Minimalistiska metajets kan styra solsegel för interstellära resor

Forskare har utvecklat små enheter som använder ljus för att kontrollera rörelser i flera riktningar, vilket för potentialen för ljusdrivna rymdfarkoster framåt. Metajets, tillverkade av kisel, testades i en laboratoriemiljö och visade lovande resultat för att styra stora segel genom rymden. Detta genombrott skulle kunna bidra till att övervinna nuvarande begränsningar när det gäller att styra sådana farkoster över stora avstånd.

Forskare vid Texas A&M University har skapat en metajet, en liten kiselplatta på cirka 0,01 millimeter i diameter. Den har en metayta med mikroskopiska pelare som bryter ljus för att generera kontrollerad rörelsemängd. Detta gör att enheten kan röra sig både vertikalt och horisontellt, till skillnad från traditionella solsegel som främst förlitar sig på reflektion.

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