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Multilayer black phosphorus as a versatile mid-infrared electro-optic material | Charles Lin
; Roberto Grassi
; Tony Low
; Amr S. Helmy
; | Date: |
Wed, 11 Nov 2015 01:06:07 GMT (1806kb,D) | Abstract: | We investigate the electro-optic properties of black phosphorus (BP) thin
films for optical modulation in the mid-infrared frequencies. Our calculation
indicates that an applied out-of-plane electric field may lead to red-, blue-,
or bidirectional shift in BP’s absorption edge. This is due to the interplay
between the field-induced quantum-confined Franz-Keldysh effect and the
Pauli-blocked Burstein-Moss shift. The relative contribution of the two
electro-absorption mechanisms depends on doping range, operating wavelength,
and BP film thickness. For proof-of concept, simple modulator configuration
with BP overlaid over a silicon nanowire is studied. Simulation result shows
that operating BP in the quantum-confined Franz-Keldysh regime can enable
improved maximal attainable absorption as well as power efficiency compared to
its graphene counterpart. | Source: | arXiv, 1511.3348 | Services: | Forum | Review | PDF | Favorites |
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