Mode couplings of a semiconductor nanowire scanning across a photonic crystal nanocavity

Qingchen Yuan; Liang Fang; Qiang Zhao; Yadong Wang; Bo Mao; Vladislav Khayrudinov; Harri Lipsanen; Zhipei Sun; Jianlin Zhao; Xuetao Gan

doi:10.3788/COL201917.062301

Journals >Chinese Optics Letters >Volume 17 >Issue 6 >Page 062301 > Article

Chinese Optics Letters
Vol. 17, Issue 6, 062301 (2019)

Mode couplings of a semiconductor nanowire scanning across a photonic crystal nanocavity | Editors' Pick

Qingchen Yuan¹, Liang Fang¹, Qiang Zhao², Yadong Wang¹, Bo Mao¹, Vladislav Khayrudinov³, Harri Lipsanen³, Zhipei Sun^3、4, Jianlin Zhao^1、*, and Xuetao Gan^1、**

Author Affiliations

¹MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072, China

²Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China

³Department of Electronics and Nanoengineering, Aalto University, Espoo, FI-00076, Finland

⁴QTF Centre of Excellence, Department of Applied Physics, Aalto University, Espoo, FI-00076, Finland

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DOI: 10.3788/COL201917.062301 Cite this Article Set citation alerts

Qingchen Yuan, Liang Fang, Qiang Zhao, Yadong Wang, Bo Mao, Vladislav Khayrudinov, Harri Lipsanen, Zhipei Sun, Jianlin Zhao, Xuetao Gan. Mode couplings of a semiconductor nanowire scanning across a photonic crystal nanocavity[J]. Chinese Optics Letters, 2019, 17(6): 062301 Copy Citation Text

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Abstract

The position-dependent mode couplings between a semiconductor nanowire (NW) and a planar photonic crystal (PPC) nanocavity are studied. By scanning an NW across a PPC nanocavity along the hexagonal lattice’s Γ – M and M – K directions, the variations of resonant wavelengths, quality factors, and mode volumes in both fundamental and second-order resonant modes are calculated, implying optimal configurations for strong mode-NW couplings and light-NW interactions. For the fundamental (second-order) resonant mode, scanning an NW along the M – K (Γ – M) direction is preferred, which supports stronger light-NW interactions with larger NW-position tolerances and higher quality factors simultaneously. The simulation results are confirmed experimentally with good agreements.