Garrett D. Cole

Sustainability Institute

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

David Follman

Clinical Solutions

Paula Heu

Google (United States)

Markus Aspelmeyer

University of Vienna

Gar-Wing Truong

Clinical Solutions

T. R. Corbitt

Louisiana State University

C. Deutsch

Clinical Solutions

Oliver H. Heckl

University of Vienna

J. Cripe

Louisiana State University

Lukas W. Perner

University of Vienna

Georg Winkler

Christian Doppler Laboratory for Thermoelectricity

Cooperative Institutions

University of Vienna

Massachusetts Institute of Technology

California Institute of Technology

National Institute of Standards and Technology

University of California, Santa Barbara

Vienna Center for Quantum Science and Technology

TU Wien

ETH Zurich

Austrian Academy of Sciences

Centre National de la Recherche Scientifique

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Direct frequency comb measurement of OD + CO → DOCO kinetics

Science (2016)

Bryce Bjork Thinh Bui Oliver H. Heckl P. Bryan Changala B. Spaun

The kinetics of the hydroxyl radical (OH) + carbon monoxide (CO) reaction, which is fundamental to both atmospheric and combustion chemistry, are complex because of the formation of the hydrocarboxyl radical (HOCO) intermediate. Despite extensive studies of this reaction, HOCO has not been observed under thermal reaction conditions. Exploiting the sensitive, broadband, and high-resolution capabilities of time-resolved cavity-enhanced direct frequency comb spectroscopy, we observed deuteroxyl radical (OD) + CO reaction kinetics and detected stabilized trans-DOCO, the deuterated analog of trans-HOCO. By simultaneously measuring the time-dependent concentrations of the trans-DOCO and OD species, we observed unambiguous low-pressure termolecular dependence of the reaction rate coefficients for N2 and CO bath gases. These results confirm the HOCO formation mechanism and quantify its yield.

Hydroxyl radical

10.1126/science.aag1862

Cite

Citations (133)

High-performance direct-bonded semiconductor disk lasers

Garrett D. Cole Catherine Nguyen Gar-Wing Truong David Follman

Membrane-external-cavity surface-emitting lasers (MECSELs) were originally demonstrated by Prof. Mansoor Sheik-Bahae's group at the University of New Mexico (UNM) in 2015. MECSELs consist of an epitaxial active region combined with at least one transparent heatspreader, typically SiC or diamond, employing external cavity mirrors for feedback. The standalone gain element allows for significant flexibility in emission wavelength and is amenable to enhanced power scaling via optimized thermal management. In an extremely fruitful collaboration with UNM beginning in 2017, we progressed from serially-produced chip-scale prototypes, to 4" wafer-scale manufacturing of double-bonded (SiC/epi/SiC) devices capable of single-mode frequency-doubled output powers in excess of 10 W. Leveraging this unique architecture, we see a bright future ahead for multi-Watt-output optically-pumped semiconductor laser systems emitting throughout the visible and infrared spectral regions.

Disk laser

10.1117/12.3010146

Cite

Citations (0)

New Directions in High-Q Optomechanical Membrane Resonators

Pen-Li Yu Thomas Purdy Garrett D. Cole C. A. Regal

We study methods to improve the Q of a variety of highly-stressed resonators for cavity optomechanics. We realize ultrahigh-Q metal/Si3N4 membranes and crystalline membranes, and have begun to control external dissipation via modified support structures.

Optomechanics

Q factor

10.1364/cleo_si.2013.cw3f.8

Cite

Citations (1)

Cooling-by-measurement and mechanical state tomography via pulsed optomechanics

Nature Communications (2013)

Michael R. Vanner Johannes Hofer Garrett D. Cole Markus Aspelmeyer

Quantum tomography

Optomechanics

Position (finance)

Quantum imaging

10.1038/ncomms3295

Cite

Citations (148)

Radiation-pressure-mediated control of an optomechanical cavity

Physical review. A/Physical review, A (2018)

J. Cripe N. Aggarwal Robinjeet Singh Robert Lanza A. Libson

We describe and demonstrate a method to control a detuned movable-mirror Fabry-P\'erot cavity using radiation pressure in the presence of a strong optical spring. At frequencies below the optical spring resonance, self-locking of the cavity is achieved intrinsically by the optomechanical (OM) interaction between the cavity field and the movable end mirror. The OM interaction results in a high rigidity and reduced susceptibility of the mirror to external forces. However, due to a finite delay time in the cavity, this enhanced rigidity is accompanied by an antidamping force, which destabilizes the cavity. The cavity is stabilized by applying external feedback in a frequency band around the optical spring resonance. The error signal is sensed in the amplitude quadrature of the transmitted beam with a photodetector. An amplitude modulator in the input path to the cavity modulates the light intensity to provide the stabilizing radiation pressure force.

