1. 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

2. ATOM INTERFEROMETRIC : BASIC IDEA ATOM AS A dE Broglie WAVE v v  = (h / m v) Rb at 300 o C:  = 0.0153 nm 22  Sin  ATOMIC INTERFERENCE

3. 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 >

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

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

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

7. 3035 MHz 29.3 MHz 63.3 MHz 120.8 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

8. DIGNOSTIC ELEMENTS OF THE EXPERIMENTAL SETUP FOR THE CI A C A C 4 1 2 3 A C M M M M M M BS 3035 MHz 29.3 MHz 63.3 MHz 120.8 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

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

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

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

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

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

14. 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

15. LARGE ANGLE INTERFEROMETRY IN 2D

16. LARGE ANGLE INTERFEROMETRY IN 2D: EXPT. CONFIG

17. LARGE ANGLE INTERFEROMETRY IN 2D: FRINGE PATTERN

18. ATOM-INTERFEROMETRIC LITHOGRAPHY