Nanophotonic Devices Group

The Nanophotonic Devices group designs, fabricates, and characterizes semiconductor optical devices such as new lasers, waveguide devices or sensors for various applications.

We work on quite a range of topics from advanced passive devices for frequency and spatial domain light manipulation to complex integrated optoelectronic components with tailored material responses to allow light emission and light control also directly in the temporal domain.

We use the best in class materials for the various topics, i.e. silicon and III-V semiconductors (InP, GaAs and GaN)

Besides advanced device concepts a main focus area is understanding and perfecting cleanroom processes to allow engineering at the nanoscale.

Please find more information in the menu to the left.

Group Leader: Kresten Yvind

Picture of the Month

Misalignment between the active material region and the cavity, as evident from the cross-sectional scanning electron microscope image of the buried heterostructure photonic crystal membrane laser. The active material (3 layers of InGaAsP/AlInGaAs quantum wells) were selectively removed for clarity. Read more about the project.

For previous "Picture of the Month" winners, Visit link.

MOVPE program and mask layout

Design

Design of devices: Optical, electrical and mechanical simulations, mask design, epitaxial design.
Yellow room

Fabrication

All our research projects have an element of synthesis, i.e. typically fabrication activities in the Danchip cleanroom. The group is running the MOVPE system and has extensive knowledge within e-beam lithography, dry etching and complex electro-optic  device geometries.
Probing station

Characterization

We characterize both materials and devices using a number of test stations. Setup for planar devices, edge-emitting lasers, VCSELs, mode-locked lasers and micro-PL have been built.

News Update

August 2017
Dr. Minhao Pu will give an invited talk at the Asia Communications and Photonics Conference (ACP 2017) which will take place in Guangzhou, China during the period 10th to 13th November 2017.
In his talk “An ultra-efficient nonlinear integrated platform for optical signal generation and processing”, he will review the recent progress in the nonlinear AlGaAs-on-insulator platform.

July 2017
Congratulations to Mohammad Esmail Aryaee Panah for successfully defending his thesis on Design and fabrication of mid-infrared plasmonic materials based on highly doped III-V semiconductors.

June 2017
Paper Published: Panah, Mohammad Esmail Aryaee; Semenova, Elizaveta; Lavrinenko, Andrei / Enhancing Optical Forces in InP-Based Waveguides.
Paper Published:Panah, Mohammad Esmail Aryaee; Han, Li; Norrman, Kion; Pryds, Nini; Nadtochiy, A.; Zhukov, A. E.; Lavrinenko, Andrei; Semenova, Elizaveta/ Mid-IR optical properties of silicon doped InP.

May 2017
Lars and Xiaowei have received a grant from the Danish Council for Independent Research | Technology and Production (DFF-FTP) and title of the project is “Athermal Silicon Waveguide Platform for Temperature-Insensitive Photonic Integration”. Collaborating with Zhejiang University in China and Odense University Hospital in Denmark, this two-years grant is aiming to resolve the thermal drift problem of on-chip silicon photonic devices for optical communications as well as for optical biosensors.

November 2016
The Nanophotonic Device group was part of the team winning the Horizon2020 prize for “Breaking the optical transmission barrier”. An AlGaAs nanowire was use to increase the bandwidth in an energy efficient way. Link

September 2016
Editor of Science has highlighted the our research result on AlGaAs frequency comb which was published in Optica (Optica 3, 823 (2016)).Link

August 2016
AlGaAs on Insulator paper out
: Minhao Pu, Luisa Ottaviano, Elizaveta Semenova, Kresten Yvind, "Efficient frequency comb generation in AlGaAs-on-insulator," Optica 3, 823-826 (2016); Link

May 2016
AlGaAs on Insulator invited talks at IPR, PIERS 2016 and Photonics West 2017: Minhao Pu and Kresten Yvind will present the latest results on the new superefficient nonlinear photonics platform.

April 2016
Ole Sigund, Jakob S. Jensen & Lars H. Frandsen write letter to Nature Photonics questioning the rationale behind the competition for a small device footprint and also point out a lack of appropriate historical context in the three Nature Photonics contributions. See More.