Liquid crystal composition used in element for phase control of electromagnetic wave signal

A liquid crystal composition which is used in an element for phase control of an electromagnetic wave signal having any frequency from 1 GHz to 10 THz, the liquid crystal composition comprising at least one compound selected from compounds represented by Formula (1), and having a refractive index anisotropy of 0.30 to 0.80 at 25° C. at a wavelength of 589 nm,

• wherein in Formula (1),
• R1 is alkyl having 1 to 12 carbon atoms, alkoxy having 1 to 12 carbon atoms, alkenyl having 2 to 12 carbon atoms, or alkenyloxy having 2 to 12 carbon atoms, non-adjacent —CH2— in R1 may be replaced by —S—, and hydrogen may be replaced by fluorine,
• ring A11 is a group selected from a group consisting of Groups (A) and (B),
• in groups of Group (A), non-adjacent —CH2— may be replaced by —O— or —S—, in groups of Group (B), at least one —CH═ may be replaced by —N═, and in groups of Groups (A) and (B), at least one hydrogen may be replaced by cyano, fluorine, alkyl having 1 to 5 carbon atoms, or cycloalkyl having 3 to 6 carbon atoms,
• ring A12 is 1,4-phenylene, and at least one hydrogen may be replaced by cyano, fluorine, alkyl having 1 to 5 carbon atoms, or cycloalkyl having 3 to 6 carbon atoms, Z11 is a single bond, —CH═CH—, or —C≡C— Z12 is a single bond, —CH2CH2—, —CH═CH—, or —C≡C— one of Z12 is —CH2CH2—, —CH═CH—, or —C≡C—, and multiple Z12 may all be single bonds when hydrogen of R1 is replaced by fluorine, when Z11 is or when at least one hydrogen in the ring A11 is replaced by cyano, alkyl having 1 to 5 carbon atoms, or cycloalkyl having 3 to 6 carbon atoms, and
• n1 is 1, 2, or 3.