title: Tunable eletro-optical modulators based on a split-ring resonator.
abstract: We present a novel design of an electro-optical modulator setup, consisting of a mechanically tunable cavity which allows the modulation frequency to be varied over a broad range. The design is based on the frequently used geometry of a split-ring resonator which allows for high-efficiency sideband generation. Normally such a configuration has the limitation of a narrow excitation band width ( approximately 20 MHz). Our adjustable setup offers broad-range tunability over several hundred megahertz while still keeping the modulation efficiency. Such a widely tunable modulator may find applications in a variety of experiments in atomic physics.
authors.affiliation: Instituto de Física de São Carlos-USP, Caixa Postal 369, São Carlos, São Paulo 13560-970, Brazil.
authors.forename: R F
authors.initials: RF
authors.lastname: Shiozaki
authors.forename: E A L
authors.initials: EA
authors.lastname: Henn
authors.forename: K M F
authors.initials: KM
authors.lastname: Magalhães
authors.forename: T
authors.initials: T
authors.lastname: Amthor
authors.forename: V S
authors.initials: VS
authors.lastname: Bagnato
mesh_terms: D025802:Electric Capacitance; D004867:Equipment Design; D007834:Lasers; D014159:Transducers