Researchers have found that a snowflake-like fractal design, in which a pattern repeats at ever smaller scales, can increase graphene's inherently low optical absorption, leading to graphene photodetectors with an order-of-magnitude increase in photovoltage, along with ultrafast light detection.

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Researchers have found that a snowflake-like fractal design, in which a pattern repeats at ever smaller scales, can increase graphene's inherently low optical absorption, leading to graphene photodetectors with an order-of-magnitude increase in photovoltage, along with ultrafast light detection.