TY - JOUR
T1 - Vertically Illuminated, Resonant Cavity Enhanced, Graphene-Silicon Schottky Photodetectors
AU - Casalino, Maurizio
AU - Sassi, Ugo
AU - Goykhman, Ilya
AU - Eiden, Anna
AU - Lidorikis, Elefterios
AU - Milana, Silvia
AU - De Fazio, Domenico
AU - Tomarchio, Flavia
AU - Iodice, Mario
AU - Coppola, Giuseppe
AU - Ferrari, Andrea C.
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/11/28
Y1 - 2017/11/28
N2 - We report vertically illuminated, resonant cavity enhanced, graphene-Si Schottky photodetectors (PDs) operating at 1550 nm. These exploit internal photoemission at the graphene-Si interface. To obtain spectral selectivity and enhance responsivity, the PDs are integrated with an optical cavity, resulting in multiple reflections at resonance, and enhanced absorption in graphene. We get a wavelength-dependent photoresponse with external (internal) responsivity ∼20 mA/W (0.25A/W). The spectral selectivity may be further tuned by varying the cavity resonant wavelength. Our devices pave the way for developing high responsivity hybrid graphene-Si free-space illuminated PDs for optical communications, coherence optical tomography, and light-radars.
AB - We report vertically illuminated, resonant cavity enhanced, graphene-Si Schottky photodetectors (PDs) operating at 1550 nm. These exploit internal photoemission at the graphene-Si interface. To obtain spectral selectivity and enhance responsivity, the PDs are integrated with an optical cavity, resulting in multiple reflections at resonance, and enhanced absorption in graphene. We get a wavelength-dependent photoresponse with external (internal) responsivity ∼20 mA/W (0.25A/W). The spectral selectivity may be further tuned by varying the cavity resonant wavelength. Our devices pave the way for developing high responsivity hybrid graphene-Si free-space illuminated PDs for optical communications, coherence optical tomography, and light-radars.
KW - graphene
KW - internal photoemission
KW - photodetectors
KW - resonant cavity
UR - http://www.scopus.com/inward/record.url?scp=85035346968&partnerID=8YFLogxK
U2 - 10.1021/acsnano.7b04792
DO - 10.1021/acsnano.7b04792
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C2 - 29072904
AN - SCOPUS:85035346968
SN - 1936-0851
VL - 11
SP - 10955
EP - 10963
JO - ACS Nano
JF - ACS Nano
IS - 11
ER -