Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

High-quality microresonators in the longwave infrared based on native germanium

Journal Article · · Nature Communications
 [1];  [2];  [3];  [2]
  1. University of Notre Dame, IN (United States); Norwegian University of Science and Technology, Trondheim (Norway)
  2. University of Notre Dame, IN (United States)
  3. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
The longwave infrared (LWIR) region of the spectrum spans 8 to 14 μm and enables high-performance sensing and imaging for detection, ranging, and monitoring. Chip-scale LWIR photonics has enormous potential for real-time environmental monitoring, explosive detection, and biomedicine. However, realizing technologies such as precision sensors and broadband frequency combs requires ultra low-loss and low-dispersion components, which have so far remained elusive in this regime. Here, we use native germanium to demonstrate the first high-quality microresonators in the LWIR. These microresonators are coupled to partially-suspended Ge waveguides on a separate glass chip, allowing for the first unambiguous measurements of isolated linewidths. At 8 μm, we measured losses of 0.5 dB/cm and intrinsic quality (Q) factors of 2.5 × 105, nearly two orders of magnitude higher than prior LWIR resonators. Our work portends the development of novel sensing and nonlinear photonics in the LWIR regime.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
Gordon and Betty Moore Foundation (GBMF); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); US Department of the Navy, Office of Naval Research (ONR); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
NA0003525
OSTI ID:
2469908
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 13; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (53)

Normal-dispersion microcombs enabled by controllable mode interactions: Normal-dispersion microcombs journal July 2015
Absorption Spectroscopy in High-Finesse Cavities for Atmospheric Studies journal December 2003
Ultra-high-Q toroid microcavity on a chip journal February 2003
Optical frequency comb generation from a monolithic microresonator journal December 2007
Controlling photonic structures using optical forces journal November 2009
Mid-infrared frequency comb based on a quantum cascade laser journal December 2012
Ultralow-dissipation optomechanical resonators on a chip journal September 2008
Frequency comb assisted diode laser spectroscopy for measurement of microcavity dispersion journal August 2009
Mid-infrared photonics in silicon and germanium journal August 2010
Universal formation dynamics and noise of Kerr-frequency combs in microresonators journal June 2012
Parity–time symmetry and variable optical isolation in active–passive-coupled microresonators journal June 2014
Broadband dispersion-engineered microresonator on a chip journal March 2016
Parity–time-symmetric whispering-gallery microcavities journal April 2014
Ultrasensitive plano-concave optical microresonators for ultrasound sensing journal October 2017
Coherent injection locking of quantum cascade laser frequency combs journal December 2018
Photonic-chip-based frequency combs journal February 2019
Low-temperature growth of Ge on Si(100) journal May 1991
Optical detection of chemical warfare agents and toxic industrial chemicals: Simulation journal June 2005
The third-order nonlinear optical coefficients of Si, Ge, and Si1−xGex in the midwave and longwave infrared journal July 2011
Photoluminescence and secondary ion mass spectrometry investigation of unintentional doping in epitaxial germanium thin films grown on III-V compound by metal-organic chemical vapor deposition journal January 2012
High power frequency comb based on mid-infrared quantum cascade laser at λ ∼ 9  μ m journal February 2015
A review of optical methods for continuous glucose monitoring journal November 2018
Lattice Absorption Bands in Silicon journal February 1959
Broadly tunable single-mode mid-infrared quantum cascade lasers journal January 2015
Multiphonon absorption in highly transparent semiconducting crystals journal September 1977
Direct-Gap Gain and Optical Absorption in Germanium Correlated to the Density of Photoexcited Carriers, Doping, and Strain journal August 2012
Dielectric microcavities: Model systems for wave chaos and non-Hermitian physics journal January 2015
Coupled-mode theory of optical waveguides journal January 1987
Label-Free, Single-Molecule Detection with Optical Microcavities journal August 2007
Long-wave infrared absorption measurement of undoped germanium using photothermal common-path interferometry journal April 2020
Noninvasive glucose monitoring using mid-infrared absorption spectroscopy based on a few wavenumbers journal December 2017
Low-Loss Ge-on-GaAs Platform for Mid-Infrared Photonics conference January 2017
Kerr frequency comb generation in overmoded resonators journal November 2012
Low loss SiGe graded index waveguides for mid-IR applications journal January 2014
Dynamics of mode-coupling-induced microresonator frequency combs in normal dispersion journal January 2016
Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm journal January 2017
Graded SiGe waveguides with broadband low-loss propagation in the mid infrared journal January 2018
Low loss Ge-on-Si waveguides operating in the 8–14 µm atmospheric transmission window journal September 2018
High-power, continuous-wave, phase-locked quantum cascade laser arrays emitting at 8 µm journal January 2019
High-Q diamond microresonators in the long-wave infrared journal February 2020
Few-moded ultralarge mode area chalcogenide photonic crystal fiber for mid-infrared high power applications journal May 2020
Ge-rich graded SiGe waveguides and interferometers from 5 to 11 µm wavelength range journal April 2020
Germanium-on-silicon waveguides for long-wave integrated photonics: ring resonance and thermo-optics journal May 2021
Low-loss germanium strip waveguides on silicon for the mid-infrared journal January 2012
Broadband mid-infrared frequency comb generation in a Si_3N_4 microresonator journal January 2015
Broadband integrated racetrack ring resonators for long-wave infrared photonics journal January 2019
Investigation of mode coupling in normal-dispersion silicon nitride microresonators for Kerr frequency comb generation journal January 2014
High-Q silicon nitride microresonators exhibiting low-power frequency comb initiation journal January 2016
Mid-infrared frequency comb from a ring quantum cascade laser journal February 2020
Low-loss silicon platform for broadband mid-infrared photonics journal January 2017
Ultra-smooth silicon nitride waveguides based on the Damascene reflow process: fabrication and loss origins journal January 2018
Nonlinear Group IV photonics based on silicon and germanium: from near-infrared to mid-infrared journal August 2014
dataset and scripts dataset January 2022

Similar Records

Ultra-high Q alumina optical microresonators in the UV and blue bands
Journal Article · Mon Sep 25 20:00:00 EDT 2023 · Optics Express · OSTI ID:2006515

Longwave infrared (6.6–11.4 µm) dual-comb spectroscopy with 240,000 comb-mode-resolved data points at video rate
Journal Article · Sat Dec 31 23:00:00 EST 2022 · Optics Letters · OSTI ID:2420778

Longwave infrared (6.6–11.4 µm) dual-comb spectroscopy with 240,000 comb-mode-resolved data points at video rate
Journal Article · Tue Apr 18 20:00:00 EDT 2023 · Optics Letters · OSTI ID:1970651