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Design of photonic crystal cavities
The goal of this semester project is to design high-Q (quality factor) photonic crystal cavities made of h-BN and/or silicon nitride (SiN).
The need of on-chip photonics for information and communication technology drives the research on integrated optoelectronic devices. Two-dimensional (2D) materials are promising candidates for such applications [1], like light-emitting devices [2] and high-speed photodetectors [3] developed in the Photonics Laboratory. By integrating the optoelectronic device with 2D materials-based photonic structures (waveguides or optical cavities), the optical coupling between the active material and the dielectric photonic structure can be enhanced. Along this line, we recently demonstrated waveguide-coupled disk resonators made of hexagonal boron nitride (h-BN) [4] and 2D light-emitting devices integrated to h-BN waveguides [5].
The goal of this semester project is to design high-Q (quality factor) photonic crystal cavities
made of h-BN and/or silicon nitride (SiN). As a starting point of the project, reported results on
h-BN photonic cavity structures can be replicated by modelling [6]. The student will:
1) Determine design parameters of the photonic structures by simulations using commercial tools
such as COMSOL and Ansys Lumerical. The student will have the opportunity to: 2) Participate in
characterization of such photonic structures in an optical measurement setup as well as follow the
fabrication processes. The project will be conducted in close cooperation with fabrication of
designed structures, thereby directly contributing to a larger research effort of the team.
References:
[1] K. Mak, J. Shan, Nature Photon 10, 216-226 (2016)
[2] M. Parzefall et al., Nat. Commun. 10, 292 (2019)
[3] N. Flöry et al., Nat. Nanotechnol. 15, 118-124 (2020)
[4] R. Khelifa et al., Nano Letters 20, 6155-6161 (2020)
[5] R. Khelifa. S. Shan et al., ACS Photonics, 10, 5, 1328-1333 (2023)
[6] S. Kim et al., Nat. Commun. 9, 2623 (2018)
Prerequisites:
Good knowledge of and strong interest in optics, practical simulation skills, (practical
optical measurement skills).
The need of on-chip photonics for information and communication technology drives the research on integrated optoelectronic devices. Two-dimensional (2D) materials are promising candidates for such applications [1], like light-emitting devices [2] and high-speed photodetectors [3] developed in the Photonics Laboratory. By integrating the optoelectronic device with 2D materials-based photonic structures (waveguides or optical cavities), the optical coupling between the active material and the dielectric photonic structure can be enhanced. Along this line, we recently demonstrated waveguide-coupled disk resonators made of hexagonal boron nitride (h-BN) [4] and 2D light-emitting devices integrated to h-BN waveguides [5]. The goal of this semester project is to design high-Q (quality factor) photonic crystal cavities made of h-BN and/or silicon nitride (SiN). As a starting point of the project, reported results on h-BN photonic cavity structures can be replicated by modelling [6]. The student will: 1) Determine design parameters of the photonic structures by simulations using commercial tools such as COMSOL and Ansys Lumerical. The student will have the opportunity to: 2) Participate in characterization of such photonic structures in an optical measurement setup as well as follow the fabrication processes. The project will be conducted in close cooperation with fabrication of designed structures, thereby directly contributing to a larger research effort of the team.
References: [1] K. Mak, J. Shan, Nature Photon 10, 216-226 (2016) [2] M. Parzefall et al., Nat. Commun. 10, 292 (2019) [3] N. Flöry et al., Nat. Nanotechnol. 15, 118-124 (2020) [4] R. Khelifa et al., Nano Letters 20, 6155-6161 (2020) [5] R. Khelifa. S. Shan et al., ACS Photonics, 10, 5, 1328-1333 (2023) [6] S. Kim et al., Nat. Commun. 9, 2623 (2018)
Prerequisites: Good knowledge of and strong interest in optics, practical simulation skills, (practical optical measurement skills).
Not specified
Supervisor: Antti Moilanen (amoilanen@ethz.ch), Shengyu Shan (shshan@student.ethz.ch).
Supervisor: Antti Moilanen (amoilanen@ethz.ch), Shengyu Shan (shshan@student.ethz.ch).