Details

Autor(en) / Beteiligte

• Montesinos-Ballester, Miguel
• Vakarin, Vladyslav
• Ramirez, Joan Manel
• Liu, Qiankun
• Alonso-Ramos, Carlos
• Le Roux, Xavier
• Frigerio, Jacopo
• Ballabio, Andrea
• Barzaghi, Andrea
• Deniel, Lucas
• Bouville, David
• Vivien, Laurent
• Isella, Giovanni
• Marris-Morini, Delphine

Titel

Optical modulation in Ge-rich SiGe waveguides in the mid-infrared wavelength range up to 11 µm

Ist Teil von

• Communications materials, 2020-12, Vol.1 (1), p.1-6, Article 6

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Waveguide integrated optical modulators in the mid-infrared wavelength range are of significant interest for molecular spectroscopy. This is because on-chip synchronous detection can improve the performance of detection systems and can also be used for free-space communications where optical modulators working in atmospheric transparency windows are needed. Here we report optical modulation in a mid-infrared photonic circuit, reaching wavelengths larger than 8 µm. Optical modulation in the wavelength range from 5.5 to 11 µm is shown, relying on a broadband Ge-rich graded-SiGe platform. This demonstration experimentally confirms the free-carrier absorption effect modeling. These results pave the way towards efficient high-performance electrically-driven integrated optical modulators in the mid-infrared wavelength range. Mid-infrared optical modulators are important for detecting compounds in a wide range of applications, but are typically limited to short wavelengths. Now, a SiGe waveguide is used to fabricate an optical modulator that can reach wavelengths spanning 5.5 µm to 11 µm.