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Optical Atomic Switch utilizing a Molecular Junction
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DOI：10.1039/D5TC03002A.png)
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Abstract
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Optical atomic switches have garnered considerable interest due to its fast switching speed; low energy consumption; and compatibility with quantum information technologies. While atomic modulation via optical excitation has been demonstrated using scanning probe techniques; controlling atomic motion in operable devices remains a key challenge for practical applications. In this study; we operated an optical atomic switch and investigated molecular effects on conductance modulation. Single-molecule junctions incorporating C 60 ; bipyridine; and butanediamine were fabricated using a mechanically controllable break junction technique. Photoirradiation induced conductance enhancement in all molecular junctions. Analysis of current-voltage characteristics in ON and OFF states revealed that atomic motion modulates the electronic coupling between the molecule and electrodes. A systematic comparison across different molecular junctions showed that molecular rigidity significantly influences optical conductance modulation; with flexible molecules like butanediamine exhibiting weaker dependence on initial conductance states.
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Cited Papers
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