Radiation Pressure

Optical cavity

Rigidity (electromagnetism)

Optical path

10.1103/physreva.97.013827

Cite

Citations (27)

Stable Optical Trap from a Single Optical Field Utilizing Birefringence

Physical Review Letters (2016)

Robinjeet Singh Garrett D. Cole J. Cripe T. R. Corbitt

We report a stable double optical spring effect in an optical cavity pumped with a single optical field that arises as a result of birefringence. One end of the cavity is formed by a multilayer Al_{0.92}Ga_{0.08}As/GaAs stack supported by a microfabricated cantilever with a natural mode frequency of 274 Hz. The optical spring shifts the resonance to 21 kHz, corresponding to a suppression of low frequency vibrations by a factor of about 5 000. The stable nature of the optical trap allows the cavity to be operated without any external feedback and with only a single optical field incident.

Optical cavity

Trap (plumbing)

10.1103/physrevlett.117.213604

Cite

Citations (25)

Quantum Backaction Cancellation in the Audio Band

Physical Review X (2020)

J. Cripe T. J. Cullen Yanbei Chen Paula Heu David Follman

Gravitational-wave detectors are ultimately limited by quantum fluctuations induced by light reflecting off the interferometer mirrors. A new experiment explores one way to remove this quantum backaction and improve detector sensitivity.

Quantum sensor

Quantum imaging

10.1103/physrevx.10.031065

Cite

Citations (7)

Use of Aluminum Gallium Arsenide Interference Coatings in Low-Thermal-Noise Precision Optical Experiments

Frontiers in Optics + Laser Science 2021 (2020)

Gregory Harry S. Penn Garrett D. Cole I. A. O. MacMillan Nicholas Demos

Epitaxial aluminum-gallium-arsenide-based optical interference coatings (Al-GaAs) are currently being used in low thermal noise precision optical measurements and are being developed specifically for gravitational wave detectors, which require scaling the coating to 30 cm diameter.

Indium gallium arsenide

Indium arsenide

Arsenide

10.1364/fio.2020.fm5e.4

Cite

Citations (0)

Coherent cancellation of photothermal noise in GaAs/Al_0.92Ga_0.08As Bragg mirrors

Metrologia (2016)

Tara Chalermsongsak E. D. Hall Garrett D. Cole David Follman F. Seifert

Thermal noise is a limiting factor in many high-precision optical experiments. A search is underway for novel optical materials with reduced thermal noise. One such pair of materials, gallium arsenide and aluminum-alloyed gallium arsenide (collectively referred to as AlGaAs), shows promise for its low Brownian noise when compared to conventional materials such as silica and tantala. However, AlGaAs has the potential to produce a high level of thermo-optic noise. We have fabricated a set of AlGaAs crystalline coatings, transferred to fused silica substrates, whose layer structure has been optimized to reduce thermo-optic noise by inducing coherent cancellation of the thermoelastic and thermorefractive effects. By measuring the photothermal transfer function of these mirrors, we find evidence that this optimization has been successful.

Indium gallium arsenide

10.1088/0026-1394/53/2/860

Cite

Citations (36)

Microelectromechanical tunable long wavelength vertical-cavity semiconductor optical amplifiers

Garrett D. Cole Qi Chen E.S. Björlin T. Kimura Shaomin Wu

We present the first demonstration of a microelectromechanical tunable vertical-cavity semiconductor optical amplifier. Electrostatic deflection of the membrane DBR structure has resulted in tunable amplification over an 11-nm wavelength range (1580-1569 nm), with a peak device gain of 17 dB.

10.1109/iciprm.2004.1442824

Cite

Citations (1)