1. Mid‐infrared suspended waveguide platform and building blocks
- Author
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Pavel Cheben, Zhibo Qu, Yolanda Xu Cheng, Alejandro Ortega-Moñux, Faysal El Mokhtari Mimun, Jordi Soler Penades, Ali Z. Khokhar, Wei Cao, Callum G. Littlejohns, Milos Nedeljkovic, Goran Z. Mashanovich, Robert Halir, Ahmed Osman, Íñigo Molina-Fernández, Alejandro Sánchez-Postigo, Juan Gonzalo Wanguemert-Perez, [Sanchez-Postigo, Alejandro] Univ Malaga, ETSI Telecomunicac, Dept Ingn Comunicac, E-29071 Malaga, Spain, [Wanguemert-Perez, Juan Gonzalo] Univ Malaga, ETSI Telecomunicac, Dept Ingn Comunicac, E-29071 Malaga, Spain, [Ortega-Monux, Alejandro] Univ Malaga, ETSI Telecomunicac, Dept Ingn Comunicac, E-29071 Malaga, Spain, [Halir, Robert] Univ Malaga, ETSI Telecomunicac, Dept Ingn Comunicac, E-29071 Malaga, Spain, [Mimun, Faysal El Mokhtari] Univ Malaga, ETSI Telecomunicac, Dept Ingn Comunicac, E-29071 Malaga, Spain, [Molina-Fernandez, Inigo] Univ Malaga, ETSI Telecomunicac, Dept Ingn Comunicac, E-29071 Malaga, Spain, [Penades, Jordi Soler] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England, [Nedeljkovic, Milos] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England, [Cheng, Yolanda Xu] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England, [Qu, Zhibo] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England, [Khokhar, Ali Z.] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England, [Osman, Ahmed] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England, [Cao, Wei] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England, [Littlejohns, Callum G.] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England, [Mashanovich, Goran Z.] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England, [Halir, Robert] Bionand Ctr Nanomed & Biotechnol, Parque Tecnol Andalucia, Malaga 29590, Spain, [Molina-Fernandez, Inigo] Bionand Ctr Nanomed & Biotechnol, Parque Tecnol Andalucia, Malaga 29590, Spain, [Cheben, Pavel] Natl Res Council Canada, Bldg M-50, Ottawa, ON K1A 0R6, Canada, Spanish Ministerio de Economia y Competitividad, Programa Estatal de Investigacion, Desarrollo e Innovacion Orientada a los Retos de la Sociedad (FEDER), Spanish Ministerio de Educacion, Cultura y Deporte, Universidad de Malaga, and EPSRC
- Subjects
Optical devices ,Silicon ,Óptica integrada ,Fabrication ,Materials science ,chemistry.chemical_element ,Waveguide (optics) ,law.invention ,Photonic metamaterial ,law ,Devices ,Grating coupler ,Electrical and Electronic Engineering ,Mid-infrared ,Subwavelength structures ,business.industry ,Metamaterial ,Integrated optics ,Cladding (fiber optics) ,Atomic and Molecular Physics, and Optics ,Wavelength ,Photonics ,chemistry ,Optoelectronics ,Photolithography ,business ,Principles ,Waveguides - Abstract
In this work, the authors present their recent progress in the development of a platform for the mid-infrared wavelength range, based on suspended silicon waveguides with subwavelength metamaterial cladding. The platform has some intrinsic advantages, which make it a very promising candidate for sensing applications in the molecular fingerprint region. Specifically, it can cover the full transparency window of silicon (up to a wavelength of 8 μm), only requires one lithographic etch-step and can be designed for strong light-matter interaction. Design rules, practical aspects of the fabrication process and experimental results of a complete set of elemental building blocks operating at two very different wavelengths, 3.8 and 7.7 μm, are discussed. Propagation losses as low as 0.82 dB/cm at λ0 = 3.8 μm and 3.1 dB/cm at λ0 = 7.7 μm are attained for the interconnecting waveguides.
- Published
- 2019