Surface heterostructure nanomechanical actuators with atomic resolution

Makowski, J.D.; Talghader, Joseph J.

doi:10.1063/1.2735675

Cited by 5 publications

(1 citation statement)

References 9 publications

(12 reference statements)

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“…We then extracted the gap width by combining the position data of the fiber with a measurement of the cantilever profile. It might be noted that, if one desires an electronic device, the gap width could be actively controlled using several methods, one of which is described by [32]. Figure 4a illustrates how the photoluminescence (PL) spectrum changes with position along the cantilever as indicated in figure 2.…”

Section: Methodsmentioning

confidence: 99%

Coupling of quantum states with mechanical heterostructures

Makowski

Anderson

Chan

et al. 2009

TRANSDUCERS 2009 - 2009 International Solid-State Sensors, Actuators and Microsystems Conference

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Mechanical positioning is used to control the wavelength of light emission from semiconductor heterostructures. In our work, a Si x N/InP cantilever containing an InGaAs surface well collapses over another InGaAs quantum well. The spacing between the wells varies along the collapsed cantilever, changing the coupling between heterostructures and thus the electron states. In an essence, we are altering the bandgap by the mechanical bending of the cantilever. This is very much similar to the control of photon states by coupling optical cavities with tunable mirrors. Here we report a wavelength shift of up to 22 nm in photoluminescence measurements of two coupled 200 Å surface wells. Associated theory shows that mechanical quantum coupling enables interband or intersubband devices with unprecedented spectral tuning ranges for gain or absorption.

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Section: Methodsmentioning

confidence: 99%