Daniel Bachman

Cincinnati Children's Hospital Medical Center

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i-10 index

Research Trends

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Document Type

Co-Authors

Vien Van

University of Alberta

Ying Y. Tsui

University of Alberta

Zhijiang Chen

SLAC National Accelerator Laboratory

R. Fedosejevs

University of Alberta

Cameron Horvath

Applied Nanotools (Canada)

David Perron

University of Alberta

Wayne K. Hiebert

National Research Council Canada

Marcelo Wu

National Institute of Standards and Technology

Jocelyn N. Westwood‐Bachman

Applied Nanotools (Canada)

Alan Tsay

University of Alberta

Cooperative Institutions

University of Alberta

National Institute for Nanotechnology

Rutgers, The State University of New Jersey

Cincinnati Children's Hospital Medical Center

Presbyterian Hospital

Cornell University

NewYork–Presbyterian Hospital

New York Hospital Queens

National Research Council Canada

University of Cincinnati

Author Statistics

Papers

Citation

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Research Field

Post-fabrication Trimming of Silicon Photonic Circuits by Femtosecond Laser Pulses

Optical Fiber Communication Conference (2016)

Daniel Bachman Zhijiang Chen Ying Y. Tsui R. Fedosejevs Vien Van

Single femtosecond laser pulses are used to permanently change the effective index of silicon waveguides. The mechanism provides a fast, robust technique for post-fabrication tuning of silicon photonic circuits at the wafer level.

Trimming

10.1364/ofc.2016.tu3e.1

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Citations (1)

Permanent, post-fabrication trimming of polarization diversity silicon circuits by single fs laser pulses

Frontiers in Optics (2014)

Daniel Bachman Zhijiang Chen Jocelyn N. Westwood Wayne K. Hiebert Y. Painchaud

Single 400 nm femtosecond laser pulses were used to perform phase trimming of a polarization diversity, DPSK demodulator based on silicon photonics. The technique may be applied to tune any phase sensitive silicon circuit.

Trimming

Hybrid silicon laser

10.1364/fio.2014.fm3a.5

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Citations (1)

Maintenance of curve correction and unplanned return to the operating room with magnetically controlled growing rods: a cohort of 24 patients with follow-up between 2 and 7 years

Spine Deformity (2023)

Alejandro Marquez‐Lara Daniel Bachman Matthew B. Noble G. B. Preston Sarah Gilday

Cobb angle

10.1007/s43390-023-00644-7

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Citations (4)

Femtosecond laser tuning of Si microring resonators by surface amorphization through a thick SiO2 cladding

Daniel Bachman Zhijiang Chen R. Fedosejevs Ying Y. Tsui Vien Van

Single femtosecond laser pulses are used to modify the surface of c-Si waveguides clad by SiO2 for permanent tuning of microring resonators. Positive, controllable resonance shifts that vary with fluence are demonstrated, inducing little loss.

Cladding (metalworking)

10.1364/cleo_si.2014.sf1j.8

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Citations (1)

Realization of a 4th-order pseudo-elliptic microring filter with negative coupling on SOI

Daniel Bachman Alan Tsay Vien Van

We report the design and realization of a 4th-order pseudo-elliptic microring filter with negative coupling in SOI. Measured filter response showed the effect of coupling phase dispersion and sharp skirt roll-off due to negative coupling.

Realization (probability)

10.1364/cleo_si.2014.sm3g.7

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Citations (0)

Permanent Phase Correction in a Polarization Diversity Si PIC by Femtosecond Laser Pulses

IEEE Photonics Technology Letters (2015)

Daniel Bachman Zhijiang Chen Jocelyn N. Westwood‐Bachman Wayne K. Hiebert Y. Painchaud

We report a fast and efficient method for permanently correcting fabrication-induced phase errors in silicon photonic circuits. The method uses femtosecond laser pulses at 400-nm wavelength to amorphize a thin layer of crystalline silicon near the waveguide surface, thereby inducing a change in the effective index of the waveguide. Using a single femtosecond laser pulse, we reduced the polarization-dependent frequency shift between the two interferometers of a polarization diversity differential phase shift keying silicon demodulator from 11 GHz to less than 0.5 GHz, thereby restoring the polarization diversity operation of the circuit with little degradation to the circuit performance.

Waveguide

10.1109/lpt.2015.2444394

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Citations (5)

Permanent tuning of high-Q silicon microring resonators by Fs laser surface modification

Daniel Bachman Zhijiang Chen R. Fedosejevs Ying Y. Tsui Vien Van

Post-fabrication tuning of silicon microring resonators is accomplished using single fs laser pulses at 400nm with a tuning rate of 20nm/J·cm ^-2 . The resonance mismatch of a 2 ^nd -order microring filter is also corrected.

10.1109/cleopr.2013.6600446

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Citations (1)

Fabrication of Highly Ordered Cylindrical Nanopores with Modulated Diameter Using Anodic Alumina

Srikrishna Chanakya Bodepudi Daniel Bachman Sandipan Pramanik

We propose two novel methods for fabrication of highly ordered cylindrical nanopores with modulated diameter using anodic aluminum oxide (AAO) template. These are (a) multistep anodization in which each step is separated from the next by a controlled wet etching process, and (b) lateral hard anodization of aluminum in malonic acid. This latter method also circumvents the typical sample burning problem which always accompanies surface hard anodization. Further, this method enables high temperature, high voltage anodization studies without requiring a buffer layer of aluminum oxide on the surface.

Anodizing

Nanopore

Anodic Aluminum Oxide

10.1109/nstsi.2011.6111796

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Citations (1)

Polymer Plasmonic Microring Resonators Based on Conductor-Gap-Dielectric Waveguides

Cameron Horvath Daniel Bachman Marcelo Wu David Perron Vien Van

We report the first experimental realization of conductor gap dielectric plasmonic waveguides based on a SU 8 material system with propagation length of 62μm. Compact plasmonic microring resonators are also demonstrated with high intrinsic Q factor.

Realization (probability)

Perfect conductor

Q factor

10.1364/qels.2011.qthl2

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Citations (0)

Thermal nonlinearity and optical bistability in a graphene-silicon waveguide resonator

Camila Horvath Daniel Bachman Vien Van

We report observation of optical bistability due to enhanced thermal nonlinearity in a graphene-silicon waveguide resonator. Ohmic self-heating in the graphene layer results in a 2.7-fold increase in the nonlinear index over bare silicon waveguide.

Optical Bistability

Bistability

Ohmic contact

Waveguide

10.1109/cleopr.2013.6599993

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Citations (1)