PicoPerfect Scanner Enables Rapid Error-Free Printing of Atomic Quantum Devices
Abstract:
The majority of atom-defined structures built to date have been held together by extremely weak dispersion interactions and are therefore unstable at room temperature. Moreover, most such assemblies have been fabricated on metal substrates that mask any interesting/useful electronic properties of atomic (or molecular) assemblies. Patterned atomic dangling bonds on an otherwise Hydrogen-terminated silicon surface are robust and unchanging to over 200 C and offer useful electronic properties. This area was pioneered by Joseph Lyding >2 decades ago. Over the last 20 years we have doggedly pursued and overcome fabrication and measurement issues related to dangling bonds and as well have advanced understanding of dangling bond assemblies.
In this talk I will demonstrate the near perfect properties of a new scanning probe actuator. Unlike all other scanners this device exhibits no discernible creep or hysteresis, allowing a probe to be rapidly positioned, independent of previous movement history, with 1 picometer uncertainty. This creep-free scanner allows ~10,000x speed up in fabrication rate because the time required for the tip to settle into position has been reduced from hundreds of seconds to just milliseconds.
I plan to take you on a walk through our “hardware store” to show you the singular tools, techniques and devices we have at hand. We will go well beyond familiar “hydrogen lithography” for spatially defined attachment to explore complex many electron proto devices such as error-free atom defined wires, diverse gates and the first atomic integrated circuit [1, 2]. Crucially, any number of truly identical copies of these entities can be made.
The majority of atom-defined structures built to date have been held together by extremely weak dispersion interactions and are therefore unstable at room temperature. Moreover, most such assemblies have been fabricated on metal substrates that mask any interesting/useful electronic properties of atomic (or molecular) assemblies. Patterned atomic dangling bonds on an otherwise Hydrogen-terminated silicon surface are robust and unchanging to over 200 C and offer useful electronic properties. This area was pioneered by Joseph Lyding >2 decades ago. Over the last 20 years we have doggedly pursued and overcome fabrication and measurement issues related to dangling bonds and as well have advanced understanding of dangling bond assemblies.
In this talk I will demonstrate the near perfect properties of a new scanning probe actuator. Unlike all other scanners this device exhibits no discernible creep or hysteresis, allowing a probe to be rapidly positioned, independent of previous movement history, with 1 picometer uncertainty. This creep-free scanner allows ~10,000x speed up in fabrication rate because the time required for the tip to settle into position has been reduced from hundreds of seconds to just milliseconds.
I plan to take you on a walk through our “hardware store” to show you the singular tools, techniques and devices we have at hand. We will go well beyond familiar “hydrogen lithography” for spatially defined attachment to explore complex many electron proto devices such as error-free atom defined wires, diverse gates and the first atomic integrated circuit [1, 2]. Crucially, any number of truly identical copies of these entities can be made.
Practical information
- General public
- Free
Organizer
- Dr. Tamara de Ara García,
Prof. Harald Brune
Contact
- Prof. Yazyev Oleg <[email protected] >
MER. Zivkovic Ivica <[email protected] >