Single Zone Atom Interferometer And Atom Interferometric Lithography Team: Adil Gangat (Under Graduate) Moninder Jheeta (Grad Student/MIT) Jacob Morzinski (Grad Student/MIT) Dr. Ying Tan (Hewlett-Packard) Dr. Prabhakar Pradhan Supported By: ARO

ATOM INTERFEROMETRIC : BASIC IDEA ATOM AS A dE Broglie WAVE v v  = (h / m v) Rb at 300 o C:  = nm 22  Sin  ATOMIC INTERFERENCE

METHOD FOR PUSHING ATOMS: LASER-CONTROLLED SPIN EXCITATION NBNB Time EASY TO LOCALIZE STRONG (UV) RECOIL DECOHERENCE FREE |E> |A, p> |B, p+2  k >

PUSHING TO THE RIGHT |E> |A>|A> |B, 2  k> PUSHING TO THE LEFT |E> |A, p> |B, -2  k>

|A, p> |B, p+2  k >  - SCAN  =0 ==   bb THE BORDE-CHU INTERFEROMETER (BCI)  /2 

|A, p> |B, p+2  k >   bb OUR EXPERIMENT: THE CONTINUOUS INTERFEROMETER (CI)  - SCAN  =0 == 22

3035 MHz 29.3 MHz 63.3 MHz MHz F=3 F=2 F'=2 F'=3 F'=4 F'=1 85 Rb D 2 line D OP R1 R2 ATOMIC BEAM OP R1 R2 D PMT GALVO GLASS SCHEMTIC DESCRIPTION OF THE EXPERIMENTAL SETUP FOR THE CI

DIGNOSTIC ELEMENTS OF THE EXPERIMENTAL SETUP FOR THE CI A C A C A C M M M M M M BS 3035 MHz 29.3 MHz 63.3 MHz MHz F=3 F=2 F’=2 F’=3 F’=4 F’=1 D 2 D OP2 OP1 R1 R2 R1: Raman beam 1 R2: Raman beam 2 D: Detection beam OP1: Optical pumping beam 1 OP2: Optical pumping beam 2

DIGNOSTIC OBSERVATIONS OF THE EXPERIMENTAL SETUP FOR THE CI THE RAMAN DIP THE RAMAN-RAMSEY FRINGES

DIGNOSTIC OBSERVATIONS OF THE EXPERIMENTAL SETUP FOR THE CI SUBLEVEL POPULATIONS WITHOUT OPTICAL PUMPING SUBLEVEL POPULATIONS AFTER OPTICAL PUMPING

OBSERVATION OF INTERFERENCE USING THE CI ATOMIC BEAM D SIGNAL galvo Time Signal Galvo Voltage Time galvo detector

WAVE-PACKET TRAJECTORY SIMULATION OF THE CI  - SCAN  =0 == 22 |A, p> |B, p+2  k >

COUNTER-ROTATING MULTILOOP TRAJECTORIS IN THE CI  - SCAN  =0 == 44 |A, p> |B, p+2  k >

COMPARISON OF THE CI AND THE BCI FRINGE VISIBILITY: Comparable to BCI POWER NEEDED: Comparable to BCI ROTATION SENSITIVITY: Comparable to BCI LOOP AREA USING ATOMIC BEAM: Smaller than BCI (e.g., 22 of mm 2 ) LOOP AREA USING TRAPPED ATOMS: Comparable to BCI ( e.g., 10 4 mm 2 ) COMPLEXITY: Much Simpler Than BCI MULTI-LOOP and OTHER TOPLOGIES: Easily Possible, and Easily Reconfigurable, unlike BCI

LARGE ANGLE INTERFEROMETRY IN 2D

LARGE ANGLE INTERFEROMETRY IN 2D: EXPT. CONFIG

LARGE ANGLE INTERFEROMETRY IN 2D: FRINGE PATTERN

ATOM-INTERFEROMETRIC LITHOGRAPHY