to ScAlMgO₄ substrates on future photonic devices"
Yoichi Kawakami

Dr. R. Ishii
ISPESE 2017 (Kyoto University, Japan, March 10, 2017), Invited
"Optical properties of excitons in widegap semiconductors"
Ryota Ishii, Mitsuru Funato, and Yoichi Kawakami

Prof. M. Funato
SPIE Photonics West ((The Moscone Center, San Francisco, United States, January 28 - February 2, 2017), Invited
"Design of Al-rich AlGaN quantum-well structures for efficient UV emitters"
Mitsuru Funato and Yoichi Kawakami

Prof. Y. Kawakami
IWN-2016 (Hilton Orlando Lake Buena Vista, Orlando, United States, October 2-7, 2016), Invited
"Radiative and Nonradiative Recombination Processes in AlGaN-Based Quantum Wells"
Yoichi Kawakami

Prof. M. Funato
IWUMD-2016 (Peking University, Beijing, China, July 27-31, 2016), Invited
"Unveiling the carrier recombination paths in high Al content AlGaN quantum wells"
Mitsuru Funato and Yoichi Kawakami

Prof. Y. Kawakami
ISPlasma2016 (Nagoya University, Nagoya, Japan, 6-10 March 2016), Invited
"Assessment and control of recombination dynamics in nitride-based semiconductors for tailor-made solid state lighting"
Yoichi Kawakami

Mr. S. Ichikawa
SPIE Photonics West 2016 (The Moscone Center San Francisco, California, United States, 13-18 February 2016), Invited
"Approaches to highly efficient UV emitters based on AlGaN quantum wells"
Shuhei Ichikawa, Mitsuru Funato, and Yoichi Kawakami

Prof. M. Funato
2015 MRS Fall Meetings & Exhibits Syposium RR: Wide-Bandgap Materials for Energy Efficiency - Power Electronics and Solid-State Lighting (Boston, Massachusetts, November 29 - December 4, 2015), Invited Speakers
"Radiative and nonradiative recombination processes in AlN-based deep ultraviolet emitters"

Prof. M. Funato
2015 MRS Fall Meetings & Exhibits Tutorial RR: Introduction to Wide-Bandgap Materials for Power Electronics and Solid State Lighting (Boston, Massachusetts, November 29 - December 4, 2015), Instructors
"III-N Materials for Optoelectronics"

Prof. Y. Kawakami
The 11th International Conference on Nitride Semiconductors (Beijing, China, August 30- September 4, 2015), Invited Speakers
"Control of radiative recombination rate and polarization degree in nitride-based semiconductors"
Yoichi Kawakami

Prof. Y. Kawakami
The 7th Asia-Pacific Workshop on Widegap Semiconductors (The K Seoul Hotel, Korea, May 17-20, 2015), Plenary Speakers
"Recombination Dynamics in Nitride Semiconductors"
Yoichi Kawakami

Prof. M. Funato
the DPG conference in Berlin (Technische Universität Berlin, Germany, 15-20 March 2015), Invited
"Impact of reduced polarization fields on the optical properties of semipolar nitride quantum wells"
Mitsuru Funato and Yoichi Kawakami

Prof. M. Funato
SPIE Photonics West 2015 (The Moscone Center San Francisco, California, United States, 7-12 February 2015), Invited
"Semi/non-polar nitride quantum wells for high-efficient light emitters"
Mitsuru Funato and Yoichi Kawakami

Prof. Y. Kawakami
The 14th International Symposium on the Science and Technology of Lighting (LS14) (Spazio Como, Come Lake, June 22-27 2014),
"Monolithic integration of multi-colors in InGaN-based LEDs with three dimensional microfacet structures for the next generation lighting"
Yoichi Kawakami and Mitsuru Funato

Prof. M. Funato
5th International Symposium on Growth of III-Nitrides (ISGN5) (The Westin, Peachtree Plaza, Atlanta, Georgia, USA, May 18-22, 2014),
"Optical Properties of AlGaN/AlN QWs for Application to UV Emitters"
Yoichi Kawakami and Mitsuru Funato

Prof. Y. Kawakami
International Workshop on Luminescent Materials 2013 (LumiMat'13) (Shiran-Kaikan(Annex), Kyoto University, Kyoto, Japan, November 14-15, 2013),
"Impact of crystal orientation on InGaN-based efficient visible light emitters"

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2015.01.01: The Homepage is renewed.

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Kawakami Laboratory Department of Electronic Science and EngineeringFaculty of Engineering, Kyoto University

Kawakami Laboratory
Department of Electronic Science and Engineering
Faculty of Engineering, Kyoto University