skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Single-Crystal Germanium Core Optoelectronic Fibers

Abstract

Synthesis and fabrication of high-quality, small-core single-crystal germanium fibers that are photosensitive at the near-infrared and have low optical losses ≈1 dB cm-1 at 2 μm are reported. These fibers have potential applications in fiber-based spectroscopic imaging, nonlinear optical devices, and photodetection at the telecommunication wavelengths.

Authors:
 [1];  [1];  [2];  [3];  [1];  [1];  [4];  [1]
  1. Department of Materials Science and Engineering, Materials Research Institute, Pennsylvania State University, University Park PA 16802 USA
  2. Department of Chemistry, Pennsylvania State University, University Park PA 16802 USA
  3. Advanced Photon Source, Argonne National Laboratory, Argonne IL 60439 USA
  4. Department of Materials Science and Engineering, Materials Research Institute, Pennsylvania State University, University Park PA 16802 USA; Department of Chemistry, Pennsylvania State University, University Park PA 16802 USA; Department of Physics, Pennsylvania State University, University Park PA 16802 USA
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division
OSTI Identifier:
1406569
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Advanced Optical Materials; Journal Volume: 5; Journal Issue: 1
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Citation Formats

Ji, Xiaoyu, Page, Ryan L., Chaudhuri, Subhasis, Liu, Wenjun, Yu, Shih-Ying, Mohney, Suzanne E., Badding, John V., and Gopalan, Venkatraman. Single-Crystal Germanium Core Optoelectronic Fibers. United States: N. p., 2016. Web. doi:10.1002/adom.201600592.
Ji, Xiaoyu, Page, Ryan L., Chaudhuri, Subhasis, Liu, Wenjun, Yu, Shih-Ying, Mohney, Suzanne E., Badding, John V., & Gopalan, Venkatraman. Single-Crystal Germanium Core Optoelectronic Fibers. United States. doi:10.1002/adom.201600592.
Ji, Xiaoyu, Page, Ryan L., Chaudhuri, Subhasis, Liu, Wenjun, Yu, Shih-Ying, Mohney, Suzanne E., Badding, John V., and Gopalan, Venkatraman. 2016. "Single-Crystal Germanium Core Optoelectronic Fibers". United States. doi:10.1002/adom.201600592.
@article{osti_1406569,
title = {Single-Crystal Germanium Core Optoelectronic Fibers},
author = {Ji, Xiaoyu and Page, Ryan L. and Chaudhuri, Subhasis and Liu, Wenjun and Yu, Shih-Ying and Mohney, Suzanne E. and Badding, John V. and Gopalan, Venkatraman},
abstractNote = {Synthesis and fabrication of high-quality, small-core single-crystal germanium fibers that are photosensitive at the near-infrared and have low optical losses ≈1 dB cm-1 at 2 μm are reported. These fibers have potential applications in fiber-based spectroscopic imaging, nonlinear optical devices, and photodetection at the telecommunication wavelengths.},
doi = {10.1002/adom.201600592},
journal = {Advanced Optical Materials},
number = 1,
volume = 5,
place = {United States},
year = 2016,
month = 9
}
  • The fiber-optic delivery of sparks in gases is challenging as the output beam must be refocused to high intensity ({approx}200 GW/cm2 for nanosecond pulses). Analysis suggests the use of coated hollow core fibers, fiber lasers, and photonic crystal fibers (PCFs). We study the effects of launch conditions and bending for 2 m long coated hollow fibers and find an optimum launch f of {approx}55 allowing spark formation with {approx}98% reliability for bends up to a radius of curvature of 1.5 m in atmospheric pressure air. Spark formation using the output of a pulsed fiber laser is described, and delivery ofmore » 0.55 mJ pulses through PCFs is shown.« less
  • The optical properties of intersubband transition in a semipolar AlGaN/GaN single quantum well (SQW) are theoretically studied, and the results are compared with polar c-plane and nonpolar m-plane structures. The intersubband transition frequency, dipole matrix elements, and absorption spectra are calculated for SQW on different semipolar planes. It is found that SQW on a certain group of semipolar planes (55° < θ < 90° tilted from c-plane) exhibits low transition frequency and long wavelength response with high absorption quantum efficiency, which is attributed to the weak polarization-related effects. Furthermore, these semipolar SQWs show tunable transition frequency and absorption wavelength with different quantum well thicknesses,more » and stable device performance can be achieved with changing barrier thickness and Al compositions. All the results indicate that the semipolar AlGaN/GaN quantum wells are promising candidate for the design and fabrication of high performance low frequency and long wavelength optoelectronic devices.« less
  • The far-infrared (FIR) transmission properties and index of refraction of thick ( about 2000 A) vitreous germanium oxide films on single-crystal germanium have been measured before and after high temperature reaction with flowing ammonia gas. Significant shifts in the transmission spectra were observed as a function of both time a temperature and NH/sub 3/ flow rate. Correlation was observed with transmission minima reported in the literature for fine powders of germanium nitride and for thin (<1000A) layers of ion-implanted and annealed germanium/oxygen and germanium/ nitrogen complexes. In addition, when the nitrided films were reoxidized at high pressure, structure was observedmore » which corresponded to FIR transmission of hexagonal-phase GeO/sub 2/ powder specimens.« less
  • Ionization-induced change in the refractive index of a gas is shown to give rise to a substantial spectral blueshift of megawatt light pulses transmitted through a gas-filled hollow photonic-crystal fiber (PCF). This effect suggests the ways of controlling not only the rate, but also the sign of the soliton frequency shift for high-peak-power ultrashort light pulses guided in hollow PCFs filled with Raman-active ionizing gases.
  • We study the delivery of few-cycle soliton-like pulses at 800 nm with gigawatt power or microjoule energy through a hollow-core kagome-lattice photonic crystal fiber over 1 m with preserved temporal and spectral shape. We show that with optimized pressure of the argon filling, 5 fs input pulses are compressed up to 2.5 fs after 20 cm and restore their shape after 1 m propagation.