Open AccessMode tailoring in subwavelength-dimensional semiconductor micro/nanowaveguides by coupling optical microfibers
Author(s) -
Fuxing Gu,
Hongbin Cui,
Liang Feng,
Xing Lin,
Haifeng Wang,
Heping Zeng
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.023361
Subject(s) - microfiber , materials science , optics , semiconductor , optoelectronics , fresnel equations , extinction ratio , reflection (computer programming) , interference (communication) , total internal reflection , coupling (piping) , wavelength , refractive index , channel (broadcasting) , physics , computer science , metallurgy , composite material , programming language , electrical engineering , engineering
Benefitted from large fraction of evanescent wave and high endface reflectivity, we have realized mode tailoring in subwavelength-dimensional semiconductor micro/nanowaveguides (MN-WGs) by coupling optical silica microfibers. By investigating the reflection spectra, it was found that the microfiber tips could offer effective reflection and can been used to continuously and reversibly tune the interference wavelengths by changing the contact points with the MN-WGs. The measured extinction ratio in the interference patterns was as high as ~10 dB. In addition, tunable free spectral range of photoluminescence emissions and humidity sensing were also demonstrated. Its advantages of non-destructively tuning, simple fabrication, easy interrogation, and remote monitoring, offer great possible prospects for developing miniature tunable lasers, sensors, and biological endoscopy.